Husby T, Alho A, Rønningen H
University of Oslo, Ullevål Hospital, Orthopedic Service, Norway.
Acta Orthop Scand. 1989 Jun;60(3):299-302. doi: 10.3109/17453678909149281.
Fixation of vertical femoral neck osteotomies in 50 cadavers was performed with either von Bahr screws or a sliding hip compression screw. One specimen from each pair of femora was used for the osteotomy, the other serving as an intact control. At 0.05 r of torsion the load-deformation test showed that three von Bahr screws provided the strongest fixation, and this was confirmed by the the ultimate torsional moment test. Regardless of positioning, even two von Bahr screws were stronger than the sliding compression screw with or without an additional lag screw. The results indicate that the best torsional stability in femoral neck fractures can be obtained with three 5.5-mm screws.
在50具尸体上，使用冯·巴尔螺钉或滑动髋部加压螺钉对股骨颈垂直截骨进行固定。每对股骨中的一个标本用于截骨，另一个作为完整对照。在0.05r扭转时，载荷-变形测试表明，3枚冯·巴尔螺钉提供了最强的固定，这在极限扭转力矩测试中得到了证实。无论位置如何，即使是2枚冯·巴尔螺钉也比带或不带附加拉力螺钉的滑动加压螺钉更强。结果表明，使用3枚5.5毫米螺钉可获得股骨颈骨折最佳的扭转稳定性。
