Table 1.
The characteristics of the patients (n = 1826).
| Variables | Number (%) | Variables | Number (%) |
|---|---|---|---|
| Gender | Disappearance of periodontal ligament space | ||
| Male | 756 (41.4) | No | 1492 (81.7) |
| Female | 1070 (58.6) | Yes | 334 (18.3) |
| Age (average ± SD) | 31.4 ± 12.4 | Radiographical association between root and inferior alveolar canal | |
| Diabetes mellitus | No association between root structure and the superior border of the canal | 820 (44.9) | |
| No | 1803 (98.7) | Root structure impinging the superior border of canal | 760 (41.6) |
| Yes | 23 (1.3) | Overlapping root structure and canal | 246 (13.5) |
| Immunosuppressor factor | Pell and Gregory classification | ||
| No | 1799 (98.5) | Class I | 475 (26.0) |
| Yes | 27 (1.5) | Class II | 1084 (59.4) |
| Hypertension | Class III | 267 (14.6) | |
| No | 1761 (96.4) | Position A | 772 (42.3) |
| Yes | 65 (3.6) | Position B | 902 (49.4) |
| Cerebral infarction | Position C | 152 (8.3) | |
| No | 1813 (99.3) | Bone removal | |
| Yes | 13 (0.7) | No | 172 (9.4) |
| Drinking habit | Yes | 1654 (90.6) | |
| No | 1484 (81.3) | Tooth sectioning | |
| Yes | 342 (18.7) | No | 173 (9.5) |
| Diarrhea | Yes | 1653 (90.5) | |
| No | 1813 (99.3) | Primary wound closure | |
| Yes | 13 (0.7) | No | 275 (15.1) |
| Comorbidities | Yes | 1551 (84.9) | |
| No | 1473 (80.7) | Postoperative complication | |
| Yes | 353 (19.3) | No | 1643 (90.0) |
| Preoperative use of antibiotic | Yes | 183 (10.0) | |
| No | 1349 (73.9) | Operation time (min ± SD) | 26.5 ± 17.5 |
| Yes | 477 (26.1) | Surgeon’s experience (y ± SD) | 9.0 ± 8.6 |
| Preoperative use of painkiller | |||
| No | 1790 (98.0) | ||
| Yes | 36 (2.0) |