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Change of joint-line convergence angle should be considered for accurate alignment correction in high tibial osteotomy

Knee Surgery & Related Research 2021년 33권 1호 p.4 ~ 4
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Abstract


Background: The alignment correction after high tibial osteotomy (HTO) is made both by bony correction and soft-tissue correction around the knee. Change of the joint-line convergence angle (JLCA) represents the soft-tissue correction after HTO, which is the angle made by a tangential line between the femoral condyles and the tibial plateau. We described the patterns of JLCA change and related factors after HTO and investigated the appropriate preoperative planning method.

Methods: Eighty patients who underwent HTO between 2013 and 2016 were included for this retrospective study. Standing, whole-limb radiograph, supine knee anteroposterior (AP) and lateral were measured on the preoperative and postoperative radiographs. The patterns of JLCA changes and related factors were analyzed.

Results: JLCA decreased by a mean of 0.9°?±?1.2° (P?
Conclusions: Surgeons should consider the effect of the JLCA change during the preoperative planning and intraoperative procedure to avoid unintended overcorrection.

키워드

Knee; Osteoarthritis; High tibial osteotomy; Alignment; Joint-line convergence angle

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