Transient dynamic analysis and optimization of a new customized lingual self-locking appliance during occluding
- VernacularTitle:个性化舌侧自锁矫治器咬合过程瞬态动力学分析及优化
- Author:
Qin-xiang XIA
1
;
Chen-yang CHANG
1
;
Bin CAI
2
;
Jing-mei ZHAI
1
Author Information
1. School of Mechanical and Automotive Engineering, South China University of Technology
2. Guangdong Provincial Key Laboratory of Oral Medicine, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University
- Publication Type:Journal Article
- Keywords:
Lingual orthodontics;
Appliance design;
Occlusal force;
Dynamic simulation;
Finite element analysis
- From:
Journal of Medical Biomechanics
2013;28(6):E659-E664
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the characteristics of stress distributions on a customized lingual self-locking orthodontic appliance under transient occlusal force and optimize its structure. Methods A whole 3D model including denture, appliances and wire was established by CT scanning, reverse engineering method and CAD technology; transient nonlinear dynamic analysis on this model during occluding and its structural optimization were conducted, and the optimized lingual appliance was made based on rapid prototyping technology to verify reliability of the finite element model. Results The equivalent stress on the bracket bottom was larger than that on other parts of the bracket; the maximum equivalent stress on the bracket cover was decreased by 60.9% after installing a reinforcing rib on it, which could effectively prevent stress concentration caused by the contact between the arch wire and bracket cover. The simulation results fundamentally agreed with the loading experiment on the bracket cover. Conclusions For lingual orthodontic treatment in clinic, the relative position between interaction points of the occlusal force and brackets should be concerned so as to avoid impairing the self-locking function; through optimizing the appliance design, the elastic potential energy of arch wire can be transferred more effectively to the teeth and reduce losses of the orthodontic force.
