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The characteristics of the third molars
| the eruption degree of the third molars | unerupted | 1/3 erupted | 2/3 erupted | fully erupted | |
|---|---|---|---|---|---|
| maxilla (n = 23) | 1 | 4 | 4 | 14 | |
| mandible (n = 23) | 7 | 12 | 1 | 3 | |
| cortical bone surfaces removal number during the surgery* | 0 | 1 | 2 | 3 | 4 |
| maxilla (n = 23) | 21 | 2 | 0 | 0 | 0 |
| mandible (n = 23) | 5 | 1 | 9 | 6 | 2 |
*The number is counted by corresponding tooth surface (buccal, lingual/palatal, distal, mesial) which was involved in the cortical bone removal during extraction
