The points and lines used for measurements. O1 and O2 points: The most lateral points of the ramus, RT: Ramus tangent, PL1: Perpendicular line 1, PL2: Perpendicular line 2, PL3: Perpendicular line 3, CN1 and CN2 points: The intersections between the PL2 and the posterior (CN1) and anterior (CN2) of the condylar neck