Pritchett J W, Perdue K D
University of Washington, Seattle.
J Pediatr Orthop. 1988 Jul-Aug;8(4):385-8. doi: 10.1097/01241398-198807000-00001.
We performed three-dimensional force analyses on the hips of 50 normal patients and 50 patients with slipped capital femoral epiphysis to determine if mechanical factors alone could account for slips. We found that slipped epiphysis patients have reduced resistance to shear because of increased body weight and a decreased neck shaft-plate shaft angle. Slipped epiphysis patients have relative retroversion, and this generates increased sagittal plane shear stress at the proximal femoral growth plate. We suggest that, during running, these mechanical factors cause shear failure of the growth plate in obese adolescents.
我们对50名正常患者和50名股骨头骨骺滑脱患者的髋关节进行了三维力分析，以确定单纯机械因素是否可导致滑脱。我们发现，由于体重增加和颈干-板轴角减小，骨骺滑脱患者的抗剪切力降低。骨骺滑脱患者存在相对的股骨后倾，这会在股骨近端生长板处产生增加的矢状面剪切应力。我们认为，在跑步过程中，这些机械因素会导致肥胖青少年生长板发生剪切性破坏。
