Table 4.
Comparison of inter-root distance between estimated and actual tooth models in manual method (unit: mm)
| Estimated tooth model | Actual tooth model | P value* | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Max | Min | Mean | SD | Max | Min | ||
| Maxilla, Rt | |||||||||
| Inter-root distances between U6 and U5 | 9.4 | 1.0 | 10.6 | 8.0 | 8.8 | 0.7 | 9.6 | 8.1 | 0.138 |
| Inter-root distances between U5 and U3 | 6.4 | 0.9 | 7.3 | 5.1 | 6.8 | 0.7 | 7.6 | 6.0 | 0.089 |
| Inter-root distances between U3 and U2 | 10.7 | 2.0 | 12.6 | 8.6 | 10.5 | 0.8 | 11.7 | 9.8 | 0.709 |
| Inter-root distances between U2 and U1 | 6.6 | 2.4 | 9.7 | 4.3 | 6.3 | 1.4 | 8.1 | 5.0 | 0.535 |
| Maxilla, Lt | |||||||||
| Inter-root distances between U6 and U5 | 8.6 | 0.8 | 9.9 | 7.7 | 8.8 | 0.5 | 9.3 | 8.3 | 0.531 |
| Inter-root distances between U5 and U3 | 4.9 | 1.8 | 7.6 | 2.5 | 5.3 | 1.4 | 6.8 | 3.7 | 0.421 |
| Inter-root distances between U3 and U2 | 9.6 | 2.5 | 12.9 | 6.1 | 9.8 | 2.0 | 11.8 | 6.5 | 0.673 |
| Inter-root distances between U2 and U1 | 6.4 | 2.2 | 9.8 | 4.1 | 5.9 | 1.4 | 7.7 | 4.1 | 0.408 |
| Mandible, Rt | |||||||||
| Inter-root distances between L6 and L5 | 7.4 | 1.3 | 8.6 | 5.2 | 7.3 | 0.9 | 8.5 | 6.4 | 0.834 |
| Inter-root distances between L5 and L3 | 5.9 | 0.7 | 6.7 | 5.2 | 6.7 | 1.4 | 9.0 | 5.5 | 0.165 |
| Inter-root distances between L3 and L2 | 6.7 | 1.1 | 8.2 | 5.4 | 6.8 | 1.0 | 7.8 | 5.6 | 0.537 |
| Inter-root distances between L2 and L1 | 4.7 | 1.5 | 6.9 | 3.2 | 4.3 | 0.7 | 5.3 | 3.7 | 0.338 |
| Mandible, Lt | |||||||||
| Inter-root distances between L6 and L5 | 8.2 | 1.5 | 9.8 | 5.9 | 7.7 | 1.5 | 9.7 | 5.5 | 0.072 |
| Inter-root distances between L5 and L3 | 6.5 | 1.3 | 8.5 | 5.5 | 7.2 | 1.3 | 9.1 | 6.0 | 0.141 |
| Inter-root distances between L3 and L2 | 7.2 | 1.2 | 9.3 | 6.2 | 7.1 | 1.4 | 8.9 | 5.5 | 0.702 |
| Inter-root distances between L2 and L1 | 4.5 | 0.4 | 5.1 | 4.1 | 4.3 | 0.5 | 4.8 | 3.5 | 0.410 |
SD, Standard deviation
*The results of paired t test. U6, maxillary first molar; U5, maxillary second premolar; U3, maxillary canine; U2, maxillary lateral incisor; U1, maxillary central incisor. L6, mandibular first molar; L5, mandibular second premolar; L3, mandibular canine; L2, mandibular lateral incisor; L1, mandibular central incisor