Thread shape affects the stress distribution of torque force on miniscrews: a finite element analysis

Yu-shan Ye, Wei-min Yi, Pei-lin Zhuang, Mo Liu, Yan-song Yu, Ying-juan Lu, Qing-he Yao, Wei Wang and Shao-hai Chang

Computer Methods in Biomechanics and Biomedical Engineering, 2020, vol. 23, issue 13, 1034-1040

Abstract: This study aimed to investigate the effect of miniscrews thread shape on the stress distribution receiving a torque load. Seven thread shapes (S,V1,V2,B1,B2,R1,R2) models were constructed and a 6 Nmm-torque load was applied. The order of maximum equivalent stress (EQV) value was V1 > V2 > B1 > R1 > R2 > B2 > S. The order of maximum displacement of miniscrew (Max DM) value was S > B2 > R1 = V1 > B1 > V2 > R2. Model R2 may be the most appropriate thread shape affording a torque force.

Date: 2020
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DOI: 10.1080/10255842.2020.1784884

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