Effect Of Abutment color & Commercial type of Translucent Zirconia on the color Matching of monolithic Ceramic Crowns

Abstract

Abstract:

Aim of study: This research aims to study the effect of the color difference of the laboratory dental abutment on the final color of full-ceramic crowns made of 3 br& types of transclucent  zirconia prettau Anterior (Zircon Zahn), DDcubX2 (dental dirkt). Whitepeaks (Copra smil).

Materials & Methods: The sample of the in-vitro study consisted of 30 transclucent zirconia ceramic disk of 1 mm thickness, 10 mm diameter & A1 color divided into three equal main groups according to the br& (10 tablets in each group) where 3 br& names were selected, then the disks were placed on nine copies. Colored resin cylinder made of natural die material in four colors according to the ND color system (ND1, ND3, ND6), in addition to a metal cylinder so that these cylinders represent the clinical substrate. The color is in the center of each disc after placing it on each of the ten cylinders 3 times in a row then, arithmetic mean of the readings was taken, & therefore after taking the arithmetic averages of the readings, the laboratory sample consisted of 160 color readings.

Results: The study showed a clear effect of the color of the stent & the producing company on the discoloration of zirconia crowns after placing them on many colored substrats.

The br& had an effect on the color change of zirconia. The three types could not reach the desired color over all the colored stents, while all of them were able to give an acceptable clinical color over the light stents, despite the presence of statistically significant differences in the color change between the prettau anterior & both the DDcubx2 & whitepeaks where The chromatic change in both DDcubx2 & whitepeaks was significantly more important than the anterior prettau but did not affect clinical acceptance. Also, the prettau anterior type gave a clinically acceptable color above the ND3 stent, while the remaining two types were not able to do so.

Conclusions: Within the limits of this study, the color change of the abutment & the manufacturer of the clear zirconia leads to significant changes in the color of the final crowns with a thickness of 1 mm. Also, it is not possible to place the clear zirconia crowns with a thickness of 1 mm over the abutments of moderately or severely stained & heavy metals.

Keywords: Transparent Zirconia, Trademark, Color, Electronic Colorimeter