Figure 1.
Cross-section of teeth for ion-exchange experimentation (a) teeth in acrylic for sectioning and (b) horizontal section of teeth for ion-exchange experimentation.
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.