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.
An example from both groups; PRP tooth #11 vs. PRF tooth #21: Necrotic immature fractured teeth with an open apex in an 9-years-old boy and 8-years old girl respectively. (A) Pre-operative periapical radiograph; (B) After the placement of mineral trioxide aggregate; (C) At 6-month follow-up, with development of the root; (D) At 12-month follow-up, with continued development of the root apex.
