Fig. 9.
Polyether impression material (Impregum F, 3M ESPE, Seefeld, Germany) was used for group 1 to 4 (left) and VPS impression material was used for group 5.
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.