title: Characterization of aluminium radiopacity standards for restorative materials.
mesh_terms: D015502:Absorptiometry, Photon; D000497:Alloys; D000535:Aluminum; D003743:Dental Enamel / Q000000981:diagnostic imaging; D003764:Dental Materials; D003804:Dentin / Q000000981:diagnostic imaging; D006801:Humans; D011861:Radiography, Dental / Q000592:standards*; D012015:Reference Standards
chemical_list: D000497:Alloys; D003764:Dental Materials; D000535:Aluminum