Fig. 2

Schematic representation of the mechanism by which cup inclination set to external frame during surgery \(\:\alpha\:\) and pelvic inclination \(\:\beta\:\) affect the cup inclination \(\:\varTheta\:\).

Schematic representation of the mechanism by which cup inclination set to external frame during surgery \(\:\alpha\:\) and pelvic inclination \(\:\beta\:\) affect the cup inclination \(\:\varTheta\:\).