Snyder Ryan R, Williams John L, Schmidt Thomas L, Salsbury Thomas L
Department of Orthopaedic Surgery, University of Missouri-Kansas City, Kansas City, MO, USA.
J Pediatr Orthop. 2006 May-Jun;26(3):295-9. doi: 10.1097/01.bpo.0000214906.70045.78.
Slipped capital femoral epiphysis was produced in 9 matched pairs of fresh-frozen pig femurs (1-year-old pigs) by twisting the femoral head about the femoral neck axis. Each matched pair was fixed with a single steel cannulated screw on one side and 2 screws contralaterally, after which the perichondrium was removed before retesting. Double-screw fixation without the perichondrium provided 43% of the stiffness and 74% of the strength of the intact physis in torsion and approximately double the stiffness and strength of single-screw fixation (P<0.004). This information may be of use to the surgeon concerned about rotational stability in unstable slipped capital femoral epiphysis.
通过围绕股骨颈轴扭转股骨头，在9对新鲜冷冻猪股骨（1岁猪）中制造了股骨头骨骺滑脱。每对匹配的股骨一侧用一枚空心钢钉固定，另一侧用两枚钢钉固定，之后在重新测试前去除骨膜。没有骨膜的双螺钉固定在扭转时提供了完整骺板43%的刚度和74%的强度，并且刚度和强度约为单螺钉固定的两倍（P<0.004）。该信息可能对关注不稳定型股骨头骨骺滑脱旋转稳定性的外科医生有用。
