US 12,076,206 B2
Methods for aligner design using thickness maps
Yuxiang Wang, Newark, CA (US); Andrew Jang, San Mateo, CA (US); Bruce Cam, San Jose, CA (US); Rohit Tanugula, San Jose, CA (US); Chunhua Li, Cupertino, CA (US); Jun Sato, San Jose, CA (US); Luyao Cai, Santa Clara, CA (US); Pavel Pokotilov, Santa Clara, CA (US); Kangning Su, Arlington, VA (US); and John Y. Morton, San Jose, CA (US)
Assigned to Align Technology, Inc., San Jose, CA (US)
Filed by Align Technology, Inc., San Jose, CA (US)
Filed on Apr. 25, 2023, as Appl. No. 18/306,530.
Application 18/306,530 is a continuation of application No. 16/732,141, filed on Dec. 31, 2019, granted, now 11,666,415.
Claims priority of provisional application 62/788,043, filed on Jan. 3, 2019.
Prior Publication US 2023/0255728 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 30/20 (2020.01); A61C 7/00 (2006.01); A61C 7/08 (2006.01)
CPC A61C 7/002 (2013.01) [A61C 7/08 (2013.01); G06F 30/20 (2020.01)] 20 Claims
OG exemplary drawing
 
11. A method comprising:
receiving a treatment plan for a patient's dentition, wherein the treatment plan comprises a plurality of treatment stages for repositioning the patient's dentition from an initial position toward a final position;
generating an aligner model representing an aligner configured to implement a treatment stage of the treatment plan, wherein the aligner model comprises a thickness map having a thickness parameter for each location of the aligner model, and wherein each thickness parameter is initially set to a starting thickness greater than an expected final thickness of the corresponding location;
adjusting the thickness map by:
using the aligner model to evaluate an outcome when the aligner is applied to the patient's dentition, and
iteratively reducing the value of at least some of the thickness parameters of the thickness map based on the evaluation until a resulting thickness is determined for each thickness parameter, and
providing instructions to manufacture the aligner based on the aligner model with the resulting thickness for each thickness parameter of the thickness map.