Survey Effect of cementation with zinc phosphate or panaviaF2cements on final shade of Zirkonzahn all ceramic crowns with different core thicknesses

Today as the technology of dental product fabrication progress the demand for maximum esthetic of restoration increase، is sided of knowledge and usage of new ceramic in dental lab selection of proper type and color of cement and their effect on definition color of restoration is mandatory and error in this regard increase treatment cost. Thus the aims of this study were to evaluate the influence of resin cement and different thickness in zirkonzahn ceramic on the final color of the zirkonzahn ceramic crown by spectrophotometer.

In this invitro study ZirconzahnA2 disks were prepared with dimension 5mm diameter and      1.2 mm thickness Panavia F2 and zincphosphate cements was use as luting agent on the composite (Denfil A2) substructure. Ceramic zirkonzahn (0.3، 0.5، 0.7) mm was apply on the zirkonzahn core and the color changes in comparison to control group evaluate by easy shade II spectrophotometer. Data were analyzed with SPSS17, T-tests, and ANOVA statistical tests.

Shade of the cement had significant effected on the color of zirconzahn ceramic (P value=0.001).Various thickness of zirkonzahn ceramic have different color changes result on restorations (P-value=0.068).  

Cement used in a ceramic restoration (zirkonzahn) can affect the final color it in such a way that, in the absence of proper cement selection and inadequate thickness of the core, it is unacceptable in terms of color match and aesthetic restorations turn.