title: Microleakage in full-crown all-ceramic restorations: influence of internal surface treatment, silane application, alumina system, and substrate.
abstract: This study investigated the influence of internal surface treatment and margin location on the microleakage of 2 alumina-reinforced ceramic crown systems: In-Ceram (VITA Zahnfabrik) and Procera (Nobel Biocare). Full crowns were produced for each of the 2 systems (n = 24) in human premolars, with margins located in enamel and dentin, and luted with Single Bond and RelyX ARC (3M ESPE). Four internal ceramic treatments were tested: (1) aluminum oxide blasting (AO), (2) AO plus silane, (3) hydrofluoric acid etching (HF), and (4) HF plus silane. After thermal cycling, leakage was measured quantitatively. Statistical analysis (P < .05) showed higher leakage in dentin margins compared to enamel. In enamel, Procera showed greater leakage compared to In-Ceram. Generally, lower microleakage was observed for the AO plus silane treatment.
authors: Operative Dentistry Department, School of Dentistry, Federal University of Pelotas, Rio Grande do Sul, Brazil. abosorio@uol.com.br
authors: Angela Brys
authors: AB
authors: Osório
authors: Guilherme Briäo
authors: GB
authors: Camacho
authors: Flávio F
authors: FF
authors: Demarco
authors: John M
authors: JM
authors: Powers
mesh_terms: D000134:Acid Etching, Dental; D020906:Air Abrasion, Dental; D000537:Aluminum Oxide / Q000737:chemistry*; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003442:Crowns; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification*; D003776:Dental Porcelain / Q000737:chemistry*; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D006858:Hydrofluoric Acid / Q000737:chemistry; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D019231:Tooth Preparation, Prosthodontic / Q000379:methods
chemical_list: D017220:Dentin-Bonding Agents; D016876:Metal Ceramic Alloys; D011109:Polymethacrylic Acids; C077451:Procera; C462240:RelyX ARC; D019279:Resin Cements; D012821:Silanes; C115612:single bond; D003776:Dental Porcelain; C070870:In-Ceram; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D014025:Titanium; D000537:Aluminum Oxide; D006858:Hydrofluoric Acid