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Microleakage in full-crown all-ceramic restorations: influence of internal surface treatment, silane application,
Angela Brys Osório1, Guilherme Briäo Camacho, Flávio F Demarco
1Operative Dentistry Department, School of Dentistry, Federal University of Pelotas, Rio Grande do Sul, Brazil. abosorio@uol.com.br
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.