Effect of High Tibial Osteotomy on the Distribution of Subchondral Bone Density Across the Proximal Tibial Articular Surface of the Knee With Medial Compartment Osteoarthritis

Background: The effect of high tibial osteotomy (HTO) on the stress distribution across knee joint is not completely understood. Subchondral bone density considered to reflect pattern a surface. Purpose: To assess subchondral proximal tibia in nonarthritic knees and patients with osteoarthritis (OA) before after HTO. Study Design: Cohort study; Level evidence, 3. Methods: We retrospectively collected radiological computed tomography data from 16 without OA (control group) 17 OA. Data group were 1.5 years was assessed tomography–osteoabsorptiometry. locations percentages represented by high-density areas (HDAs) articular surface quantitatively analyzed. Results: ratio HDA medial compartment total (medial ratio) significantly higher preoperative (mean, 80.1%) than control (61.3%) ( P < .001). After HTO, decreased 75.1% = .035 comparison values) correlated hip-knee-ankle angle both groups: r −0.551; .033) −0.528; .043). change HTO 0.587; .035). In compartment, most lateral region 4 subregions increased but that 3 decreased. Conclusion: this exploratory study, shifted toward compartment. contrast, This may result distribution.