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.