Mylène Jansen

CT subchondral bone changes after KJD 383 18 Figure 2 : Average weight-bearing tibiofemoral subchondral cortical bone thickness of patients with predominantly medial compartmental osteoarthritis (n=14), before (T0), 1 (T1) and 2 years (T2) after treatment with knee joint distraction, looking at the femoral articular surface from below and the tibial articular surface from above. One year after treatment, the cortical subchondral bone plate thickness at the medial weight- bearing femur and tibia of the predominantly medial compartmental OA patients decreased by up to 0.25 mm, as shown in Figure 3. Between 1 and 2 years after treatment, bone thinning was relatively small compared to that in the first year, showing a marginal bone thickness decrease on the lateral side as well. Cortical bone thickness around the joint margins seemed to increase between 1 and 2 years post-treatment. None of the changes reached statistical significance. Patients with a predominantly lateral compartmental OA showed a similar pattern, showing a decrease especially on the lateral side (Supplementary Figure S1).