| abstract |
The invention provides 3D imaging methods and apparatus (including 3D optical coherence tomography imaging) for measuring the shape of orthodontic aligners, teeth and other oral structures simultaneously, in vivo or in vivo. in vitro. The methods and apparatus can be used to determine contact locations of aligners with teeth and / or teeth with other teeth with very high accuracy, including determining the size of spaces where they are not. not in contact. Measurements can be used to design, modify or replace an aligner and / or to check aligner fit. 3D models of the entire aligner and teeth can be generated. |