Table 5.
Relationship between A-P NF diameter and distance to central incisors at different levels according to NPC type.
| The Relationship between the A-P NF Diameter and Distance to Central Incisors at Different Levels | The NPC Type at the Sagittal Cross-Section | |||
|---|---|---|---|---|
| Banana | Hourglass | Cylindrical | Funnel | |
| The A-P NF diameter vs. A level |
y = 0.5014x + 2.0085 R2= 0.2405 p = 0.004 |
y = −0.0906x + 3.314 R2 = 0.012 p = 0.380 |
y = 0.0047x + 3.3043 R2 = 4 × 10−5 p = 0.958 |
y = −0.1531x + 2.7738 R2 = 0.0234 p = 0.145 |
| The A-P NF diameter vs. B level |
y = 0.462x + 1.8885 R2 = 0.2686 p = 0.002 |
y = −0.0411x + 3.2257 R2 = 0.0035 p = 0.638 |
y = −0.0393x + 3.4429 R2 = 0.0039 p = 0.592 |
y = −0.1346x + 2.821 R2 = 0.0298 p = 0.099 |
| The A-P NF diameter vs. C level |
y = 0.3592x + 1.7279 R2 = 0.1575 p = 0.024 |
y = −0.1267x + 3.6126 R2 = 0.0383 p = 0.115 |
y = −0.0872x + 3.6752 R2 = 0.0201 p = 0.222 |
y = −0.1511x + 3.0373 R2 = 0.058 p = 0.021 |
Significant correlations are bolded in colored fields.