Author:
Ma Yupeng,Zhao Yong,Zou Dexin,Dong Shengjie,Sun Xiujiang,Cheng Gong,Lian Wei,Zhao Yuchi,Sun Tao,Wang Dan,Zhang Shudong
Abstract
Abstract
Objective
To compare the breakage risk of lengthened sacroiliac screws and ordinary sacroiliac screws to treat unilateral vertical sacral fractures and provide a reference for clinical application.
Methods
A finite element model of Tile C pelvic ring injury (unilateral type Denis II fracture of the sacrum) was produced. The sacral fractures were fixed with a lengthened sacroiliac screw and ordinary sacroiliac screw in 6 types of models. The maximal von Mises stresses and stress distributions of the two kinds of screws when standing on both feet were measured and compared.
Results
The maximal von Mises stress of the lengthened screw was less than that of the ordinary screw. Compared with ordinary screw, the stress distribution in the lengthened screw was more homogeneous.
Conclusions
The breakage risk of screws fixed in double segments is lower than that of screws fixed in single segments, the breakage risk of lengthened screws is lower than that of ordinary screws, and the breakage risk of screws fixed in S2 segments is lower than that of screws fixed in S1 segments.
Funder
National Natural Science Foundation of China
Key R&D Program of Shandong Province
Project of Medical and Health Technology Development Program of Shandong Province, China
Young and Middle-Aged Scientists Research Awards Foundation of Shandong Province, China
Science & Technology Innovation Development Project of Yantai City, China,
Medical University "Clinical + X" Scientific and Technological Innovation Project
Publisher
Springer Science and Business Media LLC
Subject
Orthopedics and Sports Medicine,Rheumatology
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