关键词: 髋臼高位放置, 全髋关节置换术；翻修；股骨；假体；有限元分析

Abstract: Objective:To study the effect of the high acetabular position on stress of femoral prosthesis.Methods:In Mimics 17.0 and Geomagic 2012，the patient’s hip CT image was fitted to the NUBES surface.In CERO 4.0，the threedimensional solid model of prosthesis was designed according to the revision system.The above models was imported into hypermesh and assembled according to the length of the proximal femoral components，model A（75mm），model B（85mm），model C（95mm），model D（105mm）.In Abaqus6.14，the distal femur was constrained as the boundary condition，and a single foot standing load was loaded to calculate the maximum Mises stress of the femur prosthesis and the shear stress of the coronal plane（XZ plane）.Results:There was no statistically significant difference between the maximum Mises stress distribution of model B and model A（P>0.05）.Compared with the model B，the compressive stress significantly increased at Ⅴarea in the model C（P<0.05）.In model D，the tensile stress inⅠarea and the compressive stress inⅤarea were significantly larger than that in model C（P<0.05）.In model A，shear stress mainly appeared in Ⅶ area，the shear stress was significantly greater thanⅠand Ⅲ areas（P<0.05）.In the model C and D，The maximum shear stress change of femoral prosthesis in Ⅲ and Ⅴareas，there were significant statistically differences compared with model A（P<0.05）.Conclusion:High placement technique in total hip arthroplasty may not only lead to the increase of tensile stress and compressive stress at the distal femoral prosthesis，but also increased the femoral prosthesis bone contact interface shear stress.We should pay attention to the length，diameter，coating and other factors of the femoral prosthesis that affect the stability of the prosthesis.

Key words: high acetabular position, total hip arthroplasty, revision, femoral, prosthesis, finite element analysis