Effect of Post-Contamination Surface Treatment on the Bond Strength of Adhesively Bonded Ceramic Indirect Restorations
Abstract
Purpose: The purpose of this research was to determine the effects of contamination, different cleaning methods, specifically Ivoclean, and simulated aging on the shear bond strength (SBS) of resin cement to 2 different ceramic materials, zirconia and lithium disilicate. Materials and Methods: Blocks of lithium disilicate and zirconia were prepared for bonding by hydrofluoric acid and particle abrasion respectively. The samples were divided into 3 groups for each type of ceramic:, Ivoclean pilot study, 24 hour storage group, and the thermocycled group. The Ivoclean pilot study consisted of 10 uncontaminated samples and 10 uncontaminated Ivoclean treated samples for both ceramics. The 24 hour stored and thermocycled groups were broken down to 5 subgroups: saliva uncontaminated, contaminated, Ivoclean, phosphoric acid (lithium disilicate) or air abrasion (zirconia), and air/water spray, with each subgroup containing 10 samples. The samples were tested on an universal testing machine to determine the SBS. Results: The SBS of uncontaminated samples treated with Ivoclean was not statistically different from the uncontaminated control samples. The 24 hour stored samples were not significantly different from each other, except for the contaminated samples, which weresignificantly lower than uncontaminated. The thermocycled groups showed somewhat more difference. A significant number of samples debonded. Interestingly, all of the Ivoclean treated zirconia samples debonded and SBS could not be recorded. Lithium disilicate uncontaminated controls and the phosphoric acid cleaned samples were statistically similar. The thermocycled uncontaminated control and air abraded samples proved to be statistically similar. Conclusions: Saliva contamination and simulated aging (thermocycling) decreased bond strengths independently from each other and compounded one another. Cleaning methods generally did not return bond strengths to that of the uncontaminated samples.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 25, 2017
- Accession Number
- AD1064099
Entities
People
- Drew T. Krena
Organizations
- Uniformed Services University of the Health Sciences