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公开(公告)号:US11723749B2
公开(公告)日:2023-08-15
申请号:US17353535
申请日:2021-06-21
Applicant: Align Technology, Inc.
Inventor: Artem Borovinskih , Mitra Derakhshan , Carina Morik , Eric Meyer , Ekaterina Tolstaya , Yury Brailov
IPC: A61C7/00 , G06T7/00 , G06T7/32 , G06T7/136 , G06T3/00 , G06T7/269 , G06T17/00 , G06V30/182 , G06T5/20
CPC classification number: A61C7/002 , G06T3/0031 , G06T5/20 , G06T7/0014 , G06T7/136 , G06T7/269 , G06T7/32 , G06T17/00 , G06V30/1831 , A61C2007/004 , G06T2207/30036
Abstract: The current document is directed to methods and systems for monitoring a dental patient's progress during a course of treatment. A three-dimensional model of the expected positions of the patient's teeth can be projected, in time, from a three-dimensional model of the patient's teeth prepared prior to beginning the treatment. A digital camera is used to take one or more two-dimensional photographs of the patient's teeth, which are input to a monitoring system. The monitoring system determines virtual-camera parameters for each two-dimensional input image with respect to the time-projected three-dimensional model, uses the determined virtual-camera parameters to generate two-dimensional images from the three-dimensional model, and then compares each input photograph to the corresponding generated two-dimensional image in order to determine how closely the three-dimensional arrangement of the patient's teeth corresponds to the time-projected three-dimensional arrangement.