title: Microleakage of crowns cemented with glass ionomer cement: effects of preparation finish and conditioning with polyacrylic acid.
abstract: This study compared the marginal leakage of cast gold complete crowns cemented with glass ionomer and with zinc phosphate cement. The effect of polishing the preparations and conditioning with polyacrylic acid was also evaluated for glass ionomer cement. The cast gold crowns cemented with glass ionomer cement demonstrated significantly lower marginal leakage than did those with zinc phosphate cement. The extent of microleakage was not substantially different between crowns when the preparations were polished and conditioned with polyacrylic acid.
authors.affiliation: Department of Restorative Dentistry, Loma Linda University, School of Dentistry, Calif.
authors.forename: A H
authors.initials: AH
authors.lastname: Tjan
authors.forename: K D
authors.initials: KD
authors.lastname: Peach
authors.forename: S L
authors.initials: SL
authors.lastname: VanDenburgh
authors.forename: E R
authors.initials: ER
authors.lastname: Zbaraschuk
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D002484:Cementation; D004396:Coloring Agents; D003442:Crowns; D003763:Dental Leakage / Q000175:diagnosis / Q000209:etiology*; D003775:Dental Polishing / Q000379:methods; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D013499:Surface Properties; D014070:Tooth / Q000033:anatomy & histology; D015036:Zinc Phosphate Cement / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D005899:Glass Ionomer Cements; D006047:Gold Alloys; C006903:carbopol 940; D015036:Zinc Phosphate Cement