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.
Representative fluorescent images of cross-sections of (A) healthy enamel and (C) demineralized enamel. Inset: photograph of a demineralized enamel block showing a white spot lesion on the tooth sample (red square). XRD spectra of (B) healthy enamel surface and (D) enamel surface with the caries-like lesions.
