US 12,167,949 B2
Method for evaluating an orthodontic aligner
Philippe Salah, Paris (FR); Thomas Pellissard, Maisons-Alfort (FR); Guillaume Ghyselinck, Cantin (FR); and Laurent Debraux, Paris (FR)
Assigned to DENTAL MONITORING, Paris (FR)
Appl. No. 17/604,936
Filed by DENTAL MONITORING, Paris (FR)
PCT Filed Apr. 24, 2020, PCT No. PCT/EP2020/061499
§ 371(c)(1), (2) Date Oct. 19, 2021,
PCT Pub. No. WO2020/216925, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 1904306 (FR), filed on Apr. 24, 2019.
Prior Publication US 2022/0202532 A1, Jun. 30, 2022
Int. Cl. A61C 7/08 (2006.01); A61C 7/00 (2006.01)
CPC A61C 7/08 (2013.01) [A61C 7/002 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of evaluation, by computer, at an “updated time”, of the conformity of an orthodontic aligner to a dental arch of a patient on which said aligner bears, referred to as the “support arch”, said aligner having an interior surface and an exterior surface, said method including the following successive steps:
A) producing a digital three-dimensional model of the support arch, in its configuration at the updated time, or an “updated reference model”, and determining, in the updated reference model, a support surface of the aligner, the support surface being a surface of the updated reference model that partially or completely models the surface of the support arch on which the aligner bears in the surface position;
B) deforming the support surface, as a function of the thickness of material between the interior surface of the aligner and the exterior surface of the aligner to obtain a deformed support surface;
C) comparing an exterior surface of the aligner with said deformed support surface in such a manner as to evaluate the difference between the exterior surface of the aligner and said deformed support surface, followed by determining, as a function of said difference, at least one score of conformity of the aligner to the support arch, the aligner including an interior surface opposite the exterior surface.