Biomechanical Evaluation of the Modified Cannulated Screws Fixation of Unstable Femoral Neck Fracture with Comminuted Posteromedial Cortex

作者: Jingwen Liu , Baokun Zhang , Bohao Yin , Hongchi Chen , Hui Sun

DOI: 10.1155/2019/2584151

关键词:

摘要: Purpose. To verify the biomechanical importance with respect to integrity of posteromedial cortex femoral neck fracture (FNF) and demonstrate whether modified fixation cannulated screws (CSs) could increase strength. Methods. A total 24 left artificial femurs were randomly divided into three groups. The osteotomy was made in center at a 20° angle shaft axial. cortices removed groups B C. In group A, 8 intact fixed parallel partial thread (PTSs), forming standard triangle. B, stabilized same CSs like A. C, two inferior PTSs replaced by fully (FTSs). Results. lower A-P axial stiffness load failure along higher displacement found compared (p≤0.001 for all). Between increased reduced Conclusions. We verified that comminuted affected strength adversely resulted displacement. characterized FTSs improve performance buttress head fragment better.

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