2.2. Analysis.
Comparison 2: Different grafting materials for alveolar ridge preservation, Outcome 2: Allograft versus xenograft: changes in height of alveolar ridge (mm)
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.