Date of Award

1-1-2012

Thesis Type

masters

Document Type

Thesis

Divisions

dentist2

Department

Dept of Conservative Dentistry

Institution

University of Malaya

Abstract

Objective: The objective of this study was to evaluate the tensile bond strength of Vita In-Ceram® Zirconia coping Materials when luted to two different composite resin core materials with four different luting materials. Methods: One hundred and twenty ceramic specimens (8X5mm) were fabricated from a Vita In-Ceram® Zirconia kit which was prepared in a ceramic dental laboratory according the manufacturer’s instructions. One hundred and twenty composite resin specimens were prepared from Spectrum®TPH®3 (hybrid composite) (Dentsply, Germany) (n=60) and Composan Core DC (flowable composite) (Promedica, Germany) (n=60). The ceramic discs were divided into eight groups (n=15 for each): group 1: (Control) ceramic cemented to Spectrum®TPH®3 with Elite (GC Corp, Japan); group 2: ceramic cemented to Spectrum®TPH®3 with Fuji I (GC Corp, Japan); group 3: ceramic cemented to spectrum®TPH®3 with Calibra® (Dentsply, Germany); group 4: ceramic cemented to Spectrum®TPH®3 with PanaviaF 2.0 (Kuraray Med Inc., Japan); group 5: (Control) Ceramic cemented to Composan Core DC with Elite; group 6: Ceramic cemented to Composan Core DC with Fuji I; group 7: Ceramic cemented to Composan Core DC with Calibra®; group 8: Ceramic cemented to Composan Core DC with PanaviaF 2.0. The specimens were stored for 24 hours in distilled water at 37 C prior to tensile bond strength testing. The data for each group were analyzed by the Kruskal-Wallis test followed by multiple pair-wise comparisons by using Mann-Whitney rank sum test for independent samples, (p < 0.05). Significance levels were adjusted with the Bonferroni correction for multiple testing. The fracture interfaces on each specimens were examined under a stereomicroscope to classify the mode of failure. Results: No significant differences in tensile bond strength were found between composite resin core materials (p > 0.05). There was a significant difference between different luting materials (p < 0.05). The mode of failure for most specimens were cohesive failure. Conclusion: The Vita In-Ceram® Zirconia ceramic coping when cemented to a composite resin core with Calibra® recorded a high mean value of tensile strength. The different composite core materials used in this study had no significant effect on tensile bond strength.

Note

Submission of research dissertation for the fulfillment of the degree of Master of Dental Science

Additional Files
3767-2._Chapter_1_–_6.pdf (1588 kB)
3767-3._References.pdf (179 kB)
3767-4._Appendices.pdf (112 kB)
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