Table 2 Increasing angles via the posterior approach from the obturator externus to the piriformis. The muscle name indicates the increased angle measured after muscle resection. The data are presented as averages ± standard deviations
Obturator externus | Inferior gemellus | Obturator internus | Superior gemellus | Piriformis | Ischiofemoral ligament | |
|---|---|---|---|---|---|---|
Hip flexion 0° | 1.6° ± 2.2° | 2.4° ± 1.6° | 3.2° ± 3.0° | 5.3° ± 2.9° | 4.5° ± 4.1° | 10.5° ± 3.1° |
Hip flexion 30° | 0.8° ± 2.9° | 1.9° ± 3.4° | 4.7° ± 4.2° | 4.8° ± 3.7° | 3.3° ± 5.9° | 18.1° ± 4.8° |
Hip flexion 60° | 0.6° ± 3.4° | 1.5° ± 2.5° | 3.2° ± 4.0° | 2.9° ± 5.6° | 1.8° ± 5.6° | 13.3° ± 10.9° |