変形性膝関節症に対するＰＣＡ型人工膝関節置換術のＸ線学的検討 ａｎｔｅｒｉｏｒ ｓｕｂｓｉｄｅｎｃｅの危険因子について

Abstract

We evaluated 38 porous-coated anatomic total knee arthroplasties in 32 patients with osteoarthritis, performed from 1985 to 1992. Anterior subsidence shown by radiographic assessment of tibial components occurred in 14 knees (36.8%), all of which were arthroplasties without cement. Anterior subsidence occurred significantly more frequently in groups in which the tibial component crossed at an almost vertical angle of 87°-90° with the tibial shaft axis in the lateral view, and also in those subjects whose bone mineral density of the distal radius (1/6 site) was low. There was a tendency for the tibial component to be covered incompletely with the anterior cortical bone of the proximal tibia.