Fig. 5From: Significant race and gender differences in anterior cruciate ligament tibial footprint location: a 3D-based analysisA Sagittal view of a 50° tibial tunnel, and the opening lengths formed by reamers with different diameters (R is the long axis of the elliptical tunnel opening). B Axial view of the tibial tunnel opening (red ellipse). R =  r/sin(50°)Back to article page