Table 3.
The association between dental-related factors and ORN post dental extraction (N = 389)
| Variable | All extracted teeth | No ORN, n (%) | ORN, n (%) | p value |
|---|---|---|---|---|
| Tooth type | ||||
| Upper single-rooted | 56 (14.4%) | 56 (15.7%) | 0 (0.0%) | |
| Upper double-rooted | 135 (34.7%) | 122 (34.2%) | 13 (40.6%) | < 0.001a* |
| Lower single-rooted | 85 (21.9%) | 84 (23.5%) | 1 (3.1%) | |
| Lower double-rooted | 113 (29.0%) | 95 (26.6%) | 18 (56.2%) | |
| Tooth pathology | ||||
| Periapical periodontitis related | 145 (37.3%) | 136 (39.0%) | 9 (32.1%) | 0.001a* |
| Caries-related | 178 (45.7%) | 164 (47.0%) | 14 (50.0%) | |
| Perio-related | 42 (10.8%) | 42 (12.0%) | 0 (0.0%) | |
| Mixed caries-perio related | 8 (2.1%) | 5 (1.4%) | 3 (10.7%) | |
| Others | 4 (1.1%) | 2 (0.6%) | 2 (7.1%) | |
| No data | 12 (3.1%) | |||
| Procedure | ||||
| Simple extraction | 259 (66.6%) | 249 (69.9%) | 10 (35.7%) | < 0.001b* |
| Surgery | 125 (32.1%) | 107 (30.1%) | 18 (64.3%) | |
| No data | 5 (1.3%) | |||
| Operator | ||||
| Dental officer/postgraduate | 269 (69.2%) | 252 (71.0%) | 17 (63.0%) | 0.379b |
| Specialist | 113 (29.0%) | 103 (29.0%) | 10 (37.0%) | |
| No data | 7 (1.8%) | |||
| Primary closure | ||||
| Yes | 198 (50.9%) | 178 (50.0%) | 20 (71.4%) | 0.029b* |
| No | 186 (47.8%) | 178 (50.0%) | 8 (28.6%) | |
| No data | 5 (1.3%) | |||
| Antibiotic post-extraction | ||||
| Antibiotics prescribed | 339 (87.1%) | 315 (88.7%) | 24 (85.7%) | 0.547a |
| No antibiotic prescribed | 44 (11.3%) | 40 (11.3%) | 4 (14.3%) | |
| No data | 6 (1.5%) | |||
| Within target volume | ||||
| Yes | 107 (27.5%) | 87 (45.3%) | 20 (90.9%) | < 0.001b* |
| No | 107 (27.5%) | 105 (54.7%) | 2 (9.1%) | |
| No data | 175 (45.0%) | |||
| Total dose | ||||
| Below 60 Gy | 122 (31.4%) | 122 (62.6%) | 0 (0.0%) | < 0.001b* |
| 60 Gy and above | 95 (24.4%) | 73 (37.4%) | 22 (100.0%) | |
| No data | 172 (44.2%) | |||
| Time of extraction post radiotherapy | ||||
| 3 months to 1 year | 13 (3.3%) | 13 (3.6%) | 0 (0.0%) | 0.001a* |
| 1–5 years | 103 (26.5%) | 85 (23.8%) | 18 (56.2%) | |
| > 5 years | 273 (70.2%) | 259 (72.5%) | 14 (43.8%) |
*p < 0.05
aFisher’s exact test
bPearson chi-square test