The effect of thickness and translucency of polymer-infiltrated ceramic-network material on degree of conversion of resin cements

摘要

The aim of the present study was to determine the degree of conversion of light- and dual-cured resincements used in the cementation of all-ceramic restorations under different thicknesses of translucent (T) andhigh-translucent (HT) polymer-infiltrated ceramic-network (PICN) material. MATERIALS AND METHODS. T andHT PICN blocks were prepared at 0.5, 1.0, 1.5, and 2.0 mm thicknesses (n=80). Resin cement samples wereprepared with a diameter of 6 mm and a thickness of 100 μm. Light-cured resin cement was polymerized for 30seconds, and dual-cure resin cement was polymerized for 20 seconds (n=180). Fourier transform infraredspectroscopy (FTIR) was used for degree of conversion measurements. The obtained data were analyzed withANOVA and Tukey HSD, and independent t-test. RESULTS. As a result of FTIR analysis, the degree of conversionof the light-cured resin cement prepared under 1.5- and 2.0-mm-thick T and HT ceramics was found to be lowerthan that of the control group. Regarding the degree of conversion of the dual-cured resin cement group, therewas no significant difference from the control group. CONCLUSION. Within the limitation of present study, itcan be concluded that using of dual cure resin cement can be suggested for cementation of PICN material,especially for thicknesses of 1.5 mm and above.