Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
牙根形态异常牙的分布状况
Distribution of teeth with abnormal root morphology
| Item | Teeth level, n (%) |
| Cone-rooted teeth of anterior | 214 (31) |
| Cone-rooted teeth of premolar | 160 (23) |
| Short-rooted teeth | 106 (15) |
| Curved-rooted teeth | 85 (12) |
| Slender-root teeth | 53 (8) |
| Molar root abnormalities | 39 (6) |
| Syncretic-rooted molars | 37 (5) |
| Root abnormalities | 695 (100) |
