US 12,444,102 B2
Method for generating edge curve for dental devices
Marat Khaitov, Copenhagen K (DK); and Karl-Josef Hollenbeck, Copenhagen Ø (DK)
Assigned to 3SHAPE A/S, Kobenhavn K (DK)
Appl. No. 17/782,253
Filed by 3SHAPE A/S, Copenhagen K (DK)
PCT Filed Dec. 4, 2020, PCT No. PCT/EP2020/084681
§ 371(c)(1), (2) Date Jun. 3, 2022,
PCT Pub. No. WO2021/110938, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. PA 2019 70753 (DK), filed on Dec. 6, 2019.
Prior Publication US 2023/0005196 A1, Jan. 5, 2023
Int. Cl. G06T 7/13 (2017.01); A61C 7/00 (2006.01); A61C 7/08 (2006.01); A61C 13/34 (2006.01); G06F 30/17 (2020.01); G06T 11/20 (2006.01); G06T 17/20 (2006.01)
CPC G06T 11/203 (2013.01) [A61C 7/002 (2013.01); A61C 7/08 (2013.01); A61C 13/34 (2013.01); G06F 30/17 (2020.01); G06T 7/13 (2017.01); G06T 17/20 (2013.01); G06T 2210/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A computer-implemented method for generating an edge curve to facilitate cutting at least a portion of a dental device, said method comprising:
identifying at least one tooth reference point for each of at least two teeth on a dental model;
identifying at least one offset point corresponding to each of said at least one tooth reference points such that said at least one offset point is on a gingival surface of said dental model and positioned outside an interproximal area; and
generating said edge curve by connecting the offset points such that the edge curve is outside the interproximal area and on the gingival surface;
wherein the at least two teeth comprises a first tooth and a second tooth, further comprising:
identifying at least one control point in a region defined by at least three of: a first visible apex corresponding to a first tooth, a second visible apex corresponding to a second tooth, a first offset point corresponding to the first visible apex, and/or a second offset point corresponding to the second visible apex, the at least one control point lying on the gingival surface outside the interproximal area; and
generating the edge curve by connecting the first offset point, the at least one control point, and the second offset point.