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12 March 2020 : Laboratory Research  

Biomechanics of Anterior Ring Internal Fixation Combined with Sacroiliac Screw Fixation for Tile C3 Pelvic Fractures

Lin Liu12ABCDEFG, Shicai Fan1ABC, Yuhui Chen1CD, Yongxing Peng1BG, Xiangyuan Wen1CFG, Donggui Zeng2BCEG, Hui Song2BCD, Dadi Jin1DEF*

DOI: 10.12659/MSM.915886

Med Sci Monit 2020; 26:e915886

Abstract

BACKGROUND: Despite the development of minimally invasive techniques for pelvic fractures, performing minimally invasive surgery for Tile C3 pelvic fractures remains challenging. Thus, we propose use of anterior ring internal fixation combined with sacroiliac screw fixation for Tile C3 pelvic fractures.

MATERIAL AND METHODS: A normal pelvic finite element model (model 1) was established. Two-screw, three-screw, and four-screw anterior ring internal fixators and plate combined with sacroiliac screw Tile C3 pelvic fracture models (models 2, 3, 4, and 5, respectively) were also established. A vertical load of 600 N was applied on S1. The distribution of displacement and stress in the standing and sitting positions was compared.

RESULTS: Models 2, 3, 4, and 5 can provide effective fixation. Compared with model 1, in the erect position, the maximum displacement of models 2, 3, 4, and 5 increased by 66.51%, 65.36%, 35.16%, and 35.47% and the maximum stress increased by 201.78%, 130.65%, 100.82%, and 99.03%, respectively. Compared with model 1, in sitting position, the maximum displacement of models 2, 3, 4, and 5 increased by 9.1%, 11.04%, 5.57%, and 8.59% and the maximum stress increased by 157.73%, 118.02%, 98.32%, and 93.16%, respectively.

CONCLUSIONS: Anterior ring internal fixators combined with sacroiliac screws can effectively fix Tile C3 pelvic fractures.

Keywords: Internal Fixation System, finite element method, Biomechanics, Pelvic Fracture, Biomechanical Phenomena, Bone Plates, Bone Screws, Finite Element Analysis, Fracture Fixation, Internal, Fractures, Bone, Models, Biological, Pelvic Bones, Sacroiliac Joint

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750