Akamatsu Y, Koshino T, Saito T, Wada J
Department of Orthopaedic Surgery, Yokohama City University, School of Medicine, Japan.
Clin Orthop Relat Res. 1997 Jan(334):207-14.
Radiographically demonstrated osteosclerosis was quantitatively evaluated in knees with medial compartmental osteoarthritis by dual xray absorptiometry. Bone density was measured in various areas of 144 knees with medial compartmental osteoarthritis, 23 knees of which were treated with high tibial osteotomy. The bone mineral density of the medial femoral and tibial condyles was greater than that of the lateral femoral and tibial condyles in all knees with medial compartmental osteoarthritis. The ratios of bone mineral density of the medial condyles to that of the lateral condyles were found to increase significantly with the progression of osteoarthritis. There was a significant positive regression line correlation between those ratios and the increase of varus deformity as expressed by the standing femorotibial angle. The former were calculated to be 1.0 when the latter was nearly 170 degrees (10 degrees anatomic valgus angulation). The ratio of bone mineral density of the medial femoral condyles to the lateral femoral condyles decreased sharply in all 23 knees within 1 year after high tibial osteotomy.
通过双能X线吸收法对内侧间室骨关节炎膝关节的影像学显示的骨质硬化进行定量评估。对144例内侧间室骨关节炎膝关节的不同区域进行骨密度测量，其中23例膝关节接受了高位胫骨截骨术治疗。在所有内侧间室骨关节炎膝关节中，股骨内侧髁和胫骨内侧髁的骨密度均高于股骨外侧髁和胫骨外侧髁。发现内侧髁与外侧髁的骨密度比值随着骨关节炎的进展而显著增加。这些比值与站立位股胫角所表示的内翻畸形增加之间存在显著的正回归线相关性。当站立位股胫角接近170度（解剖外翻角10度）时，计算得出前者为1.0。在高位胫骨截骨术后1年内，所有23例膝关节的股骨内侧髁与外侧髁的骨密度比值均急剧下降。
