Comparative Measurement on Transmittance of Four Systems of Dental All-Ceramic Zirconia Materials

This study aims to investigate the difference on transmittance of four systems of dental all-ceramic zirconia materials which are at clinical required thickness, IPS e.max Press used as control. All-ceramic zirconia specimens containing Zenostar, Lava, Cercon and Upcera, are fabricated into discs with 10mm, in diameter and 0.5 +/- 0.01 mm in thickness. The transmittance of disc specimens is measured by using PR2650 spectrophotometer and the measurements are conducted statistical analysis with software SPSS13.Experimental results reveal that the transmittances of four systems of zirconia materials are significantly different. Their transmittances decrease in sequence of IPS e.max Press, Zenostar, Lava, Cercon and Upcera zirconia. Zenostar and Lava Zirconia, which have good optical effects, possess ideal restorative materials for anterior teeth with higher transmittance.