US 12,076,204 B2
Method for generating a model of a dental arch
Philippe Salah, Paris (FR); Laurent Debraux, Paris (FR); and Thomas Pellissard, Paris (FR)
Assigned to DENTAL MONITORING, Paris (FR)
Appl. No. 17/612,815
Filed by DENTAL MONITORING, Paris (FR)
PCT Filed May 20, 2020, PCT No. PCT/EP2020/064182
§ 371(c)(1), (2) Date Nov. 19, 2021,
PCT Pub. No. WO2020/234411, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 1905357 (FR), filed on May 22, 2019.
Prior Publication US 2022/0222910 A1, Jul. 14, 2022
Int. Cl. A61C 7/00 (2006.01); A61C 9/00 (2006.01); A61C 13/34 (2006.01); G06T 19/20 (2011.01); G06V 10/10 (2022.01); G06V 10/44 (2022.01); G06V 10/82 (2022.01); G06V 20/64 (2022.01)
CPC A61C 7/002 (2013.01) [A61C 9/0053 (2013.01); A61C 13/34 (2013.01); G06T 19/20 (2013.01); G06V 10/17 (2022.01); G06V 10/44 (2022.01); G06V 10/454 (2022.01); G06V 10/82 (2022.01); G06V 20/64 (2022.01); G06T 2210/41 (2013.01); G06T 2219/2004 (2013.01); G06T 2219/2021 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A non-transitory computer medium storing computer-program instructions for executing a method, performed by computer, for generating an updated three-dimensional digital model of a dental arch of a patient, during a treatment with orthodontic aligners of said dental arch, the treatment implementing a treatment plan generated before the start of the treatment, a treatment plan comprising a sequence of models, representing successive expected intermediate and final configurations of the dental arch at intermediate times during the treatment and at the end at the treatment, the generating method comprising the following steps:
1) before step 3), determining an active intermediate model from intermediate models of the treatment plan;
2) searching, in at least one of updated images for one or more representations of teeth that is not inconformity with the treatment plan, wherein the non-conformity being measured by comparing said at least one of the update images with a view of the active intermediate model, and the at least one of the update images being acquired during the treatment, each of the update images being an aligner image representing an active aligner attached to the dental arch, or an image of bare teeth representing the dental arch without aligner;
3) for each not conforming tooth detected, identifying in the active intermediate model a not conforming tooth model representing the not conforming tooth detected during the searching;
4) deforming the active intermediate model by moving each of not conforming tooth models until an updated model compatible with the at least one of the update images is obtained, wherein the deformation depending on the measurement of the non-conformity performed at step 2).