# US 11,439,480 B2 · Elastic matrix system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,480 B2 - Document ID: US11439480B2 - Status: Granted - Kind: B2 - Application number: 16/375,155 - Filed: 2019-04-04 - Published: 2020-10-08 - Granted: 2022-09-13 - Earliest claimed: 2019-04-04 - Assignees: Smile Builders Innovations LLC - Applicants: Robyn B. Lesser - Inventors: Robyn B. Lesser - Web page: https://patentgrep.com/patent/US11439480B2 ## 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 An elastic matrix system for use during a dental restoration process is provided. In one embodiment, among others, the matrix system may include a restoration band having an elongated body between a first end and a second end. The restoration band comprises a top edge and a bottom edge. The matrix system also includes an upper circular rim of elastic material that has a first channel. The top edge of the restoration band is positioned in the first channel, and the restoration band expands and contracts a circumference of the matrix system along the first channel as the upper circular rim is manipulated. The matrix system also includes a lower circular rim of elastic material that has a second channel. The elastic sleeve attaches the upper circular rim to lower circular rim. ## Claims ### Claim 1 An apparatus for use when performing a dental restoration process, comprising: a restoration band having an elongated body between a first end and a second end, the elongated body having a top edge and a bottom edge and conforming to a circular shape configured to surround a tooth; an upper circular rim of elastic material that has a first channel, wherein the top edge of the restoration band is positioned in the first channel, an expansion and contraction of the upper circular rim causes the restoration band to uncoil and coil, and the uncoiling and coiling of the restoration band causes a first diameter of the restoration band along the first channel to expand and contract; a lower circular rim of elastic material that has a second channel, wherein the bottom edge of the restoration band is positioned in the second channel, an expansion and contraction of the lower circular rim causes the restoration band to uncoil and coil, and the uncoiling and coiling of the restoration band causes a second diameter of the restoration band along the second channel to expand and contract; and an elastic sleeve that attaches the upper circular rim to the lower circular rim with the restoration band extending therebetween the upper circular rim and the lower circular rim, wherein a portion of the restoration band passes through the elastic sleeve. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the elastic sleeve comprises a first elastic sleeve, and the apparatus further comprises a second elastic sleeve that is diametrically opposed along a circumference of the apparatus. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the first elastic sleeve comprises a first exterior loop, and the second elastic sleeve comprises a second exterior loop. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein a first opening of the first elastic sleeve is about perpendicular to a second opening of the first exterior loop. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the lower circular rim of elastic material comprises a top portion and a bottom portion, wherein the lower circular rim has a tapered shape in which the top portion has a larger circumference than the bottom portion. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the restoration band comprises a matrix band or a stainless steel matrix band. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the tooth is a posterior tooth, and a length of the apparatus substantially corresponds to a length of a crown of the posterior tooth being operated on for dental restoration. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the lower circular rim of elastic material or the upper circular rim of elastic material is comprised of a rubber material. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein a thickness of the lower circular rim of elastic material can be manipulated to a contracted state by a compressed force. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the thickness of the lower circular rim of elastic material can expand from the contracted state after the compressed force has been released. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the lower circular rim of elastic material has a top portion that includes an outer annular rim that has a larger diameter than a bottom portion of the lower circular rim. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the first channel of the upper circular rim and the second channel of the lower circular rim are substantially in vertical alignment. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the lower circular rim comprises an exterior annular rim.