Fig. 3
From: Overstuffing in resurfacing hemiarthroplasty is a potential risk for failure
1 Radiograph of a right shoulder. Anatomical circle with center of rotation (blue) and postoperative center of rotation (yellow). The distance in millimeters between the both centers was measured. 2 Radiograph of a right shoulder, demonstrating the anatomical circle (blue) and the implant matched circle (yellow) and the 4 quadrants. LS, lateral superior; MS, medial superior; MI, medial inferior; LI, lateral inferior