# US 5,707,235 A · Dental tray spacer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,707,235 A - Document ID: US5707235A - Status: Granted - Kind: A - Application number: 08/415,493 - Filed: 1995-04-03 - Granted: 1998-01-13 - Earliest claimed: 1995-04-03 - Inventors: Eric J. Knutson - Web page: https://patentgrep.com/patent/US5707235A ## CPC - A61C 19/063: {Medicament applicators for teeth or gums, e.g. treatment with fluorides} - A61C 19/066: {Bleaching devices; Whitening agent applicators for teeth, e.g. trays or strips} - 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 convenient dental tray spacer for use in forming a thin reservoir space between teeth and a dental tray, during tray fabrication. Shim (10) segments are connected by small links (12) to form a spacer (16). The lengths of the links are readily variable. Retention to the teeth is provided by adhesive on rear adhesive surfaces (22). Alternatively, an elastic loop (24) can retain a spacer (16'). Spacer (16), or spacer (16'), remain on the teeth while the dental tray is formed, and then is pulled free from inside the formed dental trays. ## Claims ### Claim 1 A preformed dental tray spacer means for shimming moldable dental tray material a predetermined distance from surfaces of teeth of a dental arch, or models thereof, comprising a flat, unitary strip of a deformable material substantially elongate in a longitudinal direction and adaptable for rapid shaping and mounting on said surfaces of teeth, or models thereof, said unitary strip comprising a plurality of tooth shim elements connected to each other by means of links, said tooth shim elements having a circumference in the plane of the unitary strip, each said tooth shim element being comformable overlying surface contours of a tooth, said links being substantially elongate, a portion of said links being substantially elongate in the longitudinal direction of said unitary strip, said links having a sufficient length such that adjacent said tooth shim elements are mountable on adjacent said surfaces of teeth, wherein said circumference of said tooth shim elements is substantially greater than the width of said links. ### Claim 2 (depends on 1) The dental tray spacer means of claim 1, wherein said sufficient length is such that adjacent said tooth shim elements are mountable on adjacent said surfaces of teeth, or models thereof, said surfaces of teeth being substantially misaligned. ### Claim 3 (depends on 1) The dental tray spacer means of claim 1, wherein a portion of said links are further connected to said spacer by means of a separable connection, whereby separating said separable connection increases utilizable said sufficient length, such that adjacent said tooth shim elements are mountable on adjacent said surfaces of teeth, or models thereof, said surfaces of teeth being substantially misaligned, wherein the connected distance between said tooth shim elements is increased. ### Claim 4 (depends on 1) The dental tray spacer means of claim 1, wherein each of said tooth shim elements have distinct circumferential shapes, and said teeth have distinct circumferential shapes, and said circumferential shapes of said tooth shim elements substantially resemble said circumferential shapes of respective said teeth upon which each of said tooth shim elements would be mounted. ### Claim 5 (depends on 1) The dental tray spacer means of claim 1, wherein said tooth shim elements have a surface for mounting against said surfaces of teeth, or models thereof, said surface of said tooth shim element being coated with an adhesive. ### Claim 6 A preformed dental tray spacer means for shimming moldable dental tray material a predetermined distance from surfaces of teeth of a dental arch, or models thereof, comprising a flat, unitary strip of a deformable material substantially elongate in a longitudinal direction and adaptable for rapid shaping and mounting on said surfaces of teeth, or models thereof, said unitary strip comprising a plurality of tooth shim elements connected to each other by means of links, said tooth shim elements having a circumference in the plane of the unitary strip, each said tooth shim element being comformable overlying surface contours of a tooth, said links being substantially elongate, a portion of said links being substantially elongate in the longitudinal direction of said unitary strip, said links having a sufficient length such that adjacent said tooth shim elements are mountable on adjacent said surfaces of teeth, wherein said circumference of said tooth shim elements is substantially greater than the width of said links, wherein a portion of said links are further connected to said spacer by means of a separable connection, whereby separating said separable connection increases utilizable said sufficient length, such that adjacent said tooth shim elements are mountable on adjacent said surfaces of teeth, or models thereof, said surfaces of teeth being substantially misaligned, wherein the connected distance between said tooth shim elements is increased. ### Claim 7 (depends on 6) The dental tray spacer means of claim 6, wherein said separable connection is a thin membrane. ### Claim 8 (depends on 6) The dental tray spacer means of claim 6, wherein said separable connection connects said links to said tooth shim elements. ### Claim 9 (depends on 6) The dental tray spacer means of claim 6, wherein each of said tooth shim elements have distinct circumferential shapes, and said teeth have distinct circumferential shapes, and said circumferential shapes of said tooth shim elements substantially resemble said circumferential shapes of respective said teeth upon which each of said tooth shim elements would be mounted. ### Claim 10 (depends on 6) The dental tray spacer means of claim 6, wherein said tooth shim elements have a surface for mounting against said surfaces of teeth, or models thereof, said surface of said tooth shim elements being coated with an adhesive. ### Claim 11 A preformed dental tray spacer means for shimming dental tray material a predetermined distance from preferred surfaces of dental arch model teeth, comprising a plurality of tooth shim elements connected by links of variable length, said links comprised of elastic material, wherein one said link is of sufficient length to stretchingly encompass the circumference of a dental model, such that said tooth shim elements are retainably pulled against said surfaces of said teeth; wherein remaining said links stretch sufficiently to permit rapid positioning of said shims against said surfaces of said teeth. ### Claim 12 (depends on 11) The dental tray spacer means of claim 11, wherein each of said tooth shim elements have distinct circumferential shapes, and said teeth have distinct circumferential shapes, and said circumferential shapes of said tooth shim elements substantially resemble said circumferential shapes of respective said teeth upon which each of said tooth shim elements would be mounted. ### Claim 13 (depends on 11) The dental tray spacer means of claim 11, wherein said tooth shim elements have a surface for mounting against said teeth, said surface being coated with an adhesive.