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《Journal of Clinical Stomatology》 2018-09
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A 3D-FEM study of effect of individualized lingual bracket with different slot lengths to the central incisor rotation performance

HUANG Xiao-jing;LI Qiu-hua;WU Ao;ZENG Yu-wen;XIONG Guo-ping;Department of Orthodontics,The second Clinical Medical College of Jinan University,Stomatology Center of Shenzhen People’s Hospital;  
Objective: To compare the performances correcting the rotational upper right central incisor when use the individualized lingual brackets with different slot lengths by constructing a lingual 3 D finite element method( FEM) with rotational upper right central incisor. Methods: After scanning the standard dentition and its periodontal tissues,a 3-D FEM,including the 10 degree medially and lingual rotational upper right central incisor and its adjacent teeth,periodontal ligament( PDL),alveolar bone,e-Brace brackets,and lingual wire,was constructed,and then to analysis the rotation performances with them,using finite element method. Results: Four 3-D FEM models were constructed,including dentition,PDL,alveolar bone,e-Brace brackets,and lingual wire. With the lingual bracket slot lengths increasing,the total deformation and periodontal ligament stress of upper right central incisor increase. Conclusion: Within safe levels of periodontal ligament stress,the lingual bracket with 3/4 crown wide( 6. 3 mm) slots length got the greatest therapeutic effect for correcting the rotational upper right central incisor.
【Fund】: 深圳市科技创新项目“深圳市科技创新委员会资助”(JCYJ20150403101028190)
【CateGory Index】: R783.5
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