Activatable dental appliance

• US 8,469,706 B2
• Filed: 12/08/2010
• Issued: 06/25/2013
• Est. Priority Date: 12/06/2007
• Status: Active Grant

• Current Assignee: Align Technology Incorporated
• Original Assignee: Align Technology Incorporated
• Inventors: Kuo, Eric
• Primary Examiner(s): Rodriguez, Cris L
• Assistant Examiner(s): ROSEN, ERIC J
• Application Number:
  US12/963,447
• Publication Number:
  US 20110077768A1
• Time in Patent Office: 930 Days
• Field of Search: 433/6, 433/18, 433/24
• US Class Current: 433/24
• CPC Class Codes: A61C 7/08 Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch arch-shaped medicament applicators for teeth or gums A61C19/063; mouthguards for protecting the teeth of sportsmen A63B71/085

Abstract

An activatable dental appliance. A concave trough conforms to a plurality of teeth when placed over the plurality of teeth. A first force applying region is configured to apply a first force to at least one tooth of the plurality of teeth for repositioning the tooth. A second force applying region is configured to be selectively activated, wherein when selectively activated the second force applying region applies a force to at least one tooth of the plurality of teeth.

Claims

1. A computer-implemented method for fabricating a dental appliance for repositioning at least one tooth, the method comprising:

creating a computer-generated model of a patient'"'"'s teeth;

creating a plurality of intermediate digital data sets representing a plurality of successive incremental tooth arrangements of the patient'"'"'s teeth wherein each of the plurality of successive incremental tooth arrangements comprise at least one tooth repositioned from another of the plurality of successive incremental tooth arrangements;

merging at least two sequential of the plurality of intermediate digital data sets to create a merged digital data set;

using the merged digital data set to create a three-dimensional digital model of the dental appliance; and

using the three-dimensional digital model of the dental appliance to fabricate the appliance, the appliance comprising a shell having teeth receiving cavities shaped to receive and apply a resilient force to the patient'"'"'s teeth, at least one tooth receiving cavity of the shell comprising a passive bump formed at a predetermined location in the cavity and configured to deliver one or more predetermined forces to a tooth received in the at least one cavity, the bump comprising a non-activated first state where the bump extends outward and away from the at least one cavity, and an activated second state where the bump extends inward toward the at least one cavity so as to contact and apply a predetermined tooth movement force to a received tooth, the bump transitionable between the first state and second state in response to a user-applied pressure.

2. The computer-implemented method of claim 1, wherein the passive bump has a size, shape, and location selected to apply the one or more predetermined forces.

3. The computer-implemented method of claim 1, wherein the shape of the passive bump in the activated state is substantially the same as the shape of the passive bump in the non-activated state.

4. The computer-implemented method of claim 1, wherein the passive bump provides a radial length that is substantially the same in the activated state and non-activated state.

5. The computer-implemented method of claim 1, wherein the passive bump has a concave or dome shape in the activated state and the non-activated state.

6. The computer-implemented method of claim 1, wherein the at least one cavity is configured to apply a first force when the bump is in the non-activated state and a second force when the bump is in the activated state.

7. The computer-implemented method of claim 1, wherein the shell comprises a plurality of different force applying regions.

8. The computer-implemented method of claim 7, wherein the at least one cavity comprises a plurality of force applying regions.

9. The computer-implemented method of claim 7, wherein the dental appliance comprises at least two force applying regions proximate to each other.

10. The computer-implemented method of claim 7, wherein the dental appliance comprises at least two force applying regions disposed in the at least one cavity generally opposite each other.

11. The computer-implemented method of claim 1, wherein the bump is operable for activation by an activation tool.

12. The computer-implemented method of claim 1, wherein the bump is operable for activation by a user'"'"'s finger.

13. The computer-implemented method of claim 1, wherein the bump is operable for activation by distorting a portion of the appliance proximate the bump of the at least one cavity.

14. The computer-implemented method of claim 1, wherein the at least one cavity is configured to elicit a rotation, translate, tilt, impound, or extract movement.

15. The computer-implemented method of claim 1, wherein the at least one cavity comprises a first force applying region residing on a buccal side of the at least one cavity and a second force applying region residing on a lingual side of the at least one cavity.

16. The computer-implemented method of claim 1, wherein the at least one cavity comprises a first force applying region residing adjacent to a gingiva region of the at least one cavity and a second force applying region resides adjacent to a cusp region of the cavity.

17. The computer-implemented method of claim 1, wherein the dental appliance comprises a relief portion space for accommodating tooth movement in response to contact force applied to a tooth received by the at least one tooth receiving cavity.

18. The computer-implemented method of claim 17, wherein the relief portion is on a side of the at least one cavity opposite to a side of the cavity having the bump.