Table 1 Preoperative Direction of Glenoid Erosion Patterns and Joint Angles for 231 Shoulders from 202 patients with Osteoarthritis Undergoing Shoulder Replacement
Category | All shoulders (N = 231) | Intact rotator cuff (n = 131) | Torn rotator cuff (n = 100) |
|---|---|---|---|
Direction of glenoid erosion, n (%)a | |||
Posterior-superior | 116 (50.2) | 47 (35.8) | 69 (69) |
Posterior | 102 (44.2) | 73 (55.7) | 29 (29) |
Posterior-inferior | 11 (4.7) | 9 (6.8) | 2 (2) |
Anterior-inferior | 2 (0.9) | 2 (1.5) | 0 (0) |
Joint angles, median (min/max°)b | |||
Inclination angle | 8 (− 23/56) | 6 (−19/24)c | 14 (− 23/56)c |
Version angle | −11 (−55/23) | −13 (− 55/21)d | −9 (− 38/23)d |
Critical shoulder angle | 31.5 (17.6/61.6) | 29.2 (17.6/40.4)e | 36.7 (21.9/61.6)e |