Abstract

The present study tensile bond strength of complete veneer cast metal crowns using various luting agents Materials & methods: 30 freshly extracted tooth specimens were obtained and were divided randomly into two study groups with 15 specimens in each group; Zinc phosphate and Zinc polycarboxylate cements. The mounted teeth were prepared following the principles of tooth preparation. Cast was poured with Type IV dental stone. Fabrication of wax pattern was done. Devesting of casting (Nickel-chromium alloy) was done followed by finishing and polishing. Luting of the specimens was done according to specific study groups and following manufacturer's instructions. After cementation, samples were soaked in distilled water for 48 h at 36°C. In Universal Testing Machine, the tensile load at which the crown detached from the prepared tooth was measured. Results: Mean tensile strength observed in Zinc phosphate cement group was 1.568 N while mean tensile strength observed in Zinc polycarboxylate cement group was 0.925. while comparing the mean tensile strength among the two study groups statistically, non-significant results were obtained. Conclusion: Zinc phosphate cement exhibited higher tensile bond strength in comparison to zinc polycarboxylate cement.

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