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  • Acta Orthop Traumato · Jan 2015

    Biomechanical outcome of proximal femoral nail antirotation is superior to proximal femoral locking compression plate for reverse oblique intertrochanteric fractures: a biomechanical study of intertrochanteric fractures.

    • Jian-Xiong Ma, Jie Wang, Wei-Guo Xu, Jing-Tao Yu, Yang Yang, and Xin-Long Ma.
    • Biomechanics Labs of Orthopaedic Institute, Tianjin Hospital, Tianjin, China.
    • Acta Orthop Traumato. 2015 Jan 1; 49 (4): 426-32.

    ObjectiveReverse obliquity intertrochanteric fractures are a challenge for orthopedic surgeons. The optimal internal fixation for repairing this type of unstable intertrochanteric fractures remains controversial. This study aimed to compare the biomechanical properties in axial load and cyclical axial load of proximal femoral nail antirotation (PFNA) and proximal femoral locking compression plate (PFLCP) for fixation of reverse obliquity intertrochanteric fractures.MethodsSixteen embalmed cadaver femurs were sawed to simulate reverse obliquity intertrochanteric fracture and instrumented with PFNA or PFLCP. Axial loads and axial cyclic loads were applied to the femoral head by an Instron tester. If the implant-femur constructs did not fail, axial failure load was added to the remaining implant-femur constructs.ResultsMean axial stiffness for PFNA was 21.10% greater than that of PFLCP. Cyclic axial loading caused significantly less (p=0.022) mean irreversible deformation in PFNA (3.43 mm) than in PFLCP (4.34 mm). Significantly less (p=0.002) mean total deformation was detected in PFNA (6.16 mm) than in PFLCP (8.67 mm).ConclusionFor fixing reverse obliquity intertrochanteric fractures, PFNA is superior to PFLCP under axial load.

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