Table 1.
Our cases, divided on the basis of post-operative diagnosis of Avascular Necrosis (AVN), with their radiographic presentation and anamnestic characteristics.
| Cases who developed AVN | Cases who did not develop AVN | |
|---|---|---|
| Number | 9 | 65 |
| Garden Class. | ||
| Grade 1 | 3 (33%) | 20 (31%) |
| Grade 2 | 3 (33%) | 34 (52%) |
| Grade 3 | 3 (33%) | 11 (17%) |
| Pauwels Class. | ||
| Type 1 | 2 (22%) | 14 (22%) |
| Type 2 | 4 (44%) | 38 (58%) |
| Type 3 | 3 (33%) | 13 (20%) |
| Garden Index Differential | 9.7 (4-14) | 5.0 (0-26) |
| Mean Screw Angle | 133.8 (122-152) | 136.9 (128-148) |
| Smokers | 6 (67%) | 13 (20%) |
| Diabetes | 1 (11%) | 3 (5%) |
| Steroid Ther. | 2 (22%) | 6 (9%) |
| MEAN BMI | 24.3 | 22.8 |
| Surgical Delay | 33.7 | 29.0 |