# US 12,213,854 B2 · Dental matrix for restoring a tooth > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,854 B2 - Document ID: US12213854B2 - Status: Granted - Kind: B2 - Application number: 17/722,774 - Filed: 2022-04-18 - Published: 2022-12-08 - Granted: 2025-02-04 - Earliest claimed: 2021-06-07 - Assignees: Farda Holdings Ltd. - Applicants: Farda Holdings Ltd. - Inventors: Mohammad Reza Nouri - Web page: https://patentgrep.com/patent/US12213854B2 ## CPC - A61C 5/85: Filling bands, e.g. matrix bands; Manipulating tools therefor - 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) ## Abstract A dental matrix for restoring a tooth of a patient which include an occlusal ring configured to biasly fit over a tooth area of the patient. The occlusal ring may have two terminus ends with one of the ends terminating adjacent a buccal surface of the tooth area and the other end terminating adjacent a lingual surface of the tooth area. A pair of arms, each having a distal and a proximal end, may be included with the proximal ends respectively connected to each of the two terminus ends. The pair of arms may each extend at the distal ends towards the tooth to be restored. Engagers may be included to respectively connected to each of the distal ends of the arms for respectively engaging the buccal and lingual surfaces of the tooth to be restored. ## Claims ### Claim 1 A dental matrix for use over a tooth area of a patient in restoring a tooth of the patient comprising: an occlusal ring configured to biasly fit over the tooth area of the patient, said occlusal ring being substantially omega-shaped with two terminus ends, one of said ends configured to terminate adjacent a buccal surface of the tooth area and said other end configured to terminate adjacent a lingual surface of the tooth area; a pair of arms each having a distal and a proximal end, said proximal ends respectively connected to each of said two terminus ends, said pair of arms each configured to extend in a first direction away from and perpendicular to said terminus ends and curving in a second direction perpendicular to the first direction at said distal ends towards the tooth; and an engager respectively connected to each of said distal ends of said arms, said engager each configured for respectively engaging said buccal and lingual surfaces of the tooth; wherein the pair of arms extend below a gingival line of the patient when the dental matrix is set over the tooth area of the patient. ### Claim 2 (depends on 1) The dental matrix of claim 1 wherein said pair of arms are each arc-shaped. ### Claim 3 (depends on 1) The dental matrix of claim 1 wherein each of said arms adjacent said proximal ends configured to extends away from a gingival of the patient and wherein each of said arms adjacent said distal ends configured to extends towards said gingival of the patient. ### Claim 4 (depends on 1) The dental matrix of claim 1 wherein said occlusal ring, said pair of arms and said respective engagers are integrally formed. ### Claim 5 (depends on 1) The dental matrix of claim 1 wherein each of said respective engagers comprises a plate. ### Claim 6 (depends on 5) The dental matrix of claim 5 wherein each of said plates is configured to rotate about said respective arm to flushly engage, respectively, said buccal and lingual surfaces of the tooth. ### Claim 7 A dental matrix for use over a tooth area of a patient in restoring a tooth of the patient comprising: an occlusal ring configured to biasly fit over the tooth area of the patient, said occlusal ring having two terminus ends, one of said ends configured to terminate adjacent a buccal surface of the tooth area and said other end configured to terminate adjacent a lingual surface of the tooth area; a pair of arms each having a distal and a proximal end, said proximal ends respectively connected to each of said two terminus ends, said pair of arms each configured to extend in a first direction away from and perpendicular to said terminus ends and curving in a second direction perpendicular to the first direction at said distal ends towards the tooth; and an engager respectively connected to each of said distal ends of said arms, said engager each configured for respectively engaging said buccal and lingual surfaces of the tooth; wherein the pair of arms extend below a gingival line of the patient when the dental matrix is set over the tooth area of the patient. ### Claim 8 (depends on 7) The dental matrix of claim 7 wherein said pair of arms are each arc-shaped. ### Claim 9 (depends on 7) The dental matrix of claim 7 wherein said occlusal ring is substantially hoop-shaped with said two terminus ends curving towards a gingival of the patient. ### Claim 10 (depends on 7) The dental matrix of claim 7 wherein said occlusal ring is substantially omega-shaped with said two terminus ends configured to extend away from a gingival of the patient. ### Claim 11 (depends on 7) The dental matrix of claim 7 wherein each of said arms adjacent said proximal ends configured to extends away from a gingival of the patient and wherein each of said arms adjacent said distal ends configured to extends towards said gingival of the patient. ### Claim 12 (depends on 7) The dental matrix of claim 7 wherein said occlusal ring is substantially hoop-shaped with, a first section of said two terminus ends curving towards a gingival of the patient, and a second section, after said first section, extending away from said gingival of the patient, wherein each of said arms at said proximal ends extend away from said gingival of the patient and adjacent said proximal ends extend towards said gingival of the patient. ### Claim 13 (depends on 7) The dental matrix of claim 7 wherein said occlusal ring, said pair of arms and said respective engagers are integrally formed. ### Claim 14 (depends on 7) The dental matrix of claim 7 wherein said respective engagers each comprise a plate. ### Claim 15 (depends on 14) The dental matrix of claim 14 wherein each of said plates is configured to rotate about said respective arm to flushly engage, respectively, said buccal and lingual surfaces of the tooth. ### Claim 16 (depends on 7) The dental matrix of claim 7 wherein each of said respective engagers comprises a first plate and a second plate. ### Claim 17 (depends on 16) The dental matrix of claim 16 wherein said distal ends of said arms comprise sub arms, and wherein the first plate and the second plate are connected to said sub arms.