# US 2019/0167390 A1 · Cartridge for storing, discharging and applying a dental compound > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167390 A1 - Document ID: US20190167390A1 - Status: Published application - Kind: A1 - Application number: 16/324,847 - Filed: 2017-08-08 - Published: 2019-06-06 - Earliest claimed: 2016-08-12 - Assignees: Muhlbauer Technology GmbH - Applicants: Muhlbauer Technology GmbH - Inventors: Steffen EFFENBERGER; Axel NOWAK - Web page: https://patentgrep.com/patent/US20190167390A1 ## CPC - A61C 9/0026: {Syringes or guns for injecting impression material; Mixing impression material for immediate use} - A61C 5/62: Applicators, e.g. syringes or guns - A61C 5/66: Capsules for filling material - A61C 9/0033: {Gingival retraction appliances} - A61C 19/063: {Medicament applicators for teeth or gums, e.g. treatment with fluorides} - A61J 1/00: Containers specially adapted for medical or pharmaceutical purposes (capsules or the like for oral use A61J3/07; specially adapted for surgical or diagnostic appliances or instruments A61B50/30; containers for radioactive substances G21F5/00) - A61M 2005/341: {angularly adjustable or angled away from the axis of the injector} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract The invention relates to a cartridge for storing, discharging and applying a dental compound, in particular a paste for preparing and drying the gingival sulcus (sulcus gingivae) during dental impression taking. The invention relates to a cartridge (1) for storing, discharging and applying a dental compound, comprising a container (2), which has a hollow chamber (4) for accommodating the dental compound, and a cannula (3). The hollow chamber (4) comprises an outlet opening (5) and an actuator opening (6) opposite the outlet opening (5), and the cannula (3) is fluid-connected to the outlet opening (5), is arranged on the container (2) and is straight in the starting state. The cartridge is characterised in that the cannula (3) is made of plastic and is plastically deformable under standard conditions with the application of manual force in such a manner that a permanent bend by an angle of at least up to 65° in comparison with the starting state can be achieved without buckling the cannula (3). ## Claims ### Claim 1 A cartridge (1) for storing, discharging and applying a dental compound, comprising a container (2), which has a hollow chamber (4) for accommodating the dental compound, and a cannula (3), wherein the hollow chamber (4) comprises an outlet opening (5) and an actuator opening (6) opposite the outlet opening (5), and the cannula (3) is arranged on the container (2) in such a way as to be fluid-connected to the outlet opening (5), and is straight in the initial state, characterized in that the cannula (3) is made of plastic and is plastically deformable in such a manner under standard conditions, with the application of manual force, that a permanent bend by an angle of at least up to 65° in comparison with the initial state can be achieved without buckling of the cannula (3). ### Claim 2 (depends on 1) The cartridge as claimed in claim 1, characterized in that the bend in the cannula (3) is reversed as the dental compound is dispensed from the hollow chamber (4) with a squeezing force of less than 130 N, preferably of less than 150 N, further preferably of less than 200 N by no more than 10°, preferably by no more than 5°, further preferably being reversed by no more than 1°. ### Claim 3 The cartridge as claimed in one of the preceding claims, characterized in that, at 23° C., the plastic of the cannula (3) has a bending modulus of from 2.2 to 2.9 GPa, preferably of from 2.3 to 2.6 GPa, preferably of about 2.4 GPa, in accordance with DIN EN ISO 178:2013. ### Claim 4 The cartridge as claimed in one of the preceding claims, characterized in that the outlet opening (5) and the actuator opening (6) of the hollow chamber (4) lie on a common axis (7), wherein the cannula (3) preferably extends parallel to or along the axis (7) in the initial state. ### Claim 5 The cartridge as claimed in one of the preceding claims, characterized in that the cannula (3) is formed integrally with the container (2), wherein the cannula (3) is preferably produced together with the container (2) by 1-component or multicomponent injection molding. ### Claim 6 The cartridge as claimed in one of the preceding claims, characterized in that the cannula (3) and/or the container (2) is made from a thermoplastic, preferably a substantially amorphous thermoplastic copolymer, terpolymer and/or quadropolymer, further preferably a partially cross-linked, substantially amorphous thermoplastic copolymer, terpolymer or quadropolymer, further preferably from acrylonitrile butadiene styrene (ABS). ### Claim 7 (depends on 6) The cartridge as claimed in claim 6, characterized in that the thermoplastic contains pigments and/or fillers, wherein the proportion of pigments and/or fillers is preferably less than 50% by weight, further preferably less than 30% by weight. ### Claim 8 The cartridge as claimed in one of the preceding claims, characterized in that the cartridge (1) is designed for use with a standard dispenser. ### Claim 9 The cartridge as claimed in one of the preceding claims, characterized in that a piston (8) is provided in the hollow chamber (4), said piston being arranged in such a way in the initial state of the cartridge (1) that a dental compound can be accommodated in the hollow chamber (4) between the piston (8) and the outlet opening (5). ### Claim 10 The cartridge as claimed in one of the preceding claims, characterized in that the outlet opening (10) of the cannula (3) has an inside diameter of from 0.4 mm to 2 mm, preferably 0.6 mm to 0.9 mm, wherein the outlet end of the cannula (3) is preferably rounded, preferably with a radius of from 0.5 mm to 1.5 mm. ### Claim 11 The cartridge as claimed in one of the preceding claims, characterized in that the flexible region of the cannula (3) has a length of from 15 mm to 25 mm, preferably of about 20 mm. ### Claim 12 The cartridge as claimed in one of the preceding claims, characterized in that the container (2) is substantially tubular, has an outside diameter of from 6 mm to 7 mm, preferably of from 6.2 mm to 6.6 mm, and has a wall thickness of at least 0.5 mm, preferably at least 0.9 mm and/or a wall thickness of less than 1.5 mm, preferably less than 1.0 mm. ### Claim 13 The cartridge as claimed in one of the preceding claims, characterized in that the container (2) has an annular enlargement of the outside diameter (9) in the region of the outlet opening (5) and/or of the actuator opening (6). ### Claim 14 The cartridge as claimed in one of the preceding claims, characterized in that the hollow chamber (4) of the container (2) is filled substantially by a pasty dental compound, wherein the dental compound is preferably an astringent retraction paste. ### Claim 15 (depends on 13) The cartridge as claimed in claim 13, characterized in that the dental compound comprises a liquid and a proportion of fillers greater than 50% by weight. ### Claim 16 (depends on 13, 14) The cartridge as claimed in claim 13 or 14, characterized in that the dental compound contains a strong acid (pKs≤2), in particular HCl.