Hagiwara M
Department of Orthopaedic Surgery, School of Medicine, Chiba University, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1995 Nov;69(11):1147-57.
In order to evaluate the morphological features of the proximal femur in the Japanese, 100 femora of normal Japanese subjects (normal group) and 60 femora of 43 Japanese patients with secondary osteoarthrosis of the hip (OA group) were analyzed using CT images. The scans for the dried bones (normal group) were done at a setting of 80 kV and 20 mA, for 2 sec duration. The scans were reconstructed using the soft tissue algorithm built into the GE-9800 scanner. The patient scans (OA group) were done at 120 kV and 170 mA also for 2 sec duration, and reconstructed using the same bone algorithm. The results were as follows: 1) Thinning of the femoral cortex occurred in normal females over 60 years of age. 2) The canal flare index at the proximal part of the femoral diaphysis was negatively correlated with the canal diameter at the isthmus. The index at the upper part was greater than that at the lower part. The two groups showed no statistical difference in this index. 3) In the metaphysis, the canal flare index at the anterior portion was twice that at the posterior portion. In absolute terms, the OA group had a reduced flare or curve along the medial portion. 4) In cross-section, the canal shape of the diaphysis was more elliptical in the OA group than in the normal group. The longitudinal axis of the canal was directed more sagittally in the OA group than in the normal group.
为评估日本人股骨近端的形态学特征，利用CT图像对100例正常日本受试者的股骨（正常组）和43例日本髋关节继发性骨关节炎患者的60例股骨（骨关节炎组）进行了分析。对干燥骨骼（正常组）的扫描在80 kV和20 mA的条件下进行，持续2秒。扫描图像用GE - 9800扫描仪内置的软组织算法进行重建。对患者的扫描（骨关节炎组）在120 kV和170 mA的条件下同样持续2秒进行，并使用相同的骨算法进行重建。结果如下：1）60岁以上的正常女性出现股骨皮质变薄。2）股骨干近端的髓腔扩张指数与峡部的髓腔直径呈负相关。上部的指数大于下部。两组在该指数上无统计学差异。3）在干骺端，前部的髓腔扩张指数是后部的两倍。从绝对值来看，骨关节炎组沿内侧部分的扩张或弯曲程度减小。4）在横截面上，骨关节炎组骨干的髓腔形状比正常组更呈椭圆形。骨关节炎组髓腔的纵轴比正常组更偏向矢状位。
