# US 12,178,673 B2 · Shade matching dental composite > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,673 B2 - Document ID: US12178673B2 - Status: Granted - Kind: B2 - Application number: 17/004,977 - Filed: 2020-08-27 - Published: 2021-03-04 - Granted: 2024-12-31 - Earliest claimed: 2019-08-29 - Applicants: Joseph F. Bringley - Inventors: Joseph F. Bringley - Web page: https://patentgrep.com/patent/US12178673B2 ## CPC - A61C 13/082: {Cosmetic aspects, e.g. inlays; Determination of the colour (A61C19/10 takes precedence)} - A61K 6/16: Refractive index - A61K 6/17: Particle size - A61K 6/62: Photochemical radical initiators - A61K 6/71: Fillers - A61K 6/887: Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds - A61K 6/80: Preparations for artificial teeth, for filling teeth or for capping teeth - 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) - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) ## Abstract A dental composite or coating that comprises at least one photopolymerizable resin, at least one inorganic filler, a photoinitator, and at lease one interference platelet. The dental composite is able to adapt and match the color and shade of adjacent tooth structure in the cavity in which it is placed, without the need for conventional dyes and pigments, although it may be desirable to use dyes and pigments in a specific shade series. ## Claims ### Claim 1 A curable dental composition comprising a photocurable resin, at least one filler, a photoinitiator and at least one interference platelet to form a translucent composite in a colored cavity surrounding said composite, wherein said translucent composite mimics the color of said surrounding cavity, wherein the at least one filler and the photocurable resin both have refractive indices and the difference between the refractive index of the filler and the refractive index of the photocurable resin after curing is not greater than 0.03. ### Claim 2 (depends on 1) The curable dental composition of claim 1, wherein said curable dental composition is a disk having a thickness of 1 mm and a contrast ratio of between 40 and 85. ### Claim 3 (depends on 1) The curable dental composition of claim 1, wherein said curable dental composition is a disk having a thickness of 1 mm and a contrast ratio of between 55 and 75. ### Claim 4 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet is reflective or scattering in the visible region of a spectrum. ### Claim 5 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet is reflective or scattering in the red and green region of a spectrum. ### Claim 6 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet is reflective or scattering in the red and yellow region of a spectrum. ### Claim 7 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet has a mean particle diameter between 5 and 100 microns. ### Claim 8 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet has a mean particle diameter between 5 and 50 microns. ### Claim 9 (depends on 1) The curable dental composition of claim 1 wherein the filler has a refractive index that is less than the refractive index of the photocurable resin after curing. ### Claim 10 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet comprises less than 2500 parts per million of said curable dental composition. ### Claim 11 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet comprises between 100 and 1500 part per million of said curable dental composition. ### Claim 12 (depends on 11) The curable dental composition of claim 11 wherein the said filler comprises at least 50% silica, and wherein at least a portion of the silica has a primary particles size greater than 30 nm. ### Claim 13 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet(s) is/are chosen such that they match dental A shades from a classical shade guide. ### Claim 14 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet(s) is/are chosen such that they match dental C shades from a classical shade guide. ### Claim 15 (depends on 1) The curable dental composition of claim 1, wherein the at least one interference platelet(s) is/are chosen such that they match dental D shades from a classical shade. ### Claim 16 (depends on 1) The curable dental composition of claim 1, wherein said at least one interference platelet is a microparticle whose thickness is selected such that it reflects or scatters specific colors or wavelengths of light. ### Claim 17 (depends on 1) The curable dental composition of claim 1, wherein said at least one interference platelet is a layer like structure of two or more materials. ### Claim 18 (depends on 1) The curable dental composition of claim 1, wherein said at least one interference platelet has a diameter of 5-100 microns, a thicknesses of less than one micron and is chosen to form an interference pattern with actinic radiation. ### Claim 19 A curable dental composition comprising a photocurable resin, at least one filler, a photoinitiator and at least one interference platelet to form a translucent composite in a colored cavity surrounding said composite, wherein said translucent composite mimics the color of said surrounding cavity, wherein the at least one interference platelet comprises between 100 and 1500 part per million of said curable dental composition, wherein the said filler comprises at least 50% silica, and wherein at least a portion of the silica has a primary particles size greater than 30 nm. ### Claim 20 (depends on 1) The curable dental composition of claim 1, wherein said curable dental composition is a disk having a thickness of 1 mm and a contrast ratio of between 40 and 85.