have iron-tipped teeth that help them to rip their prey apart, according to new research. The metal is concentrated in the ...

we quickly realised that iron was concentrated along the cutting edges and tooth tips, but not on other parts of the tooth,” LeBlanc says. “This also precisely matches the orange staining we ...

There are three primary categories of teeth discoloration: extrinsic, intrinsic, and age-related stains. Extrinsic stains affect the outer enamel layer of the tooth and are typically caused by ...