Dental panoramic views

Patent metadata

Field	Value
Publication number	US-11707238-B2
Application number	US-202017017613-A
Country	US
Kind code	B2
Filing date	Sep 10, 2020
Priority date	Sep 10, 2019
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

Provided herein are devices and methods generating a panoramic rendering of a subject's teeth. Methods and processes are provided to image the subject's teeth with a dental scan. Methods and processes are also provided to automatically 3D render the subject's teeth with the scan images. Methods and apparatuses are also provided to generate simulated panoramic views of the subject's dentition from various perspectives.

First claim

What is claimed is:

1. A method of displaying a panoramic view of a dental arch, the method comprising:
receiving a plurality of two-dimensional (2D) images of the dental arch each taken at an associated camera angle and position;
identifying a viewing angle for viewing the panoramic view of the dental arch;
identifying a center jaw line for the plurality of 2D images and identifying a plurality of points along the center jaw line;
generating the panoramic view at the viewing angle by:
selecting, for each point of the plurality of points, an image that is based on one or more 2D images from the plurality of 2D images that includes the point and has a camera angle that corresponds to the viewing angle; and
combining the selected images; and

displaying the panoramic view.

2. The method of claim 1 , wherein the plurality of 2D images comprise infrared images.

3. The method of claim 1 , wherein selecting the image that is based on one or more of the 2D images from the plurality of 2D images comprises generating a novel, synthesized 2D image from three or more of the plurality of 2D images for one or more points of the plurality of points.

4. The method of claim 3 , further wherein generating the novel, synthesized 2D image comprises identifying three contributing images from the plurality of 2D images having a minimal difference between the camera angles for each of the contributing images as compared to the viewing angle and wherein a position of a viewpoint of the novel, synthesized 2D image is enclosed by a triangle formed by a camera position for each of the three contributing images.

5. The method of claim 1 , wherein identifying the center jaw line for the plurality of 2D images comprises arranging the plurality of 2D images along the center jaw line based on one or more of: a content of the 2D images and position information collected for each 2D image when the 2D image was taken.

6. The method of claim 1 , wherein combining comprises combining along a line corresponding to the center jaw line.

7. The method of claim 1 , wherein combining comprises blending the selected images to match gradients at boundaries of adjacent selected images.

8. The method of claim 1 , wherein generating the panoramic view includes displaying the teeth of the dental arch in a line in accordance with a linear center jaw line.

9. The method of claim 1 , further comprising changing the viewing angle to a second viewing angle based on a user input and generating a second panoramic view using the second viewing angle.

10. The method of claim 1 , wherein the viewing angle is chosen by a user via a user interface that allows the user to move the panoramic view.

11. The method of claim 1 , wherein the viewing angle is perpendicular to a virtual screen passing through the center jaw line.

12. The method of claim 1 , further comprising rendering regions of the panoramic view having different densities or compositions with different shades or colors.

13. The method of claim 1 , further comprising:
creating a treatment plan based on the panoramic view; and
implementing the treatment plan on the patient.

14. The method of claim 1 , further comprising forming one or more dental appliances in accordance with a treatment plan based on the panoramic view.

15. The method of claim 1 , further comprising scanning a patient's dental arch to collect the plurality of two-dimensional (2D) images of the dental arch.

16. The method of claim 1 , wherein selecting, for each point of the plurality of points, the image that is based on one or more 2D images from the plurality of 2D images comprises selecting the image from the one or more 2D images from the plurality of 2D images that has a camera angle that most closely approximates the viewing angle.

17. The method of claim 1 , wherein selecting, for each point of the plurality of points, the image that is based on one or more 2D images from the plurality of 2D images comprises extrapolating an image from the one or more 2D images.

18. A system comprising:
one or more processors; and
a memory coupled to the one or more processors, the memory comprising a non-transitory computing device readable medium having instructions stored thereon that are executable by the one or more processors to perform a method comprising:
receiving a plurality of two-dimensional (2D) images of the dental arch each taken at an associated camera angle;
identifying a viewing angle for viewing the panoramic view of the dental arch;
identifying a center jaw line for the plurality of 2D images and identifying a plurality of points along the center jaw line;
generating the panoramic view at the viewing angle by:
selecting, for each point of the plurality of points, an image that is based on one or more 2D images from the plurality of 2D images that includes the point and has a camera angle that corresponds to the viewing angle; and
combining the selected images; and

displaying the panoramic view.

19. The system of claim 18 , wherein the instructions further comprise identifying the viewing angle by receiving the viewing angle from a user interface.

20. The system of claim 19 , wherein the user interface is configured to allow a user to dynamically change the viewing angle and to display the corresponding panoramic view.

21. The system of claim 18 , wherein selecting the image that is based on one or more of the 2D images from the plurality of 2D images comprises generating a novel, synthesized 2D image from three or more of the plurality of 2D images for one or more points of the plurality of points.

22. The system of claim 21 , further wherein generating the novel, synthesized 2D image comprises identifying three contributing images from the plurality of 2D images having a minimal difference between the camera angles for each of the contributing images as compared to the viewing angle and wherein a position of a viewpoint of the novel, synthesized 2D image is enclosed by a triangle formed by a camera position for each of the three contributing images.

Assignees

• Align Technology Inc

Inventors

• Moshe Maayan
• Ayal Shai
• Coslovsky Jonathan
• Levin Adi
• Zulti Avraham
• Farkash Shai

Classifications

• A61B6/14 Primary

  Human Necessities · mapped topic

• A61B6/463

  characterised by displaying multiple images or images and diagnostic data on one display · CPC title

• A61B6/465

  adapted to display user selection data, e.g. graphical user interface, icons or menus · CPC title

• A61B6/5211

  involving processing of medical diagnostic data · CPC title

• A61C9/004 Primary

  Means or methods for taking digitized impressions · CPC title