Medial Open Wedge High tibial Osteotomy (MOWHTO) does not relevantly alter patellar kinematics: a cadaveric study

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ORTHOPAEDIC SURGERY

Medial Open Wedge High tibial Osteotomy (MOWHTO) does not relevantly alter patellar kinematics: a cadaveric study Felix Greimel1 · Guenther Maderbacher1 · Clemens Baier1 · Bernd Krieg1 · Florian Zeman2 · Joachim Grifka1 · Armin Keshmiri3 Received: 12 December 2019 / Accepted: 16 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020

Abstract Purpose  The purpose of this study was to quantify the influence of medial open wedge high tibial osteotomy on patellar kinematics using optical computer navigation, as anterior knee pain infrequently occurs postoperatively and the reason is still being unknown. Methods  Ten medial open wedge high tibial osteotomies at supratuberosity level in 5 full body specimens were performed. The effect of the surgical procedure on patellar kinematics, measured at 5 and 10 degrees of leg alignment correction angle, was analyzed and compared to native patellar kinematics during passive motion—regarding patella shift, tilt, epicondylar distance and rotation. Linear mixed models were used for statistical analysis, a two‐sided p value of ≤ 0.05 was considered statistically significant. Results  Tilt behavior, medial shift and epicondylar distance did not show a significant difference regarding natural patellar kinematics at both osteotomy levels. Both osteotomy correction angles showed a significant less external rotation of the patella (p