title: Inorganic pyrophosphate in parotid saliva and its relation to calculus formation.
mesh_terms: D000328:Adult; D002648:Child; D002854:Chromatography, Paper; D003124:Colorimetry; D003728:Dental Calculus / Q000209:etiology*; D011756:Diphosphates / Q000032:analysis*; D006801:Humans; D010306:Parotid Gland / Q000502:physiology*; D012463:Saliva / Q000032:analysis* / Q000502:physiology
chemical_list: D011756:Diphosphates