移位性踝关节骨折经下胫腓联合螺钉取出后下胫腓联合的影像学转归

The radiographic fate of the syndesmosis after trans-syndesmotic screw removal in displaced ankle fractures.

作者信息

Jordan Thomas H, Talarico Ross H, Schuberth John M

机构信息

Kaiser Permanente Medical Group, Santa Rosa, CA, USA.

出版信息

J Foot Ankle Surg. 2011 Jul-Aug;50(4):407-12. doi: 10.1053/j.jfas.2011.03.014. Epub 2011 May 18.

Abstract

The purpose of this study was to evaluate the radiographic changes of the tibiofibular position and the ankle mortise after removal of trans-syndesmotic fixation to determine if there is loss or maintenance of correction. In addition, the effect of the type of rotational injury, early weight bearing, and the number of trans-syndesmotic screws used on the integrity of the inferior tibiofibular articulation or ankle mortise after screw removal were evaluated. An analysis was conducted of 86 patients, with an unstable rotational ankle fracture requiring open reduction with syndesmosis screw stabilization. Routine radiographic parameters were measured just after open reduction and just before syndesmotic screw removal. There was a high correlation of loss of the integrity of the syndesmotic parameters after screw removal. However, the medial clear space of the ankle changed an insignificant amount, suggesting that although there appears to be some loss of maintenance, the talus did not shift laterally at the expense of a mobile syndesmosis. Ankle injuries requiring stabilization of syndesmotic instability with use of temporary trans-syndesmotic fixation achieve a stable ankle mortise after removal. Tibiofibular diastasis is commonplace upon removal of the syndesmotic hardware, but the ankle mortise remains unchanged. Based on the radiographic criteria described in this study, the postoperative change in medial clear space or tibiofibular diastasis has no bearing on fracture type, deltoid injury, or the use of 1 or 2 cortical screws. As such, other unknown mechanisms affecting the integrity of the syndesmosis after screw removal are in place.

摘要

本研究的目的是评估去除经下胫腓联合固定后胫腓位置及踝关节榫眼的影像学变化,以确定是否存在矫正丢失或维持情况。此外,还评估了旋转损伤类型、早期负重以及所使用的经下胫腓联合螺钉数量对去除螺钉后下胫腓关节或踝关节榫眼完整性的影响。对86例不稳定旋转型踝关节骨折患者进行了分析,这些患者需要切开复位并使用下胫腓联合螺钉固定。在切开复位后及去除下胫腓联合螺钉前测量常规影像学参数。去除螺钉后,下胫腓联合参数完整性的丢失具有高度相关性。然而,踝关节内侧间隙变化不显著,这表明尽管似乎存在一定程度的维持丢失,但距骨并未以可活动的下胫腓联合为代价向外移位。需要使用临时经下胫腓联合固定来稳定下胫腓联合不稳定的踝关节损伤,在去除固定后可获得稳定的踝关节榫眼。去除下胫腓联合固定器械后,胫腓分离很常见,但踝关节榫眼保持不变。根据本研究中描述的影像学标准,术后内侧间隙或胫腓分离的变化与骨折类型、三角韧带损伤或使用1枚或2枚皮质骨螺钉无关。因此,在去除螺钉后,存在影响下胫腓联合完整性的其他未知机制。

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