DE102013004077A1 - A method for producing a cartridge for receiving and metering a flowable dental material and such a cartridge - Google Patents

Abstract

The invention relates to a cartridge (10, 27, 30, 45, 50, 53) made of a first material and for receiving and dispensing a flowable dental material (36) with a reservoir (11) for receiving the dental material (36) Reservoir (11) is connected to a cannula section (14) for dispensing the dental material (36) from the reservoir (11), and to a separate functional element (15, 46, 51, 54) made of a further material that differs from the first material, wherein the functional element (15, 46, 51, 54) is connected to the cannula section (14). In order to be able to implement the manufacturing process and the cartridge more economically, the cartridge (10, 27, 30, 45, 50, 53) is manufactured together with the functional element (15, 46, 51, 54) in a multi-component injection molding process.

Description

The invention relates to a method for producing a cartridge for receiving and metering a flowable dental material with a reservoir for receiving the dental material, wherein the reservoir is connected to a cannula section for dispensing the dental material from the reservoir, and having a function element separate functional element, which is connected to the cannula portion. Furthermore, the invention relates to a cartridge, in particular produced by the method according to the invention, for receiving and metering a flowable dental material with a reservoir for receiving the dental material, wherein the reservoir is connected to a cannula portion for dispensing the dental material from the reservoir, and with a functionally separate functional element associated with the cannula section.

Such a cartridge is from the US 4,391,590 B1 known. Here, the functional element is designed as a cap, which is slipped over a cannula opening of a cannula channel for closing the cannula portion. A disadvantage here is that the cartridge and the cap for the cartridge must be manufactured in two independent manufacturing steps, wherein the cap is usually placed by hand by a person on the cannula opening of the cannula portion. This causes high production costs. In addition, when filling the cartridge with the dental material with an already attached cap the risk of air pockets, whereby the shelf life for the dental material may be limited and / or the filling amount in comparison of several cartridges may have undesirable fluctuations. Such air inclusions can, especially during transport, due to air expansion lead to the loss of the cap, whereby the storage stability is reduced. While filling the cartridge without a cap can reduce the inclusion of air, but there is a risk that dental material leaking from the cannula opening of the cannula portion, whereby dental material is lost. This leads to higher production costs. Especially in the dental field such cartridges are provided for a single use. However, with the use of caps, there is a risk that the cannula portion will be resealed with the cap to later use any residual material. Due to this undesirable reclosure of the already opened cartridge there is a risk of contamination of the dental material.

From the US 6,059,570 a cartridge of the aforementioned type is known in which in the region of an outlet of the cannula portion fibers or flocking is connected to the cartridge. This functional element is used for applying, distributing and / or massaging the dental material. A disadvantage here is that the application of the fibers or flocking takes place in an independent production step and completely independently of the production of the cartridge. Another disadvantage is that the cannula portion is rigid in the region of the fibers or flocking. As a result, there is a risk that a treatment by a patient with the functional element is perceived as unpleasant and / or painful. In addition, due to the rigid training there is a risk of the development of unwanted injuries. Also, the distribution and / or massaging of the dental material is hampered by the rigid design of the cartridge or the cannula portion.

It is therefore the object underlying the invention, a method and a cartridge of the type mentioned, to further develop such that the manufacturing process and the cartridge are less expensive to implement. Another object of the invention is to allow a possible air-free filling of the cartridge and / or to prevent re-closing of the cartridge after a first-time opening as possible. Finally, it is also an object of the invention to improve the dispensing, application and / or massaging of the dental material.

The object underlying the invention is achieved by a method of the type mentioned, in which the cartridge is produced together with the functional element in a multi-component injection molding process. Furthermore, the cartridge mentioned above for achieving the object is characterized in that the cartridge is formed together with the functional element as a multi-component injection molded part, in particular a 2-component injection molded part.

It is advantageous that the functional element is produced together with the cartridge in a, in particular automated, manufacturing process. Thus, the cartridge and the functional element are manufactured as a common multi-component injection molded part. In particular, the cartridge is produced together with the functional element, wherein the functional element and the cartridge are already positioned relative to each other during manufacture such that the functional element is at least partially mounted in the cannula portion and / or at the cannula portion. This eliminates the need for the production of the functional element and the cartridge subsequent assembly of the functional element on and / or in the cartridge. This dispenses with a costly additional production step. A separate production of the cartridge and the functional element and a, in particular manual, assembly is eliminated. Instead, the cartridge already includes the functional element during production by means of the multi-component injection molding process. Thus, the cartridge is formed with the functional element as a multi-component injection molded part. As a result, a cost-effective production process or a more cost-effective cartridge can be realized.

In the context of the present invention, a separate functional element is to be understood as a functional element which has a further function in relation to the cartridge and / or the cartridge housing. In particular, the separate functional element is used for releasably closing the cannula portion and / or for applying, distributing, introducing and / or massaging the dental material. In the context of the present application, a separate functional element is preferably to be understood as meaning either a closure element detachably connected to the cartridge or an application element firmly connected to the cartridge. In particular, a functional element permanently connected to the cartridge is permanently connected to the cartridge and / or can not be detached from the cartridge in a non-destructive manner. Preferably, a separate functional element is to be understood as meaning a functional element which consists of a material deviating from the other constituents of the cartridge. In particular, the cartridge and / or the cartridge housing consists of a first material. The functional element preferably consists of a further, in particular second, material deviating from the first material.

In particular, due to the multi-component injection molding process or the multi-component injection molded part, a complicated, in particular manual, closure of the cannula opening or the cannula channel of the cannula section can be avoided during the production of the cartridge, in particular if the functional element is designed as a closure element. Preferably, the shrinkage of the materials of the cartridge housing and of the functional element, in particular during manufacture by means of the multi-component injection molding process, is matched to one another such that the functional element can be detached from the cannula portion of the cartridge. Alternatively, the functional element is fixed, in particular insoluble, connected to the cartridge.

In the context of the present invention, a flowable and / or viscous dental material is preferably a dental material. In particular, a cartridge according to the invention is used in the dental field, wherein such a cartridge is also referred to as Kompule. Preferably, the cartridge and / or the reservoir for receiving a dental material in an amount in the range of 0.1 g to 0.5 g, in particular 0.25 g, is formed. The ingestible volume of the dental material in the cartridge and / or the reservoir may be at least 100 mm ³ or 200 mm ³ . As an alternative to receiving and metering a flowable dental material, the cartridge may be used for receiving and metering any viscous material, particularly a viscous medical substance.

According to a development of the method according to the invention, the multi-component injection molding process is designed as a two-component injection molding process. In the case of the two-component injection molding process, in a first step, first the functional element can be produced from one, in particular first, plastic material. In a subsequent second step, the cartridge and / or a cartridge housing from a, in particular deviating from the first plastic material second, plastic material can be produced. In particular, in the second step, a cartridge and / or a cartridge housing is produced, which has a reservoir for receiving the dental material, a cannula portion and / or a cartridge base. In the second step of the two-component injection molding process, the cartridge and / or the cartridge housing can be produced and / or sprayed at least partially around the functional element. Furthermore, the cartridge and / or the cartridge housing can be molded onto the functional element in the second step. In particular, the functional element produced in the first step serves at least partially as a core part, around which in the second step the cartridge and / or the cartridge housing is made or completed.

