抄録
As total hip arthroplasty for coxarthrosis, recently bipolar hemiarthroplasty or cementless hip prosthesis are mostly coming to be of use though their painelimination does not seem to take effect distinctly. We've been adopting medullary cavity supporting type stem with cement. Since 1988 MX-1 hip prosthesis has been used, which fits well to the medullary cavity of proximal femur of Japanese coxarthrosis. We have this MX-1 type adopted to 91 joints of 81 cases for these 4 and a half years. The average age of the operated patients is 67.7, which is cemparatively high age. After operational develpment condition is good, though it is still short a period. We have not seen the loosening cases, while pain-elimination effect being stable so far.
