ABSTRACT
OBJECTIVES: The aim of this article is to propose a resin cement cleaning protocol for use before recementing a debonded restoration. STUDY DESIGN: Ceramic samples were fabricated from IPS d.sign® and IPS e.max Press® and were treated with hydrofluoric acid etching (HF), or HF+silane (S), or HF+S+adhesive or HF+S+A+resin cement. All samples were placed in a furnace at 650º for one minute in order to attempt to pyrolyze the composite. Each step was examined under scanning electron microscopy (SEM). RESULTS: When the cleaning protocol had been performed, it left a clean and retentive surface. CONCLUSIONS: If the restoration is placed in a furnace at 650º for one minute, the composite cement will burn or pyrolyze and disappear, allowing conventional retreatment of the ceramic before rebonding. Key words:Ceramic, debond, surface treatment.
ABSTRACT
With the appearance of all-ceramic systems, providing a choice of framework porcelains and allowing the samematerial to be used for the veneer, it is now possible to select the ideal structure in terms of both function andesthetics. Silicate ceramics allow porcelain laminate veneers and crowns to be used in the anterior region, providingexcellent esthetics; while for the posterior area, where function takes precedence, oxide ceramics, specificallyzirconium oxide, are preferred. The IPS e.max ceramic system, heir apparent to the IPS Empress 2 system,combines the advantages of zirconium oxide ceramics (IPS e.max Zircad) with the excellent esthetic qualities ofsilicate ceramics (IPS e.max Press).This paper presents a clinical case requiring complete maxillary rehabilitation for esthetic purposes. An overviewof some of the porcelains used in this system, analyzed from both the clinical and laboratory perspective is provided.The esthetic advantages of a single ceramic veneer, the need to select appropriate ceramics for anterior andposterior regions, and cementation and surface treatments are discussed (AU)
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Subject(s)
Humans , Middle Aged , Ceramics , Crowns , Denture, Partial , MaxillaABSTRACT
With the appearance of all-ceramic systems, providing a choice of framework porcelains and allowing the same material to be used for the veneer, it is now possible to select the ideal structure in terms of both function and aesthetics. Silicate ceramics allow porcelain laminate veneers and crowns to be used in the anterior region, providing excellent aesthetics; while for the posterior area, where function takes precedence, oxide ceramics, specifically zirconium oxide, are preferred. The IPS e.max ceramic system, heir-apparent to the IPS Empress 2 system, combines the advantages of zirconium oxide ceramics (IPS e.max Zircad) with the excellent aesthetic qualities of silicate ceramics (IPS e.max Press). This paper presents a clinical case requiring complete maxillary rehabilitation for aesthetic purposes. An overview of some of the porcelains used in this system, analyzed from both the clinical and laboratory perspective is provided. The aesthetic advantages of a single ceramic veneer, the need to select appropriate ceramics for anterior and posterior regions, and cementation and surface treatments are discussed.