Alternatively, in the case of the 2-component injection molding process, firstly the cartridge and / or the cartridge housing can be produced in a first step and in a subsequent second step the functional element. Preferably, the functional element consists of a thermoplastic elastomer, thermoplastic silicone, thermoplastic polyurethane, liquid silicone or polyolefin. The cartridge and / or the cartridge housing may be made of polyester, in particular of polybutylene terephthalate or polyethylene terephthalate, polyolefin, in particular polypropylene, polyoxymethylene, polyamide, cyclo-olefin copolymers, cyclo- Olefin copolymer blends, polycarbonate, acrylonitrile-butadiene-styrene or styrene polymer exist.

In particular, the functional element and the cartridge, preferably for avoiding a cohesive connection, are formed of different materials. In particular, the shrinkage of the material of the cartridge and / or the cartridge housing is less than the shrinkage of the material of the functional element in order to avoid a shrink fit of the functional element in the cannula portion and / or the cannula channel.

According to a further embodiment, a cannula channel of the cannula portion is at least partially filled with the functional element. In particular, the cannula channel is completely filled by means of the functional element. As a result, the risk is avoided that when filling the cartridge with the dental material air is trapped in the cannula channel. Instead, only the reservoir itself serves to receive the dental material. As a result, an at least largely air-free filling of the cartridge is favored. In a largely or completely filling the cannula channel functional element, a contact surface between the functional element and the inner surface of the cannula channel is provided, which is sufficiently large for holding the functional element in the cannula channel. Preferably, the functional element is releasably, positively and / or non-positively, in particular by friction, connected to the cannula portion. In particular, the functional element is arranged releasably, positively and / or non-positively, preferably by friction, in the cannula channel and / or held. Although the functional element is manufactured as a component of the cartridge as a multi-component injection-molded part, the functional element is preferably not formed integrally with the cartridge. Rather, the functional element can be designed as a detachable from the cartridge component.

After a conceivable independent and independent of the present invention conceivable development of the method, the functional element is formed as a releasable closure element which has a plug part for closing the cannula portion and the plug part a cannula channel of the cannula portion at least partially, in particular completely, is filled.

The cannula channel may have an inner diameter in the range of 0.5 mm to 2.5 mm, in particular an inner diameter of 0.5 mm, 1.4 mm or 2.2 mm. The cannula portion and / or the cannula channel may have a length in the range of 2 mm to 20 mm, in particular of at least 5 mm. The longitudinal axis of the cannula portion and / or the cannula channel is inclined to the longitudinal axis of the cartridge and / or the reservoir at an angle in the range of 40 ° to 60 °. Preferably, the plug part is cylindrical. In particular, the outer diameter of the plug part corresponds to the inner diameter of the cannula channel. Preferably, the functional element is detachably connected to the cartridge or the cannula channel exclusively by means of the stuffing part arranged inside the cannula channel. Thus, further connection surfaces, in particular the cannula channel and / or the cannula portion encompassing surfaces of the functional element, can be avoided.

Preferably, the closure element has a handle part connected to the plug part, in particular designed as an information carrier, outside the cannula section and / or the cannula channel. By means of the grip part, the functional element or the plug part can be released in a simple manner from the cartridge. Here, the handle part may have any shape, as long as it can be grasped by a person with one hand and / or at least between the thumb and the index finger of a hand. Due to the design of the handle part, in particular with regard to the shape and / or color, the handle part can also serve as an information carrier for the dental material contained in the cartridge and / or the intended use. Alternatively or additionally, the grip part may be printed with a logo, a QR code and / or a lot number or batch number.

After a development of the method that is also conceivable independently and independently of the present invention, the functional element is designed as an application element for dispensing and / or applying the dental material. Thus, the application element of the cartridge serves for dispensing, applying, introducing and / or massaging the dental material during a treatment of a patient. Preferably, the application element is fixed, in particular insoluble, connected to the cartridge and / or the cartridge housing. For example, the application element may be welded to the cartridge and / or the cartridge housing. Preferably, the connection of the application element with the cartridge and / or the cartridge housing is formed positively and / or non-positively. The compound can be realized by adhesion due to a suitable material combination. In particular, the application element is at least partially shrunk onto the cartridge, the cartridge housing and / or the cannula section. Preferably, the application element is not non-destructively detachable from the cartridge and / or the cartridge housing.

According to a further embodiment, the application element is made of a resilient plastic material. Due to a soft and / or elastic plastic material for the application element, applying and / or massaging the dental material on the one hand is easier for the person performing the treatment and on the other hand more pleasant and / or gentle for the patient. In particular, the elastic plastic material of the application element has a hardness in the range of Shore A or Shore D, particularly preferably in the range from 30 Shore A to 90 Shore A. Preferably, the material of the application element is different from the material of the other constituents of the cartridge and / or the cartridge housing. In particular, the cartridge and / or the cartridge housing consists of a first material and the application element of a deviating from the first material second material.

Preferably, an outlet of the application element is closed with a separate and / or detachable closure element. In particular, the separate closure element is produced independently of the cartridge with the functional element in an independent manufacturing process. Vorzgusweise the closure element is designed as a closure cap, which is at least partially slipped over the application element for closing the outlet. Thus, for cartridges in the dental field usual caps for closing the cartridge can be used.

According to a further development, after the cartridge has been produced, the functional element filled with the functional element which preferably closes the cannula section, in particular filling the cannula canal, is filled with the dental material through an opening in the reservoir facing away from the cannula section, in particular automatically. Preferably, after the reservoir has been filled, a piston is introduced into the opening for closing the reservoir, in particular automatically. Thus, the production of the cartridge with the, in particular for closing the cannula channel mounted, functional element, the filling of the cartridge and the insertion of a piston for closing the cartridge can be done completely automated. Thus, an intermediate step of, in particular manual, assembly of the functional element on the cartridge can be avoided and it is a total cost-effective production of the cartridge feasible.

