US 11,880,973 B2
Image-based defect detection of dental appliances
Andrey Cherkas, Krasnoznamensk (RU); Danila Chesnokov, Barnaul (RU); and Anatoliy Parpara, Moscow (RU)
Assigned to Align Technology, Inc., San Jose, CA (US)
Filed by Align Technology, Inc., San Jose, CA (US)
Filed on Feb. 16, 2022, as Appl. No. 17/673,711.
Application 17/673,711 is a continuation of application No. 16/837,954, filed on Apr. 1, 2020, granted, now 11,295,444.
Claims priority of provisional application 62/827,671, filed on Apr. 1, 2019.
Prior Publication US 2022/0172364 A1, Jun. 2, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 7/11 (2017.01); G06T 7/00 (2017.01); A61C 7/08 (2006.01); A61C 7/00 (2006.01); G06T 7/38 (2017.01); G06T 7/32 (2017.01); G06T 17/20 (2006.01); G06T 5/00 (2006.01); G06T 7/136 (2017.01); B33Y 80/00 (2015.01)
CPC G06T 7/0012 (2013.01) [A61C 7/002 (2013.01); A61C 7/08 (2013.01); G06T 5/002 (2013.01); G06T 7/11 (2017.01); G06T 7/136 (2017.01); G06T 7/32 (2017.01); G06T 7/38 (2017.01); G06T 17/205 (2013.01); B33Y 80/00 (2014.12); G06T 2207/20081 (2013.01); G06T 2207/20084 (2013.01); G06T 2207/20182 (2013.01); G06T 2207/30036 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A non-transitory computer readable medium comprising instructions that, when executed by a processing device, cause the processing device to perform a method for detecting one or more defects in a customized dental appliance, the customized dental appliance customized for a specific arch of a specific patient, the method comprising:
obtaining one or more images of the customized dental appliance;
obtaining a digital model associated with the customized dental appliance;
registering the one or more images to the digital model;
comparing an area of the one or more images of the customized dental appliance with the digital model of the customized dental appliance;
determining a difference between a representation of the customized dental appliance in the area of the one or more images and the digital model of the customized dental appliance at a region;
determining whether the difference satisfies a defect criterion; and
responsive to determining that the difference satisfies the defect criterion, determining that the customized dental appliance has a manufacturing defect at the region associated with the difference.