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Volume 19 , Issue 4
July/August 2006

Pages 400402

Repair Bond Strength of a Resin Composite to Alumina-Reinforced Feldspathic Ceramic

Tamiye Simone Goia, DDS / Fabola Pessa Pereira Leite, PhD / Luiz Felipe Valandro, PhD / Mutlu zcan, DMD, PhD / Marco Antonio Bottino, PhD

PMID: 16900826

This study compared the microtensile bond strength of a repair resin to an alumina-reinforced feldspathic ceramic (Vitadur-a, Vita) after 3 surface conditioning methods: Group 1, etching with 9.6% hydrofluoric acid for 1 minute plus rinsing and drying, followed by application of silane for 5 minutes; group 2, airborne particle abrasion with 110-mm aluminum oxide using a chairside air-abrasion device followed by silane application for 5 minutes; group 3, chairside tribochemical silica coating with 30-m SiOx followed by silane application for 5 minutes (N = 30). Group 1 presented the highest mean bond strength (19.7 3.8 MPa), which was significantly higher than those of groups 2 (10 2.6 MPa) and 3 (10.4 4 MPa) (P < .01). Scanning electron microscope analysis of the failure modes demonstrated predominantly mixed types of failures, with adhesive and/or cohesive failures in all experimental groups. Int J Prosthodont 2006;19:400402.

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