Virtual orthodontic treatment

Patent metadata

Field	Value
Publication number	US-9592103-B2
Application number	US-201615166073-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	Dec 30, 1997
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

A method for virtual orthodontic treatment is provided in which a virtual set of orthodontic components is associated, in a virtual space, with a first virtual three-dimensional image of teeth, and then by a set of rules which define the effect of the set of components' teeth, the effect of the virtual treatment can be computed. This virtual treatment can be used to predict the results of a real-life orthodontic treatment as to design such a treatment.

First claim

What is claimed is:

1. A method for virtual orthodontic treatment using a computer system, comprising:
(a) providing a first virtual three-dimensional (3D) image indicative of a 3D model of all teeth of at least one jaw;
(b) selecting a virtual set of orthodontic components, comprising (i) brackets, one for each tooth in said first virtual three-dimensional (3D) image, for attachment to teeth of said first virtual three-dimensional (3D) image, each of said brackets having a slot for engaging a wire, and (ii) one or two archwires;
(c) associating the brackets with the teeth of said first virtual three-dimensional (3D) image so to obtain a second image of said virtual 3D model with the brackets associated with the teeth of the model, one bracket on each tooth in said model;
(d) using a set of rules, including a rule that requires each slot to engage the archwire, computing the manner of movement of each tooth with the bracket associated therewith, so as to obtain a third image comprising the teeth model following the virtual treatment;
(e) changing at least one bracket or the manner of associating a bracket with a tooth and repeating steps (c) and (d) one or more times until the teeth model of said third image represents a desired outcome of the orthodontic treatment; and
(f) outputting at least the third image from the computer system.

2. The method according to claim 1 , further comprising providing a user interface and wherein said selecting comprises using the user interface for selecting the virtual set of orthodontic components.

3. The method according to claim 1 , wherein said associating comprises manually associating the selected brackets with the teeth of said first virtual three-dimensional (3D) image.

4. The method according to claim 1 , wherein said associating comprises automatically associating the selected brackets with the teeth of said first virtual three-dimensional (3D) image.

5. The method according to claim 1 , wherein said first virtual three-dimensional (3D) image is a virtual representation of a three-dimensional (3D) model of the individual's teeth at interim treatment stage and said third image is a virtual representation of an interim or a final treatment stage.

6. The method according to claim 1 , wherein the virtual orthodontic components are represented by an image which is similar to the image of a real life component.

7. The method according to claim 1 , wherein the virtual orthodontic components are represented graphically in a manner not resembling the image of a real life component.

8. The method according to claim 1 , wherein said set of rules is extracted from a dynamic learning database holding an adjustable rule base.

9. The method according to claim 8 , wherein the adjustment of the database is based on characteristics of the individual undergoing the orthodontic treatment.

10. The method according to claim 1 , comprising virtually extracting one or more teeth from the teeth model of said first virtual three-dimensional (3D) image.

11. The method according to claim 10 , wherein said set of rules includes a rule that defines movement of teeth to occupy space previously occupied by an extracted tooth.

12. The method according to claim 10 , wherein the virtually extracting is performed manually by a user.

13. The method according to claim 10 , wherein the virtually extracting is performed automatically in case of teeth crowdedness.

14. The method according to claim 1 , comprising virtually adding a tooth to the model of said first virtual three-dimensional (3D) image.

15. The method according to claim 14 , wherein the added tooth represents one that has not yet grown.

16. The method according to claim 14 , wherein the added tooth represents a crown that may be added or implanted in a real-life treatment.

17. The method according to claim 1 , wherein at least one of said repetitions of steps (c) and (d), a position and/or orientation of at least one said orthodontic components with respect to the tooth it is associated with is changed with respect to a position and/or orientation, respectively, previously held.

18. The method according to claim 1 , wherein in at least one of said repetitions of steps (c) and (d), the type of orthodontic component associated with at least one tooth is changed with respect to the orthodontic component previously associated with said tooth.

19. The method according to claim 18 , wherein in at least one of said repetitions of steps (c) and (d), a position and/or orientation of at least one said orthodontic components with respect to the tooth it is associated with is changed with respect to a position and/or orientation, respectively, previously held.

20. A method for virtual orthodontic treatment using a computer system, comprising:
(a) providing a first virtual 3D model of teeth in a patient's jaw;
(b) selecting a virtual set of orthodontic components, comprising (i) brackets for attachment to teeth of the first virtual 3D model, and (ii) an archwire, each of the brackets having a slot for engaging the archwire;
(c) associating the brackets with the teeth of the first virtual 3D model so as to obtain a second virtual 3D model with the brackets positioned on the teeth of the first virtual 3D model;
(d) using a set of rules, including a rule that requires each slot to engage the archwire, computing the manner of movement of each tooth based at least partially on positioning of the bracket associated therewith, so as to obtain a resulting computed virtual 3D model of repositioned teeth following a virtual treatment;
(e) changing at least one bracket, the manner of associating a bracket with a tooth, the archwire shape, or a combination thereof, and repeating steps (c) and (d) one or more times until the resulting computed virtual 3D model of repositioned teeth following a virtual treatment represents a desired outcome of an orthodontic treatment; and
(f) outputting the resulting computed virtual 3D model of repositioned teeth following a virtual treatment from the computer system.

Assignees

• Align Technology Inc

Inventors

• Taub Eldad
• Kopelman Avi

Classifications

• G06N99/005

  Physics · mapped topic

• A61C7/002 Primary

  Orthodontic computer assisted systems · CPC title

• A61C7/00

  Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions · CPC title

• G06F19/3437

  Physics · mapped topic

• A61C7/12

  Brackets; Arch wires; Combinations thereof; Accessories therefor · CPC title