[Lateral hinge fractures in open wedge high tibial osteotomy]
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S Schröter1, A Ateschrang, C Ihle
1BG Unfallklinik Tübingen, Klinik für Unfall- und Wiederherstellungschirurgie, Eberhard Karls Universität Tübingen, Schnarrenbergstraße 95, 72076, Tübingen, Deutschland, schroeter.steffen@t-online.de.
Background:
Open wedge high tibial osteotomy (HTO) is an increasingly more common surgical method. A typical problem of this procedure is fracture of the lateral hinge.
Objectives:
The aims of this article are to present the special issue of fractures of the lateral hinge after HTO and to discuss surgical hints on how to prevent and treat this problem.
Methods:
The results of recently published clinical studies are summarized and tips from own clinical experiences are given.
Results:
Type II fractures of the lateral hinge are unstable and can create a major problem. Using short spacer plates results in a problem of stability for all types of fractures.
Conclusion:
The classification into Takeuchi grades I-III has been proven to be suitable for fractures of the lateral hinge. The TomoFix plate is a safe implant to stabilize the osteotomy in type I and III fractures with which healing can be achieved with no problems. Type II fractures can be stabilized with the TomoFix plate; however, an autologous bone graft has to be taken into consideration. For fractures of the lateral hinge short spacer plates are not recommended due to stability issues.
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