According to a development of the cartridge according to the invention, the wall thickness of the cartridge is reinforced in an end region of the reservoir facing the cannula section. In particular, the cartridge, preferably in the front area, designed for a pressure load of at least 2 bar. The forehead area is exposed to high forces when expressing the dental material from the cartridge. Due to a reinforced end region with a greater wall thickness with respect to other regions of the cartridge, the risk of damage and / or bursting of the cartridge in the forehead region is considerably reduced. Preferably, the wall thickness of the cartridge is reduced in a central region of the reservoir. Significantly lower forces also occur in the middle region of the reservoir when the dental material is pressed out in comparison to the other regions. This makes it possible to reduce the wall thickness in the central region, whereby material can be saved during manufacture of the cartridge and thus a cartridge can be produced less expensively. Preferably in the longitudinal direction of the reservoir extending stiffening struts are provided in the central region with the reduced wall thickness. On the one hand, this makes it possible to further reduce the wall thickness in the middle region, and on the other hand it is ensured by the stiffening struts that the forces occurring, in particular when the dental material is expressed, can be absorbed and / or passed on without the risk of damage and / or bursting of the cartridge ,

According to another embodiment, a cartridge base for receiving the cartridge in a dispenser is provided at an end of the reservoir facing away from the cannula portion, the cartridge base having an opening for receiving a movable piston for closing the reservoir and for forcing the dental material out of the reservoir. In particular, the cartridge base is annular and / or serves for receiving and holding the cartridge in a dispenser. The dispensing device preferably serves for metered dispensing or pushing out of the dental material from the reservoir and through the cannula section, in particular the cannula channel, and / or the functional element, in particular the application element. For this purpose, the dispensing means may comprise a movable piston-like punch which is insertable through the opening of the cartridge base in order to push the piston of the cartridge in the direction of the end region of the reservoir. As a result, the dental material is pressed through the cannula channel to the outside in a free cannula channel. Preferably, the discharge force for squeezing the dental material in a typical use is in the range of about 100 N to 400 N, in particular about 140 N. In particular, the cartridge base has a maximum outer diameter which corresponds to the maximum outer diameter of the cartridge at an end facing away from the cartridge , Preferably, a reinforced end portion of the cartridge has a maximum outer diameter corresponding to the maximum outer diameter of the Cartridge base corresponds. As a result, the cartridge can be deposited substantially horizontally with respect to its longitudinal axis on a horizontal plane, whereby, for example, packaging of the cartridge is facilitated.

In particular, on an inner surface of the, preferably circular, opening of the cartridge base in the direction of displacement of the piston and / or extending in the longitudinal direction of the reservoir vent grooves are provided. Due to the vent grooves, air may escape from the reservoir upon insertion of the plunger to close the reservoir filled with the dental material. As a result, a largely, in particular completely, air-free filling of the reservoir or of the cartridge with the dental material is made possible. Upon insertion of the piston, the air contained in the reservoir and displaced by the piston can flow out to the side of the piston to the outside.

According to a development, an anti-twist device is provided on a cartridge base which faces away from the cannula section. Preferably, an anti-rotation device is provided on an outer side of the reservoir for preventing twisting of the cartridge in a dispenser. In particular, the rotation lock on a positive connection for preventing rotation of the cartridge about the longitudinal axis of the cartridge and / or the reservoir. The anti-rotation device may comprise a non-slip sleeve, which is insertable into a receptacle of the dispensing device for holding the cartridge. In particular, the sleeve consists of an elastomer, a thermoplastic elastomer (TPE), a rubber material and / or a hard rubber material. Preferably, the sleeve is made of an elastomer which is of a classical nature, crosslinking and / or thermoplastically processable, in particular reversible. Preferably, the sleeve is positively connected to prevent rotation of the sleeve about the longitudinal axis of the cartridge with the cartridge base. The anti-rotation device and / or sleeve can cooperate with stiffening struts of the cartridge, which extend in the longitudinal direction of the cartridge and / or the reservoir in a central region of the reservoir with a reduced wall thickness. In particular, the receptacle of the delivery device can be designed to engage in the intermediate regions between the stiffening struts. Alternatively, the anti-twist device can be injection-molded onto the cartridge and / or the cartridge base as part of a multi-component injection molding process, in particular a three-component injection molding process as a third component. The anti-twist device can serve, in particular because of a color coding, as an information carrier for the dental material contained in the cartridge and / or the intended use. Alternatively or additionally, the grip part may be printed with a logo, a QR code and / or a lot number or batch number.

According to a further embodiment, a movable piston is arranged in the reservoir for closing the reservoir and for pushing out the dental material from the reservoir, which has a first radius at its first piston end facing the reservoir and / or the dental material, which corresponds to the inner radius of the reservoir. Preferably, the piston is movable by means of a piston-like punch of a delivery device in the direction of the cannula portion. The first piston end may be conical. Preferably, an area of the piston facing away from the reservoir and / or the dental material has a second radius reduced with respect to the first radius. This results in particular in combination with vent grooves an enlarged passage for the escape of air during insertion of the piston for closing the reservoir and / or it is a material savings in the production of the piston feasible. Preferably, a second piston end remote from the first piston end has a further radius which corresponds to the first radius. In particular, the piston rests in the region of the first end and / or in the region of the second end against an inner surface of the cartridge and / or the reservoir. As a result, the reservoir can be closed by the piston and / or the piston is guided on the inner surface for pushing out the dental material. Preferably, the first piston end and the second piston end are identical and / or mirror-symmetrical to each other. As a result, the piston can be inserted on either side either with the first piston end in front or the second piston end in the cartridge, thereby reducing the assembly effort.

According to a further embodiment, which is also conceivable independently and independently of the present invention, the functional element is designed as a closure element for closing a cannula channel of the cannula section. In this case, the closure element has a detachably, positively and / or non-positively, in particular frictionally engaged, held in the cannula channel plug part, which at least partially fills the cannula channel for closing the cartridge. In particular, the plug portion completely fills the cannula channel. The plug portion may have a length which corresponds at least to the length of the cannula channel. Preferably, the plug member is longer than the cannula channel, the plug member exiting the cannula channel and / or cartridge in communication with the cannula channel and overhanging the cannula portion and / or a free end of the plug member is flush with the cannula channel at the transition to the reservoir , The plug part may have a handle part at a free end outside the cannula section and / or outside the cannula channel, in particular as an information carrier.

According to a development which is also conceivable independently and independently of the present invention, the functional element is designed as an application element for dispensing, massaging, introducing and / or applying the dental material. Preferably, the application element is fixed, in particular insoluble, connected to the cartridge and / or the cartridge housing. In particular, the connection of the application element with the cartridge and / or the cartridge housing is formed positively and / or non-positively. The outer peripheral surface and / or the outer contour of the application element may have a substantially rectangular, cuboidal or spherical shape

In particular, the application element is made of a soft and / or elastic plastic material. In particular, the material of the application element has a hardness in the range of Shore A or Shore D, particularly preferably in the range from 30 Shore A to 90 Shore A. In particular, the application element has one or more lips, wherein preferably the lips form an outlet for the dental material. The soft and / or elastic application element allows a gentle application of the dental material in a treatment. The distribution and / or massaging of the dental material is facilitated. Depending on the application, the application element may be designed with different cartridges in different lengths. The risk of undesired injury during treatment is considerably reduced due to the soft and / or elastic material of the application element.

