Table 2. The distribution of three types of topographic relationship between lingual plate and impacted third molar root on the cross-sectional CBCT view.
| Relationship between lingual plate and impacted third molar root | ||||
|---|---|---|---|---|
| Non-Contact | Contact | Perforation | P-value | |
| Age | 99 | 145 | 120 | |
| 18–25 | 37 | 68 | 44 | 0.3733 |
| 26–35 | 39 | 44 | 48 | |
| ≥36 | 23 | 33 | 28 | |
| Gender | ||||
| Male | 41 | 75 | 79 | 0.0013 |
| Female | 58 | 70 | 41 | |
| Impaction Depth | ||||
| Class A | 18 | 52 | 29 | <0.0001 |
| Class B | 53 | 78 | 82 | |
| Class C | 28 | 15 | 9 | |
| Number of Roots | ||||
| Single root | 36 | 50 | 23 | 0.0067 |
| Multi-root | 63 | 95 | 97 | |
| Morphology of Lingual Plate | ||||
| Parallel | 28 | 20 | 11 | 0.0010 |
| Undercut | 38 | 64 | 73 | |
| Slanted | 29 | 54 | 31 | |
| Round/Convex | 4 | 7 | 5 | |
The numbers in bold indicate statistically significant with P-values less than 0.05.