Fig. 2From: Ability of an intentionally smaller anterior than posterior gap to reduce the sagittal tibial slope in opening wedge high tibial osteotomyBland-Altman plots of differences between preoperative planned and postoperatively measured anterior (a) and posterior (b) opening gap heights on 3D CT. Solid line, mean difference; short broken line, mean difference ± 1.96 standard deviations (SDs); long broken line, zero value of x-axisBack to article page