According to a further embodiment, the application element has at least one elevation, in particular a plurality of elevations, for the releasable setting of a separate closure element on an outer surface of the application element. Thus, an independent closure element may be provided to close the cartridge and / or the application element. Here, the closure element is detachable, in particular peelable and / or unscrewable, connected to the cartridge and / or the application element. Preferably, the elevations are formed from the elastic material of the application element. A closure element which is slipped over the application element and the elevations can be sufficiently fixed by means of the elevations, which are preferably uniformly distributed around the outer peripheral surface of the application element, so that the risk of unintentional release of the closure element is reduced. Preferably, the application element is partially disposed on an outer side of the cartridge and / or the cannula portion. In particular, at least one coating region of the application element is arranged on an outer side of the cartridge and / or the cannula portion. Thus, the application element may extend at least partially by means of a coating region or several coating regions on the outside of the cartridge and / or the cartridge housing. Due to the soft and / or elastic material of the application element or of the coating area, an improved grip of the cartridge can be achieved as a result. Further, the design of the coating area may serve as a design element to obtain an aesthetically pleasing cartridge.

The application element preferably has an outlet for dispensing and / or applying the dental material. In particular, the outlet is arranged on an end of the application element facing away from the cartridge housing. The outlet may have a rectangular, square, round or oval cross-section, in particular with regard to its outer contour and / or inner contour. Preferably, the application element has a shape towards the outlet, in particular conically, narrowing or expanding.

After a development that is also conceivable independently and independently of the present invention, the application element has bristles. In particular, the bristles can be produced as part of the application element in the multi-component injection molding process. Thus, a subsequent attachment of fibers and / or additional flocking can be avoided. Preferably, the bristles extend away from the outlet. In particular, the bristles extend from the outlet parallel to each other and / or in the axial direction to a longitudinal axis of a cannula channel. All bristles may be the same or at least partially deviating from each other in terms of their length and / or diameter. Thus, different configurations are more similar or conceivable with regard to the length and / or thickness of different types of bristles. By means of the bristles a greater softness and / or elasticity for the application element can be achieved. This makes a treatment more pleasant for a patient. In particular, a distribution and / or a massaging of the dental material can be improved by means of the bristles.

According to a further embodiment, which is also conceivable independently and independently of the present invention, the application element has a groove-like extension extending from its outlet, in particular for dispensing of the dental material in a cavity and / or tooth pocket. The channel-like extension may be sword-like. In particular, the groove-like extension has at its free end a, particularly preferably obtuse, plug-in part for insertion into a cavity and / or tooth pocket. By means of the free end of the male part made of a soft and / or elastic material, a cavity and / or tooth pocket is to be opened in a way that is more comfortable for the patient. Preferably, the male part widens starting from the free end in the direction of the outlet and in terms of its width. In particular, at the free end of the male part, a first region having a first width and spaced from the free end in the direction of the outlet, a second region having a second width is provided, wherein the second width is greater than the first width. In one treatment, the trough-like extension with the first area and / or the second area can be inserted into the cavity and / or tooth pocket. By means of the first and / or second region, a more uniform distribution of the dental material than by means of a needle or cannula is made possible. As a result, the pain burden and / or pressure load of the patient is reduced due to the introduced dental material. The risk of injury is significantly reduced due to the soft and / or elastic material of the application element.

The invention will be explained in more detail with reference to the following figures. Show it:

1 a side view of a first cartridge according to the invention,

2 a sectional side view of the first cartridge according to the invention according to 1 .

3 a sectional side view of a second cartridge according to the invention,

4 a rear view of the cartridge according to the invention according to 1 .

5 a perspective side view of a third cartridge according to the invention with an anti-rotation,

6a - 6f sectional side views of the cartridge according to the invention in various stages of filling,

7 a perspective side view of a fourth cartridge according to the invention with a first application element as a functional element,

8th a side view of a fifth cartridge according to the invention with a second application element as a functional element,

9 a section of the side view of the fifth cartridge with the second application element according to 8th .

10 a perspective side view of another cartridge according to the invention with a further application element as a functional element,

11 a side view of a cartridge according to the invention after 10 with an attached cap,

12 a side view of the cartridge according to the invention 10 with the other application element and a withdrawn cap,

13 a first schematic flow diagram for a method according to the invention, and

14 a further schematic flow diagram for a method according to the invention.

1 shows a side view of a first cartridge according to the invention 10 , The cartouche 10 has a reservoir 11 for receiving a dental material not shown here. The reservoir 11 is substantially tubular with a closed first end 12 and one from the first end 12 remote and open according to this illustration second end 13 designed.

The first end 12 of the reservoir 11 is a cannula section 14 assigned. In this embodiment, the cannula portion 14 tubular. The longitudinal axis of the cannula section 14 is aligned transversely to the longitudinal axis of the reservoir. In this example, the angle is between the longitudinal axis of the reservoir 11 and the longitudinal axis of the cannula portion 14 about 45 °. Alternatively, the angle is in the range of 40 ° to 60 °. The cannula section 14 is integral with the reservoir 11 educated.

A functional element 15 is the cannula section 14 assigned. The functional element 15 has a cylindrical plug part 16 which is largely within the cannula section 14 is arranged, wherein a portion of the plug part 16 in this embodiment, from that of the reservoir 11 opposite end of the cannula portion 14 stands out to the outside.

Next has the functional element 15 a handle part 17 for gripping the functional element 15 by a person. The handle part 17 is at the from the cannula section 14 protruding portion of the plug part 16 arranged and in this embodiment integral with the plug part 16 educated. By means of the grip part 17 is the functional element 15 exemplified here as a closure element for the reservoir 11 is formed, or the plug part 16 from the cannula section 14 pulled out.

The handle part 17 is here exemplified as a triangular plate. Alternatively, other configurations of the grip part 17 conceivable, for example, as a quadrangular, pentagonal, hexagonal, polygonal, circular or elliptical plate or in a substantially cylindrical, conical, spherical, elliptical shape, etc. The handle part 17 has several ribs in this embodiment 18 that the grip of the grip part 15 increase. For better clarity, not all ribs are 18 provided with a reference numeral.

Due to the design of the handle part 17 depending on the type of dental material in the reservoir 11 serves the handle part 17 as an information carrier for the content and / or the use of the cartridge 10 ,

The second end 13 of the reservoir 11 is a cartridge base 19 assigned. The cartridge base 19 is substantially annular and serves to arrange the cartridge 10 in a dispenser not shown here. By means of the dispenser is a cylinder or a piston-like punch in the longitudinal direction of the cartridge 10 or of the reservoir 11 in the reservoir 11 movable, resulting in a remote functional element 15 the dental material from the reservoir 11 and through the cannula section 14 is deliverable to the outside.

From the reservoir 11 , the cannula section 14 and the cartridge base 19 is a cartridge case 44 educated.

In a middle area 20 of the reservoir 11 is the wall thickness of the cartridge 10 in relation to the wall thickness of the reservoir 11 outside the middle area 20 reduced, whereby a material saving is realized. In the middle area 20 is the outer surface of the reservoir 11 in relation to the outer surface outside the middle area 20 offset inwards. In the longitudinal direction of the cartridge 10 or of the reservoir 11 are in the middle range 20 stiffening struts 21 arranged.

The stiffening struts 21 extend in the longitudinal direction of the cartridge 10 or of the reservoir 11 and serve the additional stiffening of the middle area 20 , This is also in a reduction of the wall thickness in the central region 20 a sufficient stability achievable. In this embodiment, three stiffening struts 21 evenly around each other around the outer circumference of the central area 20 arranged distributed. Alternatively, a single stiffening strut or two, four, five, six or more stiffening struts are also possible 21 conceivable.

