Selvan, - (2007) Comparison of tensile bond strength of two different resin cements used to bond base metal alloy to human enamel: An In Vitro study. Masters thesis, Ragas Dental College & Hospital, Chennai.
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Abstract
This In-vitro study has been done to evaluate and compare the tensile bond strength of two different resin cements used to bond base metal alloy to human enamel. The two test resin cement systems were Panavia F.2 and Rely X Unicem. A total of 40 natural teeth were taken in this study. The labial surfaces were ground at slow speed and were visually examined to ensure that enamel was continuous and the dentin was not exposed. Forty alloy discs of 5 mm diameter with 1mm thickness were randomly divided into four groups of ten samples each. Group 1 and Group 2 alloy discs were surface treated with 50μm and 250μm aluminum oxide respectively and then bonded to enamel of the corresponding natural tooth test specimen with Panavia F2.0, according to the manufacturer’s instructions. Group 3 and Group 4 alloy discs were surface treated with with 50μm and 250μm aluminum oxide respectively and then bonded to enamel of the corresponding natural tooth test specimen with Rely X Unicem according to the manufacturer’s instructions. The samples were thermocycled and they were loaded in Instron testing machine for tensile testing. The debonded alloy surfaces were examined under scanning electron microscope. The results were tabulated and subjected to statistical analysis. The results of this study showed the comparative mean tensile bond strengths of two resin cements were not statistically significant. The effect of surface treatment with 50 μm aluminum oxide of air abrasion of the base metal alloy surface yielded significantly higher values of tensile bond strength compared to that obtained with 250 μm aluminum oxide of air abrasion in this study. SEM examination of the metal interface revealed adhesive type of failure with 250μm aluminum oxide air abrasion whereas, cracks were found in the cement layer with 50 μm aluminum oxide air abrasion irrespective of the cement employed.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | tensile bond strength, two different resin cements, bond base metal alloy, human enamel, In Vitro study. |
| Subjects: | DENTAL > Prosthodontics and Crown and Bridge |
| Depositing User: | Kambaraman B |
| Date Deposited: | 19 Jan 2018 01:26 |
| Last Modified: | 19 Jan 2018 01:26 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/5496 |
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