title: [Composition of tartar: a semi-1uantitative study].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003728:Dental Calculus / Q000032:analysis*; D006801:Humans; D008875:Middle Aged; D014131:Trace Elements / Q000032:analysis*
chemical_list: D014131:Trace Elements
vernacular_title: Los oligoelementos del tartaro. Estudio espectroquimico semi-cuantitativo