2 shows a sectional side view of the cartridge according to the invention 10 according to 1 , The reservoir 11 has a cylindrical interior 22 , wherein the cylindrical interior in the region of the first end 12 in a cone-shaped piston receptacle 23 passes.

A cannula canal 24 of the cannula section 14 is with the reservoir 11 in the area of the piston receiver 23 connected. In this embodiment, the cannula channel 24 over its entire length with the plug part 16 of the functional element 15 filled or closed. Thus, a dental material not shown here in detail from the reservoir 11 not in the cannula canal 24 reach.

In the area of the second end 13 of the reservoir 11 and the cartridge base 19 are webs 26 intended. The bridges 26 are in the longitudinal direction of the cartridge 10 or of the reservoir 11 aligned and equally spaced from each other on the inner surface of an opening 43 the substantially annular cartridge base 19 arranged distributed. In the radial direction with respect to the longitudinal axis of the reservoir 11 The bridges extend 26 only so far that the barrier-free diameter of the interior 22 of the reservoir 11 in the area of the bridges 26 is continued. Thus, the interior continues 22 of the reservoir in the region of the second end 13 and the cartridge base 19 gone, without this one due to the bars 26 is impaired. Between the bridges 26 are vent grooves 25 formed whose function will be explained in more detail below. In this embodiment, the webs 26 wider than the vent grooves 25 , Alternatively, the positions and / or the width of the webs 26 and the ventilation grooves 25 be reversed, so the reference numerals 26 the vent grooves and the reference numerals 25 denote the webs.

3 a sectional side view of a second cartridge according to the invention 27 , The construction of the cartridge 27 largely corresponds to that of the cartridge 10 , In that regard, reference is also made to the preceding description. The cartouche 27 is here without the functional element 15 shown. Unlike the cartridge 10 is the cartouche 27 in the area of the first end 12 of the reservoir 11 and compared to the second end 13 reinforced trained. In the area of the first end 12 or a forehead area 28 the cartouche 27 and / or the reservoir 11 , the wall thickness is greater than in the region of the second end 13 of the reservoir 11 or the cartridge 27 ,

When pushing out a dental material not shown here from the reservoir 11 through the cannula canal 24 acts a compressive force in the longitudinal direction of the cartridge 27 or of the reservoir 11 and towards the first end 12 or the forehead area 28 , Due to the reinforced version in the forehead area 28 or a larger wall thickness in the forehead area 28 are the pressure forces occurring absorbable and forwarded, with the risk of damaging the cartridge 27 is significantly reduced even at unusually high forces.

4 shows a rear view of a cartridge according to the invention 10 according to 1 without the functional element 15 , wherein the following illustration analogously apply to all cartridge designs according to this description. In this embodiment, six webs 26 evenly spaced from each other on the inner surface of the cartridge base 19 arranged distributed. Accordingly, here are six vent grooves 25 evenly on the inner surface of the cartridge base 19 distributed. Alternatively, there are fewer or more bars 26 or bleeding grooves 25 conceivable.

For better clarity, not all bars are 26 and vent grooves 25 provided with a reference numeral.

The annular cartridge base 19 and the footbridges 26 are coaxial with the longitudinal axis of the substantially cylindrical interior 22 aligned. Here, the webs extend 26 to the outer periphery of the interior 22 inside, so the diameter of the interior 22 also in the area of the second end 13 and the cartridge base 19 barrier-free remains.

In the unfilled and unclosed state of the cartridge shown here 10 is an opening 29 to recognize, with the the interior 22 in conjunction with the cannula channel 24 of the cannula section 14 stands.

5 shows a perspective side view of a third cartridge according to the invention 30 with an anti-twist device 31 , The structure largely corresponds to that of the cartridge 10 , In that regard, reference is also made to the preceding description. In this embodiment, the rotation is 31 the cartridge base 19 assigned.

Around the outer peripheral surface of the cartridge base 19 is a sleeve 32 arranged. The sleeve 32 is here formed by way of example of an elastomer. Furthermore, the sleeve 32 by means of a positive connection 33 with the cartridge base 19 connected, the connection 33 a twisting of the sleeve 32 around the longitudinal axis of the cartridge 30 or of the reservoir 11 prevented.

For this purpose, the outer peripheral surface of the cartridge base 19 in this embodiment, an annular wave profile 34 on. Here are the longitudinal axes of the wave crests and wave troughs of the wave profile 34 in the longitudinal direction or parallel to the longitudinal axis of the cartridge 30 or of the reservoir 11 aligned. The inner surface of the sleeve 32 indicates to the wave profile 34 correspondingly formed wave profile 34 on. This is the sleeve 32 in the longitudinal direction of the cartridge 30 or of the reservoir 11 on the cartridge base 19 pushed, but in the assembled state, a rotation of the cartridge 30 in relation to the sleeve 32 around the longitudinal axis of the cartridge 30 or of the reservoir 11 is prevented. Alternatively, the sleeve 32 in the context of a multi-component injection molding process, in particular a 3-component injection molding process, to the cartridge base 19 be sprayed. With a suitable choice of material and / or a sufficient adhesion between the molded sleeve 32 and the karting base 19 can in this case also on a wave profile 34 be waived.

The cartridge base 19 and the sleeve 32 are dimensioned such that the cartridge base 19 together with the sleeve 32 in a usual recording of a dispenser not shown here is receivable or plugged. Due to the non-slip or friction training of the sleeve is the risk of twisting of the cartridge 30 in the receptacle of the dispenser about the longitudinal axis of the cartridge 30 or of the reservoir 11 considerably reduced.

6a - 6f show sectional side views of the cartridge according to the invention 10 at various stages of filling, with the following description analogous to all cartridge designs according to the present description.

6a shows the cartouche 10 with the functional element 15 into the cannula section 14 is inserted and the cannula channel 24 completely fills, leaving the opening 29 is closed. The cartouche 10 is as a first component and the functional element 15 formed as a second component of a 2-component injection molded part. In this embodiment, there is 2-component injection molded part made of polybutylene terephthalate.

The second end 13 of the reservoir 11 and the annular cartridge base 19 are open. Thus, the interior 22 of the reservoir 11 accessible. The cartouche 10 is oriented such that the longitudinal axis of the cartridge 10 or of the reservoir 11 is substantially vertical.

6b shows that to fill the cartridge 10 a filling tube 35 through the open cartridge base 19 and the open end 13 in the interior 22 is introduced. After insertion of the filling tube 35 becomes a dental material 36 in the interior 22 issued. This fills the interior 22 starting from the first end 12 towards the second end 13 ,

6c is the one with the dental material 36 padded kart search 10 refer to. Almost the entire interior 2 is with the dental material 36 refilled. The filling tube 35 is removed. Only in the area of the second end 13 of the reservoir 11 remains a free residual volume 37

6d shows the cartouche 10 with a provided piston 38 for the cartridge 10 , The piston 38 has a conical first piston end 39 on, that of the cartouche 10 or the cartridge base 19 is facing. The first piston end 39 has a maximum radius or outer circumference corresponding to the inner radius of the reservoir 11 or the interior 22 equivalent. One from the first piston end 39 remote second piston end 40 also has a radius in this embodiment, which corresponds to the inner radius of the reservoir 11 or the interior 22 equivalent. A middle piston area 41 between the first piston end 39 and the second piston end 40 has one in comparison with the maximum radius or outer circumference of the first piston end 39 or the second piston end 40 a smaller radius or reduced outer circumference.

