title: Marginal fidelity and microleakage of porcelain veneers made by two techniques.
abstract: This study evaluated the marginal fidelity and microleakage of porcelain veneers made with the platinum foil and refractory die techniques. Maxillary incisors, matched for size and amount of enamel, were prepared with 0.5 mm uniform intraenamel reduction. The indirectly made veneers were etched, treated with silane, and luted with a composite resin, and the margins were finished and polished. The restored teeth were stored in 37 degrees C water, thermocycled 1000 times, stained with silver nitrate, embedded, sectioned buccolingually and mesiodistally, and measured at x250 magnification. The platinum foil veneers had significantly better vertical marginal fidelity but significantly more overcontouring than had the refractory die veneers. Universal microleakage at the tooth-composite resin interface and negligible microleakage at the porcelain-composite resin interface were observed. No relationship was found between the amount of vertical marginal opening and the amount of microleakage.
authors.affiliation: University of California, School of Dentistry, Los Angeles.
authors.forename: J A
authors.initials: JA
authors.lastname: Sorensen
authors.forename: J M
authors.initials: JM
authors.lastname: Strutz
authors.forename: S P
authors.initials: SP
authors.lastname: Avera
authors.forename: D
authors.initials: D
authors.lastname: Materdomini
mesh_terms: D000134:Acid Etching, Dental; D000537:Aluminum Oxide / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003722:Dental Alloys; D001840:Dental Bonding; D003735:Dental Casting Technique; D003743:Dental Enamel / Q000473:pathology; D003763:Dental Leakage / Q000473:pathology; D003776:Dental Porcelain / Q000737:chemistry*; D003801:Dental Veneers; D003779:Denture Design; D006801:Humans; D008422:Materials Testing; D015588:Observer Variation; D010984:Platinum; D015203:Reproducibility of Results; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; C062269:Hi Ceram; D003776:Dental Porcelain; D010984:Platinum; C058236:Vitadur N; C058233:Ceramco; D000537:Aluminum Oxide