@article{article_111814, title={POLYMERIZATION EFFICIENCY OF TWO DUAL-CURE CEMENTS THROUGH DENTAL CERAMICS}, journal={Journal of Istanbul University Faculty of Dentistry}, volume={49}, pages={10–18}, year={2015}, DOI={10.17096/jiufd.25575}, author={Turp, Volkan and Öngül, Değer and Gültekin, Pınar and Bultan, Özgür and Karataşlı, Burçin and Pak Tunç, Elif}, keywords={Ceramic thickness; polymerization; resin cement; zirconia}, abstract={<p class="06ZETBody01GRBLM" align="left"> <strong> <span class="Bold"> <span lang="EN-US">Purpose: </span> </span> </strong> <span class="Bold"> <span lang="EN-US"> The aim of this study was to evaluate the effect of thickness of zirconia on curing efficiency of resin cements. </span> </span> </p> <p class="06ZETBody01GRBLM" align="left"> <span class="Bold"> <span lang="EN-US"> <strong>Materials and Methods </strong>: </span> </span> <span class="Bold"> <span lang="EN-US"> 4 discs with 4.0 mm in diameter were prepared from non-HIP translucent zirconia blocks using a CAD/CAM system and feldspathic ceramic was layered onto discs. Thus, 4 ceramic disc samples were fabricated: (G) 0.5 mm zirconia- as a control group, (G1) 0.5 mm zirconia and 0.5 mm feldspathic, (G2) 1.0 mm zirconia and 0.5 mm feldspathic and (G3) 2.0 mm zirconia and 0.5 mm feldspathic ceramic layer. 2 different dual cure cements were polymerized using a LED curing unit. Degree of conversion was evaluated using Vickers Hardness Test and depths of cure of samples were measured. Data were analyzed statistically using One-way ANOVA and Tukey’s HSD test (p<0.05). </span> </span> </p> <p class="06ZETBody01GRBLM" align="left"> <strong> <span class="Bold"> <span lang="EN-US">Results: </span> </span> </strong> <span class="Bold"> <span lang="EN-US"> Microhardness and depth of cure values were different under same thickness of ceramic discs for two resin cements. As the thickness of the zirconia discs increased, the microhardness values and depth of cure decreased. </span> </span> </p> <p class="06ZETBody01GRBLM" align="left"> <strong> <span class="Bold"> <span lang="EN-US">Conclusion: </span> </span> </strong> <span class="Bold"> <span lang="EN-US"> Photocuring time cannot be the same for all clinical conditions, under thicker zirconia restorations (>2.0 mm), an extended period of light curing or a light unit with a high irradiance should be used. </span> </span> </p>}, number={1}, publisher={Istanbul University}