6e it can be seen that the piston 38 with the conical first piston end 39 progressing through the annular cartridge base 19 into the cartouche 10 is introduced. This slides the piston 38 in the area of the cartridge base 19 along the footbridges 26 , When inserting the piston 38 it flows in the cartridge 10 and the reservoir 11 still air around the piston 38 around and through the ventilation grooves 25 from the cartridge base 19 outward, as with arrows 42 is indicated schematically.

6f shows the cartouche 10 with the piston 38 in its final position for closing the cartridge 10 or of the reservoir 11 , Here is the cone-shaped first end 39 almost completely in the interior 22 or the dental material 36 immersed. The annular component of the first cone end 39 lies the interior 22 sealing on the inner surface of the reservoir 11 at. Due to the cone-shaped design of the first cone end 39 and the vent grooves 26 is an at least approximately airless filling of the interior 22 with the dental material 36 he follows. The cartouche 10 is now ready for normal use with a dispenser. All steps for filling the cartridge 10 and the insertion of the piston 38 according to the 6a to 6f are completely automated.

7 is a perspective side view of a fourth cartridge according to the invention 45 in which a functional element 46 as a first application element 46 designed for dispensing and applying the dental material. Same features as before bear the same reference numerals. In that regard, reference is also made to the preceding description. The application element 46 in this embodiment is fixed to the cartridge housing 44 or the cannula section 14 connected. In this embodiment, the application element 46 and the cannula section 14 so firmly connected to each other that a non-destructive detachment of the application element 46 is prevented. The application element 46 consists of a resilient plastic material, so that the application element 46 soft and flexible. In this embodiment, the application element 46 formed from a thermoplastic elastomer.

The application element 46 forms an extension of the cannula portion 14 and has an outlet 47 to exit the dental material to the outside. The outlet 47 is at a free end of the application element 46 and from the reservoir 11 arranged away. The outlet 47 has here for example a rectangular cross-section. Alternatively, other cross sections, such as a square, round or oval cross-section, conceivable. The cross section of the connection of the application element 46 to the cannula section 14 corresponds essentially to the cross section of the cannula section 14 which is exemplary here in terms of its outer circumference. Thus, the cross section of the application element changes 46 continuously and starting from the cannula section 14 in the direction of the outlet 47 ,

The application element 46 has several coating areas in this embodiment 48 on that on the outside of the cartridge housing 44 , here the cannula section 14 are arranged. The coating areas 48 lie on the outside of the cannula section 14 on and are fixed to the outside of the cannula section 14 connected. Here are the coating areas 46 web-like and extend from the application element 46 in the axial direction of the cannula section 14 to the reservoir 11 out. In this embodiment, four web-like coating areas 48 substantially evenly around the cannula section 14 arranged distributed.

Furthermore, the application element has 46 in this embodiment, several surveys 49 extending from the outer surface of the application element 46 to rise to the outside. Here is a survey 49 by way of example at the outer end of the web-like coating region 48 arranged. The surveys 49 are used for releasably securing a closure cap, not shown here, for closing the outlet 47 over the application element 46 is invisible. Because of the surveys 49 from the soft and elastic material of the application element 46 is a sufficient tight fit of the cap reached. Here are the surveys 49 exemplified formed as knobs.

8th shows a side view of a fifth cartridge according to the invention 50 in which a functional element 51 as a second application element 51 is trained. Same features as before bear the same reference numerals. In that regard, reference is also made to the preceding description. The second application element 51 largely corresponds to the first application element 46 according to 7 , In addition, in the second application element 51 several bristles 52 intended.

The bristles 52 are integral with the application element in this embodiment 51 educated. Furthermore, the bristles extend 52 here by way of example in the axial direction of the cannula section 14 and are arranged substantially parallel to each other.

9 is a section of the side view of the fifth cartridge 50 with the second application element 51 according to 8th refer to. In this embodiment, there are two different types of bristles 52 , first bristles 52.1 and second bristles 52.2 provided, which differ in terms of their length and their diameter. The first bristles 52.1 are longer here for example than the second bristles 52.2 educated. Furthermore, the first bristles have 52.1 one compared to the second bristles 52.2 larger diameter. The first bristles 52.1 are at two away from each other and substantially parallel edges of the outlet 47 arranged while the second bristles 52.2 at two substantially perpendicular to the edges with the first bristles 52.1 aligned edges of the outlet 47 are arranged. As an alternative to the exemplary embodiment shown here, any arrangements of similar and / or a plurality of differently shaped bristles are conceivable.

10 shows a perspective side view of another cartridge according to the invention 53 in which a functional element 54 as another application element 54 is trained. Same features as before bear the same reference numerals. In that regard, reference is also made to the preceding description. The further application element 54 corresponds in many parts to the first application element 46 according to 7 , In this embodiment, the application element 54 although no coating areas 48 or surveys 49 intended. However, even with the application element 54 one or more coating areas 48 or surveys 49 conceivable. In addition, the further application element has 54 a trough-like extension 55 on.

The trough-like extension 55 extends from the outlet 47 in the axial direction of the cannula section 14 , Here is the trough-like extension 55 trained for forwarding or guiding the dental material, which from the outlet 47 exit. In this embodiment, the trough-like extension 55 by two substantially mutually perpendicular extensions of the outlet 47 educated.

At its free and from the outlet 47 opposite end has the trough-like extension 55 a plug-in part 56 , The plug-in part 56 is formed obtuse angled in this embodiment and is used for insertion of the application element 54 in a not shown here cavity or tooth pocket. The plug-in part 56 has a first maximum width in a first area of its free end. From the free end and towards the outlet 47 spaced apart the plug-in part expands 56 to a second area with a larger width. Here, the plug-in part 56 in the second region, a second maximum width, wherein the second maximum width is greater than the first maximum width. Due to the larger surface of the male part 56 in the second region, the dental material can be introduced over a large area into a cavity and / or tooth pocket.

11 is a side view of a cartridge according to the invention 53 to 10 with an attached cap 57 refer to. Here is the cap 57 by way of example via the further application element 54 slipped. Alternatively, the cap 57 be provided for closing any application element. In particular, the cap is 57 for the cartridge 45 with the first application element 46 or the cartouche 50 with the second application element 51 be provided.

The cap 57 encloses the other application element 54 Completely. This is the cap 57 over the further application element 54 slipped. This is the further application element 54 protected during transport and during storage. In addition, the outlet 47 by means of the cap 57 locked. The cap 57 is in the area of the cannula section 14 attached to this and detachable with the cannula section 14 or the cartridge 53 connected.

