title: Effect of age and length of residence in a fluoridated area on root surface fluoride concentration.
mesh_terms: D000367:Age Factors; D005457:Fluoridation; D005459:Fluorides / Q000032:analysis*; D006801:Humans; D013997:Time Factors; D014092:Tooth Root / Q000032:analysis*
chemical_list: D005459:Fluorides