Augmented reality enhancements for dental practitioners

Patent metadata

Field	Value
Publication number	US-12390307-B2
Application number	US-202217882371-A
Country	US
Kind code	B2
Filing date	Aug 5, 2022
Priority date	Dec 29, 2017
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

Apparatuses and methods for performing orthodontic treatment planning are provided. Virtual/Augmented Reality devices can be used to virtually manipulate patient's teeth, modify virtual models of the patient's teeth, analyze the fit of a dental appliance on the patient's teeth, analyze the position of attachment sites for dental appliances, and provide overlays showing forces applied to the patient's teeth. The VR/AR devices can be used by physicians and/or the patient to provide and display treatment planning. In some examples, a length and/or angle of an elastic band or wire and one or more effective forces on a patient's teeth when a dental appliance is applied to the patient's teeth may be determined. A visual overlay graphically illustrating the one or more effective forces may be generated and displayed.

First claim

What is claimed is:

1. A method of evaluating an orthodontic treatment, the method comprising:
capturing, with a processor of an augmented reality device, image data of a patient's teeth with an elastic band or wire on the patient's teeth;
determining, from the image data, with the processor, a length and/or angle of the elastic band or wire and one or more effective forces on the patient's teeth when a dental appliance is applied to the patient's teeth, wherein the one or more effective forces includes an effective force on a center of rotation of at least one of the patient's teeth resulting from the elastic band or wire;
generating a visual overlay graphically illustrating the one or more effective forces; and
outputting the visual overlay to a display of the augmented reality device, wherein the visual overlay is superimposed over a view of the patient's teeth and of the dental appliance placed on the patient's teeth.

2. The method of claim 1 , wherein generating the visual overlay comprises representing the one or more effective forces as an arrow.

3. The method of claim 1 , wherein generating the visual overlay comprises representing the one or more effective forces as an alphanumeric value.

4. The method of claim 1 , wherein generating the visual overlay comprises representing the one or more effective forces as a color.

5. The method of claim 1 , wherein determining the one or more effective forces on the patient's teeth comprises determining a moment or torque on one or more teeth.

6. The method of claim 1 , wherein capturing the image data of the patient's teeth comprises capturing the image data of the patient's teeth when the dental appliance is worn by the patient.

7. The method of claim 1 , wherein capturing the image data of the patient's teeth comprises capturing the image data of the patient's teeth when the dental appliance is not being worn by the patient; further comprising receiving a virtual model of the dental appliance.

8. A system comprising:
an augmented reality display;
one or more processors; and
a memory coupled to the one or more processors, the memory configured to store computer-program instructions, that, when executed by the one or more processors,
perform a computer-implemented method comprising:
capturing, with a processor of an augmented reality device, image data of a patient's teeth and of an elastic band or wire placed on the patient's teeth;
determining from the image data, with the processor, a length and/or angle of the elastic band or wire, and an effective force on a center of rotation of at least one of the patient's teeth resulting from the elastic band or wire;
generating, with the processor, a visual overlay identifying the effective force; and
outputting the visual overlay to a display of the augmented reality device, wherein the visual overlay is superimposed over a view of the patient's teeth and of the elastic band or wire placed on the patient's teeth.

9. The system of claim 8 , wherein generating the visual overlay comprises representing the effective force as an arrow.

10. The system of claim 8 , wherein generating the visual overlay comprises representing the effective force as an alphanumeric value.

11. The system of claim 8 , wherein generating the visual overlay comprises representing the effective force as a color.

12. The system of claim 8 , wherein determining the effective force comprises determining a moment or torque on one or more teeth.

13. The system of claim 8 , wherein capturing the image data of the patient's teeth comprises capturing the image data of the patient's teeth when a dental appliance is worn by the patient.

14. The system of claim 8 , wherein capturing the image data of the patient's teeth comprises capturing the image data of the patient's teeth when a dental appliance is not being worn by the patient; further comprising receiving a virtual model of the dental appliance.

15. The system of claim 8 , wherein outputting the visual overlay comprises displaying estimated forces acting on the patient's teeth where the estimated forces exceed a threshold value, wherein the threshold value is based on poor fit results in high forces acting on the patient's teeth and/or an improperly placed band or attachment.

16. A method of evaluating an orthodontic treatment, the method comprising:
capturing, with a processor of an augmented reality device, image data of a patient's teeth and of an elastic band or wire placed on the patient's teeth;
determining from the image data, with the processor, a length and/or angle of the elastic band or wire, and an effective force on a center of rotation of at least one of the patient's teeth resulting from the elastic band or wire;
generating, with the processor, a visual overlay identifying the effective force; and
outputting the visual overlay to a display of the augmented reality device, wherein the visual overlay is superimposed over a view of the patient's teeth and of the elastic band or wire placed on the patient's teeth.

17. The method of claim 16 , wherein generating the visual overlay comprises representing the effective force as a vector.

18. The method of claim 16 , wherein generating the visual overlay comprises representing the effective force as a color.

19. The method of claim 16 , wherein capturing the image data of the patient's teeth comprises capturing the image data of the patient's teeth when a dental appliance is worn by the patient.

20. The method of claim 16 , wherein capturing the image data of the patient's teeth comprises capturing the image data of the patient's teeth when a dental appliance is not being worn by the patient; further comprising receiving a virtual model of the dental appliance.

Assignees

• Align Technology Inc

Inventors

• Shanjani Yaser
• Cam Bruce

Classifications

• G06T2207/30036

  Dental; Teeth · CPC title

• G06T7/60

  Analysis of geometric attributes · CPC title

• G06T7/0012

  Biomedical image inspection · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B2027/0141

  characterised by the informative content of the display · CPC title