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The Bone & Joint Journal
Vol. 99-B, Issue 10 | Pages 1313 - 1318
1 Oct 2017
Nakamura R Komatsu N Fujita K Kuroda K Takahashi M Omi R Katsuki Y Tsuchiya H

Aims

Open wedge high tibial osteotomy (OWHTO) for medial-compartment osteoarthritis of the knee can be complicated by intra-operative lateral hinge fracture (LHF). We aimed to establish the relationship between hinge position and fracture types, and suggest an appropriate hinge position to reduce the risk of this complication.

Patients and Methods

Consecutive patients undergoing OWHTO were evaluated on coronal multiplanar reconstruction CT images. Hinge positions were divided into five zones in our new classification, by their relationship to the proximal tibiofibular joint (PTFJ). Fractures were classified into types I, II, and III according to the Takeuchi classification.