In vitro marginal adaptation of alumina porcelain ceramic crowns.
This study evaluated the dimensional stability during firing of In-Ceram alumina porcelain ceramic and examined the marginal fit for three different configurations of tooth preparation. A stereomicroscope was used to measure the space between the margin of restorations and tooth preparations. The three methods of tooth preparation were statistically compared and revealed suitable dimensional stability during the firing and glazing process. A better marginal fit was recorded for artificial crowns fabricated on a chamfer or 50-degree shoulder tooth preparation.
Department of Prosthetic Dentistry, School of Dentistry, University of Turin, Italy.
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Pera
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Gilodi
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Bassi
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Carossa
D000537:Aluminum Oxide / Q000737:chemistry*; D000704:Analysis of Variance; D002484:Cementation; D002516:Ceramics / Q000737:chemistry*; D003442:Crowns; D000044:Dental Abutments; D003735:Dental Casting Technique; D003737:Dental Cavity Preparation / Q000379:methods / Q000706:statistics & numerical data; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry*; D004853:Epoxy Resins; D005899:Glass Ionomer Cements / Q000737:chemistry; D006358:Hot Temperature; D008422:Materials Testing; D013499:Surface Properties
D004853:Epoxy Resins; D005899:Glass Ionomer Cements; D003776:Dental Porcelain; C070870:In-Ceram; C058236:Vitadur N; D000537:Aluminum Oxide