动力髋螺钉螺旋刀片固定用于股骨颈骨折的抗压和防旋能力

doi:10.3969/j.issn.2095-9400.2019.08.011

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Abstract Objective: To compare the anti-compression and anti-rotation ability of dynamic hip screw-blade (DHS-B) fixation in the treatment of femoral neck fractures. Methods: 8 femoral neck fracture specimens from 4 adult cadavers were prepared and divided into 2 groups. The observation group was treated with DHS-B fixation, while the control group was treated with 3 cannulated compression screws (CCS) fixation. Axial compression test, horizontal torsion test and axial compression test were adopted to evaluate the anti-compression and anti-rotation ability of the 2 stationary schemes. Results: With 500N axial load, the axial and medial strain of the femoral head in the observation group was significantly lower than those in the control group (P<0.05), there was no significant difference between the 2 groupsin the displacement of the femoral head (P>0.05). With 6 degrees torsion angle, there was no significant difference in torque between the 2 groups (P>0.05). The maximum axis carrying capacity of the observation group was higher than that of the control group (P<0.05). Conclusion: DHS-B has reliable ability of anti-rotation and anti-compression. It is suitable for the treatment of femoral neck fracture.

Key words： dynamic hip screw-blade femoral neck fracture fracture fixation biomechanics

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	Articles by authors
	WU Jun
	YANG Chengwei
	ZHU Liulong
	CHEN Liang

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https://xb.wmu.edu.cn/EN/10.3969/j.issn.2095-9400.2019.08.011 OR https://xb.wmu.edu.cn/EN/Y2019/V49/I8/603

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