Relationship between tooth shade value and skin color: An observational study

No interaction among age, skin color, and tooth shade or gender, skin color, and tooth shade was found; however, age was associated with tooth shade (P<.001). Older persons were more likely to have teeth with lower values (darker). Among those aged 60 and older, 85% had teeth in the medium and low range values compared with 17% of those younger than 31.