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.
The Kaplan-Meier survival analysis. (a) Survival rate of the implants in grafted bone sites: autogenous, xenogenic, and alloplastic. (b) Relation between implant survival rates and remaining bone height: <4 mm and ≥4 mm. (c) Relation between implant survival rates and sinus membrane perforation.
