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.
Topographic surface maps (magnification ×20) of representative specimens of Group 4 (whitening toothpaste + mouthwash) before (a) and after (b) the treatments. Both groups (3 and 4) presented similar morphology after toothbrushing with smoother surfaces but more heterogeneous with numerous large and deep craters and other surface features
