High tibial osteotomy results in improved frontal plane knee moments, gait patterns and patient-reported outcomes
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KNEE
High tibial osteotomy results in improved frontal plane knee moments, gait patterns and patient‑reported outcomes Gemma M. Whatling1,2 · Paul R. Biggs1,2 · David W. Elson2,3 · Andrew Metcalfe2,4,5 · Chris Wilson2,4 · Cathy Holt1,2 Received: 27 February 2019 / Accepted: 23 July 2019 © The Author(s) 2019
Abstract Purpose The purpose of this study was to quantify changes in knee loading in the three clinical planes, compensatory gait adaptations and patient-reported outcome measures (PROMS) resulting from opening wedge high tibial osteotomy (HTO). Methods Gait analysis was performed on 18 participants (19 knees) with medial osteoarthritis (OA) and varus alignment pre- and post-HTO, along with 18 controls, to calculate temporal, kinematic and kinetic measures. Oxford Knee Score, Knee Outcome Survey and visual analogue pain scores were collected. Paired and independent sample tests identified changes following surgery and deviations from controls. Results HTO restored frontal and transverse plane knee joint loading to that of the control group, while reductions remained in the sagittal plane. Elevated frontal plane trunk sway (p = 0.031) and reduced gait speed (p = 0.042), adopted as compensatory gait changes pre-HTO, were corrected by the surgery. PROMs significantly improved (p ≤ 0.002). Centre of pressure (COP) was lateralised relative to the knee post-HTO (p
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