Different implant fixation repairs femoral neck combined with ipsilateral subtrochanteric fractures: comparisons of biomechanical properties

doi:10.3969/j.issn.2095-4344.2016.13.016

Abstract

Abstract:

BACKGROUND: Choosing internal fixator implants with good strength and stiffness is the key to repair femoral neck combined with ipsilateral subtrochanteric fractures.
OBJECTIVE: To compare the biomechanical properties of different implant fixation for femoral neck combined with ipsilateral subtrochanteric fractures.
METHODS: Totally 24 adult antiseptic cadaver specimens were used to produce fracture models with femoral neck fracture combined with 5 cm of ipsilateral subtrochanteri medical cortical defect, and were divided into femoral proximal locking plate group, lengthening proximal femur anti-rotation intramedullary nail group and lengthening proximal femoral nail group according to the random number table method. The results of axial compression test, torsion test and axial compression failure rest in three groups were compared.
RESULTS AND CONCLUSION: The axial compressive stiffness and failure load in lengthening proximal femur anti-rotation intramedullary nail group were significantly greater than those in femoral proximal locking plate group and lengthening proximal femoral nail group, and those in lengthening proximal femoral nail group were significantly greater than those in femoral proximal locking plate group (P < 0.05). The torsional stiffness in femoral proximal locking plate group was significantly greater than that in lengthening proximal femur anti-rotation intramedullary nail group and lengthening proximal femoral nail group, and that in lengthening proximal femur anti-rotation intramedullary nail group was significantly greater than that in lengthening proximal femoral nail group (P < 0.05). The indexes of biomechanical properties of specimens at the 4th and 8th weeks after fixation in three groups were slightly increased compared with those in 0 week after surgery, but the difference was no statistically significant (P > 0.05). These results demonstrate that to a certain extent, compared with the femoral proximal locking plate and lengthening lengthening proximal femoral nail, lengthening proximal femur anti-rotation intramedullary nail fixation for repair of femoral neck combined with ipsilateral subtrochanteric fractures has more biomechanical advantages.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Wang Yan-jun, Hou Jun, Wan Bo, Liu Gang, Niu Gang, Zhang Yang, Dang Xiao-qian. Different implant fixation repairs femoral neck combined with ipsilateral subtrochanteric fractures: comparisons of biomechanical properties[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(13): 1939-1945.

Figures/Tables 4

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