title: A comparison of the marginal and internal adaptation of titanium and gold-platinum-palladium metal ceramic crowns.
abstract: The marginal and internal adaptation of metal ceramic crowns fabricated by electrical discharge machining and conventional metal ceramic alloys were compared. The crowns were cemented using zinc phosphate cement, embedded in epoxy resin, and sectioned in two planes: diagonal and buccolingual. The crowns were then measured at nine sites. The results showed that there were no statistical differences between the external marginal opening of the titanium and the gold-platinum-palladium crowns. The overall marginal discrepancies for the restorations in this study were 61 microns (+/- 34 microns) for the titanium metal ceramic crowns and 47 microns (+/- 17 microns) for the gold-platinum-palladium metal ceramic crowns.
authors.affiliation: School of Dentistry, Loma Linda University, California 92350, USA.
authors.forename: S
authors.initials: S
authors.lastname: Valderrama
authors.forename: N
authors.initials: N
authors.lastname: Van Roekel
authors.forename: M
authors.initials: M
authors.lastname: Andersson
authors.forename: C J
authors.initials: CJ
authors.lastname: Goodacre
authors.forename: C A
authors.initials: CA
authors.lastname: Munoz
mesh_terms: D000704:Analysis of Variance; D003442:Crowns; D000044:Dental Abutments; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain; D006047:Gold Alloys; D006801:Humans; D016876:Metal Ceramic Alloys; D008961:Models, Structural; D010165:Palladium; D010984:Platinum; D014025:Titanium
chemical_list: D006047:Gold Alloys; D016876:Metal Ceramic Alloys; C077451:Procera; D003776:Dental Porcelain; D010984:Platinum; D010165:Palladium; D014025:Titanium