12 shows a side view of the cartridge according to the invention 53 to 10 with the other application element 54 and a withdrawn cap 57 , In this embodiment, the further application element 54 coating area 48 and surveys 49 on. Here are the surveys 49 for releasably locking the cap 57 with the cartouche 53 ,

13 shows a first schematic flow diagram for a first inventive method. In a step S10, the method of manufacturing a cartridge 10 . 27 . 30 . 45 . 50 . 53 started. Then, in a step S11, the production of a first component takes place in a 2-component injection molding process. Here is the functional element 15 . 46 . 51 . 54 manufactured as the first component.

Subsequently, in a step S12, a second component is produced in the 2-component injection molding process, in which case a cartridge housing 44 consisting of the reservoir 11 , the cannula section 14 and the cartridge base 19 as the second component is made. For example, the second component can be produced or sprayed at least partially around the first component.

In the case of the functional element 15 is around the plug part 16 of the functional element 15 around the cannula section 14 producible, with the plug part 16 the cannula canal 24 completely filled out. The plug part 16 is positively and frictionally engaged in the cannula channel 24 held. Here, the connection between the peripheral surface of the plug part 16 and the inner surface of the cannula channel 24 solvable. For closing the cannula section 14 has the functional element 15 exclusively the cylindrical plug part 16 having an outer diameter equal to the inner diameter of the cannula channel 24 corresponds and within the cannula channel 24 is arranged. By pulling on the plug part 16 by means of the grip part 17 is the plug part 16 from the cannula canal 24 pulled out.

With a cartouche 45 . 50 . 53 becomes the functional element 46 . 51 . 54 firmly with the cartridge 45 . 50 . 53 connected, wherein a non-destructive release of the functional element 46 . 51 . 54 from the cartouche 45 . 50 . 53 is prevented.

Subsequently, the method can be terminated with a step S15. Alternatively, however, steps S13 and S14 may be performed between step S12 and step S15. Here, in step S13, the cartridge 10 . 27 . 30 . 45 . 50 . 53 automatically filled and then, according to step S14, a piston 38 into the cartouche 10 . 27 . 30 . 45 . 50 . 53 to close the interior 22 of the reservoir 11 introduced. The filling and insertion of the piston 38 take place as based on the 6a to 6f described previously.

Thus, a fully automated manufacturing process for making the cartridge 10 . 27 . 30 . 45 . 50 . 53 realizable.

In addition, due to the design of the functional element 15 with the plug part 16 resealing the cannula channel 24 after a first use of the cartridge 10 . 27 . 30 considerably more difficult compared to previously customary caps. Because of when used for the first time in the cannula channel 24 occurred dental material 36 is an insertion of the plug part 16 in the already with the dental material 36 filled cannula canal 24 significantly impeded or even completely excluded. As a result, the risk of re-use of residues of the dental material 36 after a first use of the cartridge 10 . 27 . 30 considerably reduced.

By means of the functional elements 46 . 51 . 54 is a application and / or massaging a dental material 36 much easier, more effective and more comfortable for a patient.

14 shows a further schematic flow diagram for a method according to the invention. The procedure according to 14 largely corresponds to the method according to 13 , In that regard, reference is also made to the preceding description. Unlike the first method after 13 is according to the further method according to 14 however, provided that in step S11 first the cartridge housing 44 is produced as the first component in a 2-component injection molding process. Subsequently, in step S12, the functional element 15 . 46 . 51 . 54 produced as a second component in a 2-component injection molding process. In the case of the functional element 15 fills this or the plug part 16 the cannula canal 24 only partially off.

LIST OF REFERENCE NUMBERS

10

cartridge

11

reservoir

12

First end

13

Second end

14

cannula section

15

functional element

16

plug member

17

handle part

18

ribs

19

cartridge base

20

Middle area

21

Versteifungsstrebe

22

inner space

23

piston receiving

24

cannula channel

25

vent groove

26

web

27

cartridge

28

forehead

29

opening

30

cartridge

31

twist

32

shell

33

Positive-locking connection

34

wave profile

35

filling pipe

36

Dental material

37

residual volume

38

piston

39

First piston end

40

Second piston end

41

Middle piston area

42

arrow

43

opening

44

cartridge housing

45

cartridge

46

functional element

47

outlet

48

coating area

49

survey

50

cartridge

51

functional element

52

bristles

52.1

first bristles

52.2

second bristles

53

cartridge

54

functional element

55

trough-like extension

56

male member

57

cap

S10

begin

S11

Production of a first component

S12

Preparation of a second component

S13

filling

S14

Kolb introduction

S15

The End

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 4391590 B1 [0002]
• US 6059570 [0003]

Claims (19)

