Description of locating the center of mandibular autorotation using the Reuleaux method.17 Go1 and Go2, gonion point before and after molar intrusion, respectively; Pog1 and Pog2, pogonion point before and after molar intrusion, respectively; R1, perpendicular bisector through Go1-Go2 line; R2, perpendicular bisector through Pog1-Pog2 line.