Investigation of the Effect of Different Types of IPS e.max Press Porcelain on the Level of Polymerization of Light Cured Choice 2 Cement with FTIR Method

Due to the importance of polymerization of resin cements on the longevity of indirect restorations, this study aimed to evaluate the effect of various thicknesses of IPS e.max Press porcelain on the amount of polymerization of light cured choice 2 resin cement by FTIR method.  In this experimental study, 40 porcelain disks (IPS e.max Press, (Ivacolar Vivadent, Liechtenstein) with a diameter of 10 and thicknesses of, 0.5, 1, And 1.5 mm (n = 10) were prepared using wax removal method. Resin cement Choice 2 (Bisco Inc, USA) with A2 color once before curing and wants after curing with LED (LEDemetronll, Ker, USA) mv / cm2 1200 the samples were placed in an FTIR machine and the polymerization percentage was recorded. Data were analyzed using ANOVA. The light cured Choice 2 resin cement polymerization in four groups showed that the highest polymerization was related to 1.5 mm thickness (72.5% ± 0.41% ) and the least of them was for 0.5 mm thickness ( 68.7% ± 0.88%) ANOVA test showed that this difference between groups were not statistically significant (p <0.2). Selective thicknesses of porcelain IPS e.max Press in this study did not have affect on polymerization of choice2 cement.