Radiological Measurement Of Post-operative Component Of Cementless Total Hip Arthroplasty

This study evaluated the radiographic and clinical outcomes of 26 primary total hip arthroplasties in which a proximally coated anatomically designed femoral was fixed without cement, made them into stable group(19) and instable group(7).The purpose of the study is to compare directly two group radiographic measurements of the femoral and acetabular component of hip prostheses.The measured parameters include as follows:angle of lateral opening of acetabular components,angle of anterior inclining of the acetabular components, superior and interior migration of acetabular components,adduction or abduction of the femoral prostheses stem,offsetting of the hip,ratio of being-filled of femoral medullary . Outcome datas revealed that angle of lateral opening and anterior inclining of the acetabular components is significant to insure the stability of hip prostheses of cementless THR.So as to high ratio of being-filled of femoral medullary .The current study provides practical information for the orthropaedic surgeon trying to keep hip prostheses stable after cementless THR. We suggest the optimum location of cementless THR prostheses: Angle of lateral opening of acetabular components:43°±10°; angle of anterior inclining of the acetabular components: 12°± 5°.