图 2. 先天缺失6颗恒牙患者的全景片.
Fig 2 Panoramic radiographs of the patient with 6 permanent teeth agenesis
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.