Table 2. Association between MSM distal alveolar bone condition and its related influencing factors.
| MSM distal alveolar bone condition | Total | χ2 | p | ||
|---|---|---|---|---|---|
| compressive resorption | inflammatory resorption | ||||
| (N=922) | (N=85) | ||||
| Age | |||||
| 18–25 | 221 | 4 | 225 | 23.120 | 0.000*** |
| (98.2%) | (1.8%) | (100.0%) | |||
| 26–35 | 263 | 39 | 302 | ||
| (87.1%) | (12.9%) | (100.0%) | |||
| 36–45 | 224 | 25 | 249 | ||
| (90.0%) | (10.0%) | (100.0%) | |||
| 46–55 | 107 | 11 | 118 | ||
| (90.7%) | (9.3%) | (100.0%) | |||
| ≥56 | 107 | 6 | 113 | ||
| (94.7%) | (5.3%) | (100.0%) | |||
| Winter’s classification | |||||
| Vertical impaction | 376 | 0 | 376 | 100.294 | 0.000*** |
| (100.0%) | (0.0%) | (100.0%) | |||
| Mesioangular impaction | 232 | 61 | 293 | ||
| (79.2%) | (20.8%) | (100.0%) | |||
| Horizontal impaction | 218 | 23 | 241 | ||
| (90.5%) | (9.5%) | (100.0%) | |||
| Distoangular impaction | 65 | 0 | 65 | ||
| (100.0%) | (0.0%) | (100.0%) | |||
| Other types of impaction | 31 | 1 | 32 | ||
| (96.9%) | (3.1%) | (100.0%) | |||
***p<0.001, indicating a statistically significant difference.