title: The effect of restorative materials on the wear of human enamel.
abstract: The wear of human dental enamel against amalgam, Concise composite, SR-Isosit Inlay/Onlay composite, Vitadur-N glazed porcelain, unglazed IPS Empress ceramic, and enamel (control) was investigated by use of a modified stress cycling machine. Testing was carried out in water and in citric acid (pH 4) and the enamel-material couples were subjected to 25,000 cycles of wear with a maximum load of 40 N. Tooth profile reduction was measured at baseline and at 5000 cyclic intervals with a computer image analysis program. The depth of the wear scars on material specimens was analyzed with a profilometer. All materials produced increased enamel wear in acid. Vitadur-N glazed porcelain was found to be the most destructive to human dental enamel, and this was closely followed by Empress and enamel.
authors.affiliation: Department of Conservative Dental Surgery, UMDS Guy's Dental School, London, England.
authors.forename: D K
authors.initials: DK
authors.lastname: Ratledge
authors.forename: B G
authors.initials: BG
authors.lastname: Smith
authors.forename: R F
authors.initials: RF
authors.lastname: Wilson
mesh_terms: D000180:Acrylic Resins / Q000009:adverse effects; D000537:Aluminum Oxide / Q000009:adverse effects; D000538:Aluminum Silicates; D017438:Bisphenol A-Glycidyl Methacrylate / Q000009:adverse effects; D002951:Citrates / Q000737:chemistry; D019343:Citric Acid; D003188:Composite Resins / Q000009:adverse effects*; D003723:Dental Amalgam / Q000009:adverse effects*; D003743:Dental Enamel / Q000503:physiopathology*; D003776:Dental Porcelain / Q000009:adverse effects*; D003793:Dental Restoration, Permanent / Q000009:adverse effects; D003799:Dental Stress Analysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D011140:Polyurethanes / Q000009:adverse effects; D013499:Surface Properties; D014072:Tooth Abrasion / Q000209:etiology*
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; D002951:Citrates; C029012:Composite Dental Resin; D003188:Composite Resins; C075815:IPS-Empress ceramic; D011140:Polyurethanes; D003776:Dental Porcelain; D019343:Citric Acid; D017438:Bisphenol A-Glycidyl Methacrylate; C513704:Isosit; C058236:Vitadur N; D003723:Dental Amalgam; D000537:Aluminum Oxide