Molar Distalization with Two Invisible Orthodontic Sequences:A Finite Element Comparison
10.16156/j.1004-7220.2024.02.020
- VernacularTitle:两种隐形正畸序列磨牙远移的有限元比较
- Author:
Hui LI
1
;
Dongliang ZHANG
Author Information
1. 北京市医用内植物工程技术研究中心,北京 100194
- Keywords:
clear Aligner orthodontics;
tooth movement sequence;
mandibular molar distalization finite element analysis
- From:
Journal of Medical Biomechanics
2024;39(2):326-331
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the effects of clear-aligner orthodontics with two orthodontic sequences on molar distalization.Methods A finite-element model of seven right mandibular teeth with periodontal alveolar bone and braces was established.Two molar distalization sequences were selected to simulate the distal movement of the second molar(0.5 mm),and the long-term tooth movement was simulated using the alveolar bone reconstruction technique.Results The maximum distal displacement of the second molar with V-pattern and ZC sequences was 0.27 mm and 0.34 mm,respectively,and the ZC distal displacement efficiency was increased by 13.34％.The tooth inclination was corrected by 0.18 mm and 0.44 mm,the lingual inclination was corrected by 1.15° and 2.69°,respectively,and the correction rate of ZC lingual inclination was increased by 15.01％.The distal tilt of the ZC increased by 1.83° and 0.84°,and the distal tilt of the ZC decreased by 54.10％.Conclusions The ZC sequence method can realize distal molar movement more effectively,reduce the distal inclination of the molar,and correct the lingual inclination of the molar,providing favorable conditions for orthodontic treatment of anterior teeth.
