Objective To analyze the biomechanics of three-dimensional proximal nail(3DPFN)in the treatment of Evans-Jensen type Ⅳ femoral intertrochanteric fracture.Methods The fourth generation of artificial femur was used to construct the Evans-Jensen type Ⅳfemoral intertrochanteric fracture model,and which was performed with 3DPFN fixation(3DPFN group)and proximal femoral nail antirotation fixation(PFNA group),respectively.The axial stress of the fracture model in human body was simulated,and static ultimate pressure test and dynamic fatigue test were per-formed.Axial static ultimate load,maximum number of cycles and ultimate load before internal fixation failure in dy-namic fatigue test were recorded.Results The static ultimate pressure test showed that the axial static ultimate load of 3DPFN group was higher than that of PFNA group(P<0.05).Dynamic fatigue test results showed that the maxi-mum number of cycles before internal fixation failure in the 3DPFN group was more than that in the PFNA group(P<0.05).The ultimate load before internal fixation failure in 3DPFN group was more than that in PFNA group(P<0.05).Conclusions 3DPFN has obvious biomechanical advantage in the treatment of Evans-Jensen type Ⅳfemoral intertrochanteric fracture.
关键词
股骨转子间骨折/股骨近端髓内钉/生物力学/疲劳试验
Key words
femoral intertrochanteric fractures/proximal femoral nail/biomechanics/fatigue test
维普
万方数据