Number of Hips | Mechanical alignment guide | Inclinometer | p-value | Stulberg positioner | Capello positioner | p-value | |
---|---|---|---|---|---|---|---|
Demographics | |||||||
Number of hips | 150 | 50 | 50 | – | 50 | 50 | – |
Gender (m: f) | 62: 88 | 19: 31 | 23: 27 | 0.42 | 23: 27 | 20: 30 | 0.55 |
Age at surgery in years (mean, SD) | 61 (15) | 59 (13) | 59 (18) | 0.76 | 59 (18) | 65 (13) | 0.07 |
BMI in kg/m2 (mean, SD) | 31 (6) | 28 (5) | 30 (6) | 0.14 | 30 (6) | 32 (6) | 0.13 |
Fat thickness in cm (mean, SD) | 7 (3) | 7 (2) | 7 (3) | 0.99 | 7 (3) | 7 (2) | 0.99 |
Diagnosis | |||||||
Primary osteoarthritis | 113 | 41 | 39 | – | 41 | 46 | – |
Secondary osteoarthritis due to | |||||||
Developmental dysplasia | 19 | 5 | 4 | – | 5 | 2 | – |
Avascular necrosis | 6 | 1 | 2 | – | 2 | 1 | – |
Other (e.g fracture, Perthe’s, failed ORIF) | 12 | 3 | 5 | – | 2 | 1 | – |
Acetabular Implants | |||||||
CSF (JRI, London UK) | 64 | – | – | – | – | – | – |
Trident (Stryker Orthopaedics, Mahwah, NJ, USA) | 11 | – | – | – | – | – | – |
G7 (Zimmer Biomet, Warsaw, IN, USA) | 75 | – | – | – | – | – | – |