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Aim: This in-viro study aimed to evaluate and compare the shear bond strength of resin cement with high translucency zirconia with silane coupling agents and bonding agent separately (Group3), bonding agent containing silane (Group 2) and bonding agent which does not have silane (Group 1). Materials and Methods: The study was conducted by using the high translucency zirconia blanks along with the CAD-CAM equipments. After sintering the specimens according to manufacturer’s instructions surface modifications, bonding procedures and evaluation of bond strength was performed. Bond strength of the samples was tested using universal testing machine. The results were analyzed statistically using descriptive analysis. Results: The mean shear bond strength obtained for group 1, group 2 and group 3 was 17.97, 22.01, 28.87MPA respectively. The SBS of group 3 was significantly higher than the other two groups as the surface of zirconia was treated with both Silane and Silane-containing universal adhesive. Conclusion: The null hypothesis was rejected. Within the limitations of the study, it was concluded that the shear bond strength between resin cement and high translucency zirconia was highest when treated with bonding agent (universal adhesive) and silane coupling agent separately after air particle abrasion.

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Dental uorosis is the hypomineralization of the enamel due to overexposure to excessive uoride concentration during the time of tooth development. Severe discoloration and tooth wear are the main adverse effects of this condition. This case report describes 28 year old patient with generalized attrition of full complement of teeth with brownish discoloration , pitting and reduction in the vertical dimension due to severe dental Fluorosis. Complete rehabilitation of entire dentition was the proposed treatment and occlusal splint was used to increase the vertical dimension. Once the new vertical dimension was established provisional xed restoration followed by permanent rehabilitation.The following case report proposes that a promising clinical outcome was obtained by re-establishment of the vertical dimension with improvisation in esthetics and function.

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