Method for producing a cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) for receiving and metering a flowable dental material ( 36 ) with a reservoir ( 11 ) for receiving the dental material ( 36 ), whereby the reservoir ( 11 ) with a cannula section ( 14 ) for dispensing the dental material ( 36 ) from the reservoir ( 11 ) and with a functional element separate from the function ( 15 . 46 . 51 . 54 ) connected to the cannula section ( 14 ), characterized in that the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) together with the functional element ( 15 . 46 . 51 . 54 ) is produced in a multi-component injection molding process. A method according to claim 1, characterized in that the multi-component injection molding method is designed as a 2-component injection molding method , wherein in a first step, first the functional element ( 15 . 46 . 51 . 54 ) or a cartridge housing ( 44 ) is made of one, in particular first, plastic material and in a subsequent second step, the cartridge housing ( 44 ) or the functional element ( 15 . 46 . 51 . 54 ) is produced from a, in particular from the first plastic material deviating second, plastic material, wherein preferably the functional element ( 15 . 46 . 51 . 54 ) of a thermoplastic elastomer, thermoplastic silicone, thermoplastic polyurethane, liquid silicone or polyolefin and / or the cartridge housing ( 44 ) of polyester, in particular of polybutylene terephthalate or polyethylene terephthalate, polyolefin, in particular polypropylene, polyoxymethylene, polyamide, cyclo-olefin copolymers, cyclo-olefin-copolymer mixtures, polycarbonate, acrylonitrile-butadiene-styrene or styrene polymer. Method according to claim 1 or 2, characterized in that with the functional element ( 15 ) a cannula channel ( 24 ) of the cannula section ( 14 ) is filled at least partially, in particular completely, wherein preferably the functional element ( 15 ) releasably, positively and / or non-positively, in particular by friction, with the cannula portion ( 14 ), in particular in the cannula channel ( 24 ) is arranged. Method according to one of the preceding claims, characterized in that the functional element ( 15 ) is formed as a releasable closure element that a plug part ( 16 ) for closing the cannula portion ( 14 ) and with the plug part ( 16 ) a cannula channel ( 24 ) of the cannula section ( 14 ) is at least partially, in particular completely, filled, wherein preferably the closure element a with the plug part ( 16 ), in particular designed as an information carrier, handle part ( 17 ) outside the cannula section ( 14 ) and / or the cannula channel ( 24 ) Has. Method according to one of claims 1 or 2, characterized in that the functional element ( 46 . 51 . 54 ) as an application element for dispensing and / or applying the dental material ( 36 ), wherein preferably the application element fixed, in particular insoluble, with the cartridge ( 45 . 50 . 53 ) and / or the cartridge housing ( 44 ) is connected. A method according to claim 5, characterized in that the application element of an elastic plastic material, in particular with a hardness in the range of Shore A or Shore D, more preferably in the range of 30 Shore A to 90 Shore A, is produced. A method according to claim 5 or 6, characterized in that with a separate and / or detachable closure element an outlet ( 47 ) of the application element is closed, wherein preferably the separate closure element in an independent manufacturing process independently of the cartridge ( 45 . 50 . 53 ) with the functional element ( 46 . 50 . 53 ), in particular the closure element is designed as a closure cap ( 57 ) formed to close the outlet ( 47 ) is at least partially slipped over the application element. Method according to one of the preceding claims, characterized in that after the manufacture of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) with the functional element ( 15 . 46 . 51 . 54 ) the dental material ( 36 ) through one of the cannula section ( 14 ) facing away from the opening ( 43 ) in the reservoir ( 11 ), in particular automatically, is filled, wherein preferably after filling of the reservoir ( 11 ) a piston ( 38 ) in the opening ( 43 ) for closing the reservoir ( 11 ), in particular automated, is introduced. Cartridge, in particular produced by a method according to one of the preceding claims, for receiving and metering a flowable dental material ( 36 ) with a reservoir ( 11 ) for receiving the dental material ( 36 ), whereby the reservoir ( 11 ) with a cannula section ( 14 ) for dispensing the dental material ( 36 ) from the reservoir ( 11 ) and with a functional element separate from the function ( 15 . 46 . 51 . 53 ), the cannula portion ( 14 ), characterized in that the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) together with the functional element ( 15 . 46 . 51 . 53 ) as a multi-component injection molded part, in particular, a 2-component injection molded part is formed. Cartridge according to claim 9, characterized in that the wall thickness of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) in a cannula section ( 14 ) facing forehead area ( 28 ) of the reservoir ( 11 ) and / or that the wall thickness of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) in a middle area ( 20 ) of the reservoir ( 11 ) is reduced, preferably in the longitudinal direction of the reservoir ( 11 ) extending stiffening struts ( 21 ) in the middle area ( 20 ) are provided with the reduced wall thickness. A cartridge according to claim 9 or 10, characterized in that at one of the cannula portion ( 14 ) facing away from the end ( 13 ) of the reservoir ( 11 ) a cartridge base ( 19 ) for receiving the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) is provided in a dispenser, the cartridge base ( 19 ) an opening ( 43 ) for receiving a movable piston ( 38 ) for closing the reservoir ( 11 ) and for pushing out the dental material ( 36 ) from the reservoir ( 11 ) and on an inner surface of the opening ( 43 ) of the cartridge base ( 19 ) in the direction of displacement of the piston ( 38 ) extending vent grooves ( 26 ) are provided. Cartridge according to one of claims 9 to 11, characterized in that an anti-rotation device ( 31 ) at one of the cannula section ( 14 ) facing away from the cartridge base ( 19 ) and / or on an outside of the reservoir ( 11 ) for preventing a twisting of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) is provided in a dispensing device, wherein preferably the anti-rotation device ( 31 ) a positive connection ( 33 ) for preventing a rotation of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) about the longitudinal axis of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) and / or the anti-twist device ( 31 ) a non-slip sleeve ( 32 ), in particular of a rubber material, which is insertable into a receptacle of the dispensing device, in particular the sleeve ( 32 ) positively to prevent twisting of the sleeve ( 32 ) about the longitudinal axis of the cartridge ( 10 . 27 . 30 . 45 . 50 . 53 ) with the cartridge base ( 19 ) connected. Cartridge according to one of claims 9 to 12, characterized in that for closing the reservoir ( 11 ) and for pushing out the dental material ( 36 ) a movable piston ( 38 ) in the reservoir ( 11 ) located at its the reservoir ( 11 ) and / or the dental material ( 36 ), in particular conical, first piston end ( 39 ) has a first radius corresponding to the inner radius of the reservoir ( 11 ), preferably one from the reservoir ( 11 ) and / or the dental material ( 36 ) facing away from the region of the piston ( 38 ) has a reduced relative to the first radius second radius and / or one of the first piston end ( 39 ) facing away from the second piston end ( 40 ) has another radius corresponding to the first radius. Cartridge according to one of claims 9 to 13, characterized in that the functional element ( 15 ) as a closure element for closing a cannula channel ( 24 ) of the cannula section ( 14 ), wherein the closure element is a detachable, positive and / or non-positive, in particular frictionally engaged, in the cannula channel ( 24 ) held plug part ( 16 ), which has the cannula channel ( 24 ) for closing the cartridge ( 10 . 27 . 30 ) at least partially, in particular completely, preferably, the plug part ( 16 ) at a free end outside the cannula portion ( 14 ) and / or outside the cannula channel ( 24 ), in particular as an information carrier trained, grip part ( 17 ). Cartridge according to one of claims 9 to 13, characterized in that the functional element ( 46 . 51 . 53 ) as an application element for dispensing and / or applying the dental material ( 36 ), wherein preferably the application element fixed, in particular insoluble, with the cartridge ( 45 . 50 . 53 ) and / or the cartridge housing ( 44 ) connected is. Cartridge according to claim 15, characterized in that the application element at least one survey ( 49 ), in particular several surveys ( 49 ), for the releasable setting of a separate closure element on an outer surface of the application element, wherein preferably the application element partially and / or at least one coating region ( 48 ) of the application element on an outer side of the cartridge ( 45 . 50 . 53 ) and / or the cannula section ( 14 ) is arranged. Cartridge according to Claim 15 or 16, characterized in that the application element has an outlet ( 47 ) for dispensing and / or applying the dental material ( 36 ), wherein the outlet ( 47 ) has a rectangular, square, round or oval cross-section, in particular the application element has a to the outlet ( 47 ), in particular conical, narrowing or widening shape. Cartridge according to one of claims 15 to 17, characterized in that the application element bristles ( 52 ), wherein preferably the bristles ( 52 ) from the outlet ( 47 ), in particular parallel to one another and / or in the axial direction to a longitudinal axis of a cannula channel ( 24 ), extend away and / or all Bristles ( 52 ) are the same or at least partially deviating from each other in terms of their length and / or their diameter. Cartridge according to one of claims 15 to 18, characterized in that the application element is a from its outlet ( 47 ) extending channel-like extension ( 55 ), in particular for dispensing the dental material ( 36 ) in a cavity and / or tooth pocket, in particular, has the channel-like extension ( 55 ) at its free end, particularly preferably obtuse, plug-in part ( 56 ) for insertion into a cavity and / or tooth pocket, wherein preferably the male part ( 56 ) in the direction of the outlet ( 47 ) and extended in terms of its width.

Images