From: Insufficient blood supply of fovea capitis femoris, a risk factor of femoral head osteonecrosis
Characteristic | Non-traumatic osteonecrosis (N = 118) | Traumatic osteonecrosis (N = 31) | P-value |
---|---|---|---|
Number of nutrient foramina | 0.142 | ||
0 | 102 (86.44%) | 24 (77.42%) | |
1–3 | 16 (13.56%) | 6 (19.35%) | |
4–6 | 0 (0.00%) | 0 (0.00%) | |
> 6 | 0 (0.00%) | 1 (3.23%) | |
Area | |||
Total area of nutrient foramina, mm2 | 0.23 ± 0.85 | 0.59 ± 1.22 | 0.131 |
Mean area of nutrient foramina, mm2 | 0.15 ± 0.54 | 0.22 ± 0.47 | 0.481 |
Diameter | |||
Maximum diameter of the nutrient foramen, mm | 0.15 ± 0.46 | 0.29 ± 0.56 | 0.171 |
Minimum diameter of the nutrient foramen, mm | 0.12 ± 0.36 | 0.21 ± 0.42 | 0.248 |