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The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

January/February 2007
Volume 20 , Issue 1

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Microtensile Bond Strength of a Resin Cement to Silica-Coated and Silanized In-Ceram Zirconia Before and After Aging

Luiz Felipe Valandro, MSc, PhD / Mutlu zcan, DMD, PhD / Regina Amaral / Fabiola Pessoa Pereira Leite, PhD / Marco Antonio Bottino, PhD

Pages: 7072
PMID: 17319367

Purpose: This study compared the microtensile bond strength of resin-based cement (Panavia F) to silica-coated, silanized, glass-infiltrated high-alumina zirconia (In-Ceram Zirconia) ceramic in dry conditions and after various aging regimens. Materials and Methods: The specimens were placed in 1 of 4 groups: group 1: dry conditions (immediate testing without aging); group 2: water storage at 37C for 150 days; group 3: 150 days of water storage followed by thermocycling (3 12,000, 5C to 55C); group 4: water storage for 300 days; group 5: water storage for 300 days followed by thermocycling. Results: Group 1 showed a significantly higher microtensile bond strength value (26.2 1 MPa) than the other aging regimens (6.5 1, 6.2 2, 4.5 1, 4.3 1 MPa for groups 2, 3, 4, and 5, respectively) (P < .01). Conclusion: Satisfactory results were seen in dry conditions, but water storage and thermocycling resulted in significantly weaker bonds between the resin cement and the zirconia. Int J Prosthodont 2007;20:7072

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