Comparison of surface roughness between CO2 laser and typical glazing on two types of porcelain vita and ivoclar

Abstract

Existence defects in porcelain is directly related to the techniques of porcelain and fi ring cycles. Adjust glazed surface during clinical work to correct occlusal interferences surface and proximal are common, Which Leads to increased surface roughness. So do Glaze and polishing after Adjust process is essential. In this in vitro study evaluated two types of commercial porcelain with different crystalline content, VITA (Zahnfabrik, Bad Säckingen, Germany) and porcelain IPS d.Sign (Ivoclar Vivadent, Amherst, NY) each of the samples of porcelain were divided into 4 groups according to the two types of porcelain used, generally divided into 8 groups were divided. The laser co2 laser (ultra-dream pluse, Guro-Gu, Seoul, Korea) wavelength 10.6 (mμ) and with the 30W and the time of exposure 1 and 1/5 minutes was used. Standard polished group with sandy paper with a grit similar, According to the America Academy aesthetic dentistry was prepare. Surface roughness were evaluated using a profi lometer and the two-way ANOVA test and post hoc Tukey test was used for statistical analysis of the samples. The fi ndings of this study indicated that porcelain surface roughness by CO 2 laser glazed signifi cantly less than typical Glaze, however, ANOVA test between average 5 groups length consecutive depth, did not show signifi cant differences, Also, the surface roughness of CO 2 laser glazed porcelain were signifi cantly lower than the polished porcelain. The surface roughness of glazed porcelain by laser CO 2 was less than of typical glaze.

Polymer-Cement Composites Glazing by Concentrated Solar Energy

“…Laser furnace processing also allows the surface to melt and resolidify, while avoiding the formation of cracks, the melting depth increasing rapidly as a function of the incubation energy. Comparing the laser glazing of two types of commercial porcelain with different crystalline content in [44] demonstrated the advantage of concentrated energy surface thermal treatment on surface roughness reduction.…”