US 12,076,200 B2
Digital 3D models of dental arches with accurate arch width
Ofer Saphier, Rechovot (IL); and Avi Kopelman, Palo Alto, CA (US)
Assigned to Align Technology, Inc., San Jose, CA (US)
Filed by Align Technology, Inc., San Jose, CA (US)
Filed on Nov. 11, 2020, as Appl. No. 17/095,659.
Claims priority of provisional application 62/934,438, filed on Nov. 12, 2019.
Prior Publication US 2021/0137653 A1, May 13, 2021
Int. Cl. A61C 13/00 (2006.01); G06T 7/50 (2017.01); G06T 7/55 (2017.01); G06T 19/20 (2011.01)
CPC A61C 13/0004 (2013.01) [G06T 7/50 (2017.01); G06T 7/55 (2017.01); G06T 19/20 (2013.01); G06T 2219/028 (2013.01); G06T 2219/2004 (2013.01); G06T 2219/2008 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by a processing device, a plurality of intraoral scans of a dental arch;
determining, by the processing device, that at least one intraoral scan of the plurality of intraoral scans comprises both a buccal view of a first three-dimensional (3D) surface disposed at a first quadrant of the dental arch and having a first depth that is less than a depth threshold and a lingual view of at least a feature of a second 3D surface disposed at a second quadrant of the dental arch and having a second depth that is greater than the depth threshold, wherein there is a distance between the first 3D surface and at least the feature of the second 3D surface in the at least one intraoral scan;
stitching together the plurality of intraoral scans; and
generating a virtual 3D model of the dental arch from the plurality of intraoral scans, wherein the at least one intraoral scan is used for generation of both the first 3D surface of the virtual 3D model and the second 3D surface of the virtual 3D model, and wherein a distance between the first 3D surface and the second 3D surface in the virtual 3D model is based on the distance between first 3D surface and the feature of the second 3D surface in the at least one intraoral scan.