US 12,295,801 B2
Method and system for evaluating implanting precision of an implant
Lifeng Wang, Beijing (CN); and Chen Shen, Beijing (CN)
Assigned to BEIJING YAKEBOT TECHNOLOGY CO., LTD, Beijing (CN)
Appl. No. 17/267,262
Filed by BEIJING YAKEBOT TECHNOLOGY CO., LTD, Beijing (CN)
PCT Filed May 6, 2019, PCT No. PCT/CN2019/085680
§ 371(c)(1), (2) Date Feb. 9, 2021,
PCT Pub. No. WO2020/034668, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 201810931225.7 (CN), filed on Aug. 15, 2018.
Prior Publication US 2021/0307882 A1, Oct. 7, 2021
Int. Cl. A61C 13/00 (2006.01); A61B 34/10 (2016.01); A61C 8/00 (2006.01)
CPC A61C 13/0004 (2013.01) [A61B 34/10 (2016.02); A61C 8/00 (2013.01); A61B 2034/105 (2016.02); A61B 2034/108 (2016.02)] 15 Claims
OG exemplary drawing
 
1. A method for evaluating implanting precision, applied to a system for evaluating implanting precision, comprising:
using a computed tomography scanning device to scan an oral cavity, before implantation, to acquire a two-dimensional scan of the oral cavity;
constructing a first three-dimensional model of the oral cavity, based on the two-dimensional scan;
wherein the first three-dimensional model is an entity model that represents information about teeth in the oral cavity without a target implant;
using an oral digital scanning device to scan the oral cavity, before implantation, to produce a first surface model of the oral cavity;
wherein the first surface model is a surface model that represents information about the teeth in the oral cavity without the target implant;
identifying a predicted position of the target implant in the first three-dimensional model, comprising:
determining an initial predicted position of the target implant in the first three-dimensional model; and
obtaining shape parameters of teeth adjacent to the target implant based on the first surface model to correct the initial predicted position, so as to obtain the predicted position of the target implant in the first three-dimensional model;
using the oral digital scanning device to scan the oral cavity, after implantation is completed, to produce a second surface model of the oral cavity comprising the target implant;
wherein the second surface model is a surface model that represents information about the teeth in the oral cavity with the target implant located therein,
determining an actual position of the target implant in the first three-dimensional model, based on the second surface model, the first three-dimensional model and the first surface model; and
comparing the actual position of the target implant in the first three-dimensional model and the predicted position of the target implant in the first three-dimensional model to determine an evaluation result of the implanting precision of the target implant.