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《Journal of Clinical and Pathological Research》 2015-07
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Biomechanical analysis of postoperative plate fracture of femoral shaft fracture

LI Ping;TAN Xiongjin;LUO Zhaoyang;Medical Engineering Section,The People's Liberation Army Six Nine Hospital;Department of Orthopedics, The People's Liberation Army Six Nine Hospital;Department of Pathology, University of South China;  
Objective: To analyze the biomechanical causes of postoperative femoral shaft fractures plate fracture, and investigate the method to decrease the rate of postoperative plate fracture. Methods: A total of 10 femoral specimens, which selected from 5 male adult cadavers with intact anti-corrosion bilateral femur, are evenly divided into medial group and outside group according to pairing left and right. Specimen fracture model was built and fixed by using the inner rear side and anterolateral plate respectively. Compression, anteflexion and retroflexion experiments were conducted to observe the displacement and explore the biomechanical causes of broken plate. Results: In the compression experiment of 100~400 N load, there was no significant difference between lateral group and medial group of displacement(P0.05). The displacement of lateral group was significantly higher than that of medial group under 500 N load(P0.05). In anteflexion and retroflexion experiments of 20~80 N load, there were no significant difference between lateral group and medial group of displacement(P0.05). The displacement of lateral group was significantly higher than that of medial group under 100 N load(P0.05). Conclusion: Indwelling locking plate in the inner rear side has better biomechanical stability and positive effect on reducing postoperative plate fracture.
【CateGory Index】: R687.3;R318.01
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