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Influence of Enzymatic and Chemical Degradation on Zirconia Resin Bond Strength After Different Surface Treatments Pubmed



Mirmohammadi H1, 2, 3 ; Aboushelib MN2, 4 ; Salameh Z5 ; Kleverlaan CJ2 ; Feilzer AJ2
Authors
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Authors Affiliations
  1. 1. ACTA, Department of Dental Materials Science, 1066 EA Amsterdam, Louwesweg 1, Netherlands
  2. 2. Department of Dental Materials Science, Academic Center for Dentistry Amsterdam, University of Amsterdam and Vrije University, Amsterdam, Netherlands
  3. 3. Department of Restorative Dentistry, School of Dentistry, Esfahan University of Medical Sciences, Esfahan, Iran
  4. 4. Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
  5. 5. Growth Factors and Bone Regeneration, King Saud University, Riyadh, Saudi Arabia

Source: American Journal of Dentistry Published:2010


Abstract

Purpose: To investigate the influence of chemical and enzymatic degradation on the stability of zirconia resin bond strength using micro-shear bond strength test. Methods: Zirconia discs were airborne particle abraded (SB) or selective infiltration etched (SIE) while no surface treatment served as control. Resin composite (Filtek Z250) microdiscs were bonded to zirconia using self-adhesive universal resin cement (RelyX UniCem). Micro-shear bond strength (μSBS) test was conducted after immersion in the following degrading media: 24 hours and 2 weeks of water storage, and 2 weeks in NaOH, alcohol, or esterase enzyme (n=10). Results: There was a significant influence of the surface finish (P< 0.001, F= 154.5), biodegradation medium (P< 0.001, F=52.9), and their interaction (P< 0.001, F=6.0) on zirconia resin bond strength. In general SIE group revealed the highest μSBS values (8.1 - 34.5 MPa) after degradation in different media, followed by SB group (8.7 - 28.5 MPa), while the control group showed significantly lower bond strength (0.4 - 9 MPa).
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