Biomechanical characteristics of bipolar femoral head prosthesis replacement and internal fixation for femoral neck fractures in the elderly

doi:10.3969/j.issn.2095-4344.2016.26.001

Abstract

Abstract:

BACKGROUND: Bipolar femoral head prosthesis has achieved the desired repair effect in patients with femoral neck fracture, but there is still much controversy on the biomechanical properties of bipolar artificial femoral head prosthesis.

OBJECTIVE: To compare biomechanical properties of the bipolar femoral head prosthesis replacement and internal fixation in the repair of femoral neck fracture in the elderly.

METHODS: Twenty-three (46 sides) senile femoral neck fracture specimens were analyzed and randomized into internal fixation group (n=23) and bipolar femoral head prosthesis replacement group (n=23). Specimens in the internal fixation group underwent conventional metal implant fixation. Specimens in the bipolar femoral head prosthesis replacement group underwent bipolar femoral head prosthesis replacement. Mechanical properties of femoral prosthesis stem were tested on universal testing machine. Biomechanical properties after bipolar femoral head prosthesis replacement and internal fixation were compared.

RESULTS AND CONCLUSION: (1) The maximum load was significantly higher in the bipolar femoral head prosthesis replacement group than in the internal fixation group (P < 0.05). The maximum load trend images showed that the maximum load was significantly higher in the bipolar femoral head prosthesis replacement group than in the internal fixation group (P < 0.05). (2) The displacement in axial pull test was significantly shorter in the bipolar femoral head prosthesis replacement group than in the internal fixation group (P < 0.05). The displacement trend images exhibited that the displacement in axial pull test was significantly shorter in the bipolar femoral head prosthesis replacement group than in the internal fixation group (P < 0.05). (3) These findings suggest that compared with the implant, bipolar femoral head prosthesis replacement in the repair of femoral neck fracture in the elderly is more stable, has better repair effects, can elevate hip function and obtain good initial stability.

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

Key words: Femoral Fractures, Arthroplasty, Replacement, Internal Fixators, Biomechanics, Tissue Engineering

CLC Number:

R318

Jiang Yuan-tao, Jiao Jian-bao, Xue Jin-wei, Wang Yun-fei . Biomechanical characteristics of bipolar femoral head prosthesis replacement and internal fixation for femoral neck fractures in the elderly[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(26): 3805-3810.

Figures/Tables 1

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