Dental appliance with repositioning jaw elements

Patent metadata

Field	Value
Publication number	US-11633261-B2
Application number	US-202016745980-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Feb 21, 2014
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The present disclosure provides method, computing device readable medium, and devices for dental appliances with repositioning jaw elements. An example of a method can include identifying a misaligned jaw of a patient from a virtual image of the patient's jaw, providing a treatment plan for the patient including a virtual model of a dental appliance having a first shell and a second shell configured to reposition at least one tooth of the patient, and adjusting the position of the repositioning jaw elements on the first shell and the second shell to comply with a number of constraints. The virtual model of the dental appliance including repositioning jaw elements on the first shell and the second shell configured to move a position of the misaligned jaw of the patient.

First claim

What is claimed is:

1. A non-transitory computing device readable medium storing instructions executable by a processor to cause a computing device to perform a method, the method comprising:
scanning the patient's dentition with a scanner to form a virtual image of the patient's jaw;
generating a virtual model of the jaw based on the virtual image;
identifying a jaw position of a misaligned jaw of a patient from the virtual image of the patient's jaw;
providing a treatment plan for the patient, the treatment plan including instructions to apply tooth repositioning forces to reposition at least one tooth of the patient and to apply jaw repositioning forces to modify the jaw position of the misaligned jaw;
generate virtual representations of a first repositioning jaw element and a second repositioning jaw element;
virtually modeling application of the jaw repositioning forces between the first repositioning jaw element and the second repositioning jaw element to obtain a virtual model of the application of the jaw repositioning forces on the virtual model of the patient's jaw;
identifying one or more constraints limiting the application of the jaw repositioning forces to the misaligned jaw, based on the virtual model of the application of the jaw repositioning forces; and
providing adjustment instructions to adjust the first repositioning jaw element and the second repositioning jaw element to accommodate the one or more constraints.

2. The non-transitory computing device readable medium of claim 1 , wherein the one or more constraints include physical limitations or restrictions of a placement and an orientation of the repositioning jaw elements in relation to a current tooth arrangement, a current jaw position, and a predicted corrected jaw position of the patient.

3. The non-transitory computing device readable medium of claim 1 , wherein the one or more constraints include a slant of an interface between a first surface of the first repositioning jaw element and a second surface of the second repositioning jaw element are within a threshold degree of parallel to an occlusal plane normal of the patient.

4. The non-transitory computing device readable medium of claim 1 , wherein the number of constraints include the repositioning jaw elements crisscross when viewed posteriorly or anteriorly.

5. The non-transitory computing device readable medium of claim 1 , wherein the adjustment instructions satisfy the greatest subset of the one or more constraints to optimize placement of the repositioning jaw elements.

6. The non-transitory computing device readable medium of claim 1 , wherein identifying the jaw position includes identifying one of a plurality of virtual jaw positions of a virtual model of the jaw of the patient between incremental treatment stages of the treatment plan.

7. The non-transitory computing device readable medium of claim 1 , further comprising modifying the treatment plan to accommodate the adjustment instructions.

8. The non-transitory computing device readable medium of claim 1 , further comprising: providing instructions to model the one or more constraints on the virtual model of the patient's jaw.

9. The non-transitory computing device readable medium of claim 1 , wherein the method further comprises providing a plurality of virtual models of dental appliances for each stage of the treatment plan.

10. The non-transitory computing device readable medium of claim 9 , wherein the method further comprises adjusting the position of the virtual representations of the first and second repositioning jaw elements at one or more intermediate stages of the plurality of stages of the treatment plan.

11. A method comprising:
scanning the patient's dentition with a scanner to form a virtual image of the patient's jaw;
generating a virtual model of the jaw based on the virtual image;
identifying a jaw position of a misaligned jaw of a patient from the virtual image of the patient's jaw;
providing a treatment plan for the patient, the treatment plan including instructions to apply tooth repositioning forces to reposition at least one tooth of the patient and to apply jaw repositioning forces to modify the jaw position of the misaligned jaw;
generate virtual representations of a first repositioning jaw element and a second repositioning jaw element;
virtually modeling application of the jaw repositioning forces between the first repositioning jaw element and the second repositioning jaw element to obtain a virtual model of the application of the jaw repositioning forces on the virtual model of the patient's jaw;
identifying one or more constraints limiting the application of the jaw repositioning forces to the misaligned jaw, based on the virtual model of the application of the jaw repositioning forces; and
providing adjustment instructions to adjust the first repositioning jaw element and the second repositioning jaw element to accommodate the one or more constraints.

12. The method of claim 11 , wherein the one or more constraints include physical limitations or restrictions of a placement and an orientation of the repositioning jaw elements in relation to a current tooth arrangement, a current jaw position, and a predicted corrected jaw position of the patient.

13. The method of claim 11 , wherein the one or more constraints include a slant of an interface between a first surface of the first repositioning jaw element and a second surface of the second repositioning jaw element are within a threshold degree of parallel to an occlusal plane normal of the patient.

14. The method of claim 11 , wherein the number of constraints include the repositioning jaw elements crisscross when viewed posteriorly or anteriorly.

15. The method of claim 11 , wherein the adjustment instructions satisfy the greatest subset of the one or more constraints to optimize placement of the repositioning jaw elements.

16. The method of claim 11 , wherein identifying the jaw position includes identifying one of a plurality of virtual jaw positions of a virtual model of the jaw of the patient between incremental treatment stages of the treatment plan.

17. The method of claim 11 , further comprising modifying the treatment plan to accommodate the adjustment instructions.

18. The method of claim 11 , further comprising: modeling the one or more constraints on the virtual model of the patient's jaw.

19. The method of claim 11 , further comprising providing a plurality of virtual models of dental appliances for each stage of the treatment plan.

20. The method of claim 19 , further comprising adjusting the position of the virtual representations of the first and second repositioning jaw elements at one or more intermediate stages of the plurality of stages of the treatment plan.

Assignees

• Align Technology Inc

Inventors

• Wu Ken
• Kuo Eric E
• Derakhshan Mitra
• Tjhia Crystal
• Yau Eric
• Boronkay Allen R
• Li Chunhua
• Krivovyaz Gleb

Classifications

• A61C7/36

  Devices acting between upper and lower teeth · CPC title

• A61C7/002

  Orthodontic computer assisted systems · CPC title

• A61C7/08 Primary

  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)} · CPC title