METHODS: First, the stability of the upper ankle joint in seven pairs of intact lower legs were examined. Subsequently, half of the lower legs were treated with PA screw fixation of a PM fracture without SS and the other half with AP screw fixation with additional tricortical SS.
RESULTS: PA OS without SS showed significantly more diastasis (p = 0.027). The AP OS with an SS revealed a diastasis that was comparable with the intact condition (p = 0.797). The use of SS led to significantly higher stability compared to OS without SS (p = 0.019).
CONCLUSIONS: The Fixation of the PM alone without an additional syndesmotic screw cannot achieve intact upper ankle stability. Fixation of a PM fracture with an SS helps in nearly achieving the natural condition.
方法:首先,检查了七对完整小腿的上踝关节的稳定性。随后,小腿的一半用PA螺钉固定治疗无SS的PM骨折,另一半用AP螺钉固定并附加三皮质SS。
结果:无SS的PAOS显示明显更多的舒张(p=0.027)。具有SS的APOS显示出与完整条件相当的舒张(p=0.797)。与没有SS的OS相比,使用SS导致显著更高的稳定性(p=0.019)。
结论:单独固定PM而没有额外的联合韧带螺钉不能获得完整的上踝关节稳定性。用SS固定PM骨折有助于几乎达到自然状态。