Yasmin Shebl Hussein, Samir Mahmoud Ali Zidan And Jylan Fouad El Guindy ,

ABSTRACT
Objective: To Evaluate The Surface Hardness Of Cemented CERASMART Laminate Veneers After Exposure To Acidic Beverages (coffee, Carbonated Orange Juice And Artificial Saliva) For 24 Days Resembling 2 Years Of Clinical Service.

Materials and Methods: A Total Of 36 Cemented CERASMART Laminate Veneer On Extracted Central Incisors Were Fabricated By CEREC MC XL Milling Machine. All Samples (N=36) Were Divided Into To Three Test Groups As Follows: Group (A): Stored In Artificial Saliva Group B: Stored In Coffee And Group C: Stored In Carbonated Orange Juice. Surface Hardness Was Measured After Exposure To Aging Solutions, Where The Surface Hardness Was Measured Through Vicker?s Indentation, Three Indentations Were Made In Each Sample And The Mean Was Calculated For Each. Data Were Analysed Using One-way Analysis Of Variance (ANOVA) Significance Difference Test. Differences Were Considered Significant At P<0.05.

Results: It Was Found That The Highest Mean ? SD Value Of Surface Hardness Recorded With Saliva Storage (204.607?6.905 HV) Then Coffee Storage Mean Value (202.796?6.014 HV) While The Lowest Mean ? SD Value Of Surface Hardness Recorded With Orange Storage (201.867?7.438HV). The Difference Was Statistically Non-significant As Indicated By One-way ANOVA (F=0.416, P=0.6687>0.05).

Conclusions: Surface Hardness Of CERASMART Veneers Was Not Affected By Coffee And Carbonated Orange Juice Immersion.