Table 4.
Relationship between A-P IF diameter and distance to central incisors at different levels according to NPC type.
| The Relationship between the A-P IF Diameter and Distance to Central Incisors at Different Levels | The NPC Type at the Sagittal Cross-Section | |||
|---|---|---|---|---|
| Banana | Hourglass | Cylindrical | Funnel | |
| The A-P IF diameter vs. A level |
y = 0.2333x + 4.7453 R2= 0.0597 p = 0.178 |
y = −0.1524x + 5.3987 R2 = 0.0327 p = 0.146 |
y = 0.048x + 4.6779 R2 = 0.0021 p = 0.697 |
y = −0.3547x + 6.1968 R2 = 0.0791 p = 6.6 × 10−3 |
| The A-P IF diameter vs. B level |
y = 0.1711x + 4.782 R2 = 0.0422 p = 0.259 |
y = −0.0556x + 5.207 R2 = 0.0061 p = 0.533 |
y = −0.0353x + 4.6703 R2 = 0.0016 p = 0.728 |
y = −0.1137x + 5.7288 R2 = 0.0134 p = 0.272 |
| The A-P IF diameter vs. C level |
y = 0.2562x + 4.3329 R2 = 0.0918 p = 0.092 |
y = −0.1258x + 5.5476 R2 = 0.0362 p = 0.126 |
y = −0.0482x + 4.7548 R2 = 0.0032 p = 0.627 |
y = −0.071x + 5.6832 R2 = 0.0081 p = 0.395 |
Significant correlations are bolded in colored fields.