Construction and assessment of a three-dimensional finite element model of mandibualr second molar mesialization using customized lingual appliance and mini-implant
10.3760/cma.j.issn.1002-0098.2017.12.005
- VernacularTitle: 舌侧矫治近中移动下颌第二磨牙的三维有限元分析
- Author:
Chang CHEN
1
;
Chenxi WANG
1
;
Jianhao YANG
1
;
Liuyi CAI
2
;
Qiguo RONG
3
;
Yuelan ZHANG
1
Author Information
1. Department of Orthodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
2. Department of Stomatology, Armed Police Corps Hospital of Henan, Zhengzhou 450052, China
3. Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100061, China
- Publication Type:Journal Article
- Keywords:
Orthodontic extrusion;
Orthodontic anchorage procedures;
Finite element analysis;
Lingual orthodontics
- From:
Chinese Journal of Stomatology
2017;52(12):735-739
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To construct a three-dimensional (3D) finite element model and analyze the biomechanical characteristics during mandibular second molar mesialization using customized lingual appliances and mini-implant.
Methods:One adult student volunteer from The First Affiliated Hospital of Zhengzhou University with lower left first molar extraction was selected. After CT scanning, Mimics, Geomagic, ANSYS were employed to develop a 3D finite element model including customized lingual brackets, stainless steel lingual arch wire, buccal buckles, lower dentition, periodontal ligaments and alveolar bone. Four different loading methods (1. the force of 1.470 N loaded at the lingual side only; 2, 3, 4. the forces of 0.490, 0.735 and 0.980 N loaded at both buccal and lingual sides, respectively.) were included. The initial displacements of the lower second molar and stress distribution in the periodontal ligaments were analyzed.
Results:More uniform stress distributions in the periodontal membrane of mandibular left second molar were found when the mesial force were loaded at both buccal and lingual sides than the force loaded at lingual side only. More inclination of the second molar was observed when force loaded at both sides than at lingual side only. With the values of the force increased, the mesial inclination potential of the second molar, the initial movement of the second molar and the stress distribution in the periodontal membrane increased. Under the force of 0.735 N at both buccal and lingual sides, mesially inclined initial displacements of the mandibuar second molar were observed and the stress values of von Mises was in the suitable area.
Conclusions:Less second molar rotation was found when the force loaded at both buccal and lingual sides than loaded at lingual side only. However, force loaded at both sides would increase the measial inclination potential of the second molar.
