Repair bond strength of a resin composite to alumina-reinforced feldspathic ceramic.

Tamiye Simone Goia, Fabíola Pessôa Leite, Luiz Felipe Valandro, Mutlu Ozcan, Marco Antonio Bottino

Journal: The International journal of prosthodontics 2006;19(4):400-2

PMID: 16900826

Abstract

This study compared the microtensile bond strength of a repair resin to an alumina-reinforced feldspathic ceramic (Vitadur-alpha, 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-microm 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.

Address: Department of Dental Materials and Prosthodontics, Federal University of Santa Maria, Brazil.

MeSH Terms: Acid Etching, Dental, Air Abrasion, Dental, Aluminum Oxide, Aluminum Silicates, Ceramics, Composite Resins, Dental Bonding, Dental Porcelain, Dental Prosthesis Repair, Humans, Hydrofluoric Acid, Materials Testing, Microscopy, Electron, Scanning, Potassium Compounds, Silanes, Silicon Dioxide, Stress, Mechanical, Surface Properties, Tensile Strength