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| Grade | Preoperative | Postoperative |
|---|---|---|
| I | 0 | 4 (8.9%) |
| II | 0 | 12 (26.7%) |
| III | 0 | 15 (33.4%) |
| IV | 0 | 7 (15.5%) |
| V | 3 (6.7%) | 6 (13.3%) |
| VI | 14 (31.1%) | 1 (2.2%) |
| VII | 28 (62.2%) | 0 |
| Normal position (Grade I to IV) | 0 | 38 (84.4%) |
| Incongruent Position (Grade V to VII) | 45 (100%) | 7 (15.6%) |
Statistical analysis with the chi-square test (p < .05)
