Bennet G C, Koreska J, Rang M
J Pediatr Orthop. 1984 Sep;4(5):574-8.
Standard radiographs taken at right angles to each other during the pinning of a slipped capital femoral epiphysis may not demonstrate pins protruding into the joint. In this study roentgenograms of 110 patients (148 hips) with slipped capital femoral epiphyses were analysed by a three-dimensional mathematical model of the femoral head and pin position. A computer was used to determine the spatial distance between the tip of the pin and the subchondral bone of the femoral head. Pin protrusion was found in 41 hips. In 22, protrusion was sufficient to have transgressed the joint space. Pin protrusion did not, however, appear to increase the risk of chondrolysis.
在股骨颈滑脱固定过程中相互垂直拍摄的标准X线片可能无法显示钢针穿入关节。在本研究中，通过股骨头和钢针位置的三维数学模型分析了110例（148髋）股骨颈滑脱患者的X线片。使用计算机确定钢针尖端与股骨头软骨下骨之间的空间距离。发现41髋存在钢针穿出。其中22髋的穿出足以越过关节间隙。然而，钢针穿出似乎并未增加关节溶解的风险。
