IADR Abstract Archives
The effect of different types of cements on the final color of monolithic zirconia
Objectives: This study was conducted to evaluate the colour changes, in terms of perceptibility and acceptability, in monolithic zirconia and cement combination resulting from the use of two different thicknesses of the monolithic zirconia and three different types of cement. The translucency parameters of these combinations were also compared.
Methods: A total of 60 monolithic zirconia ceramics at two different thicknesses (0.6mm and 1mm) were milled. Three different types of cement ( conventional glass ionomer cement, resin-modified resin cement and adhesive resin cement) were selected for cementation. (n=10) Translucency and color changes of monolithic zirconia specimens after cement application were examined with spectrophotometer (Konica Minolta Sensing, Japan) and translucency parameter (TP) and color change (ΔE) were calculated. Statistical analysis was performed using One-way ANOVA, TUKEY multiple comparison test, and independent samples t test.
Results: All luting cements studied, regardless of the type, caused color difference both at 0,6 and 1 mm thicknesses of monolithic zirconia. The lowest ΔE values ( 3,53 ; 2,23 for 0,6 and 1mm respectively) were found for zirconia- resin modified glass ionomer combination whereas the highest ΔE values ( 5,64 ; 5,06 for 0,6 and 1mm respectively) were observed for zirconia-resin cement combination at both thicknesses. Glass ionomer cement affected the TP values the most for both thicknesses.
Conclusions: Cement type and material thicknesses affect final color and translucency of monolithic zirconia restorations.
Methods: A total of 60 monolithic zirconia ceramics at two different thicknesses (0.6mm and 1mm) were milled. Three different types of cement ( conventional glass ionomer cement, resin-modified resin cement and adhesive resin cement) were selected for cementation. (n=10) Translucency and color changes of monolithic zirconia specimens after cement application were examined with spectrophotometer (Konica Minolta Sensing, Japan) and translucency parameter (TP) and color change (ΔE) were calculated. Statistical analysis was performed using One-way ANOVA, TUKEY multiple comparison test, and independent samples t test.
Results: All luting cements studied, regardless of the type, caused color difference both at 0,6 and 1 mm thicknesses of monolithic zirconia. The lowest ΔE values ( 3,53 ; 2,23 for 0,6 and 1mm respectively) were found for zirconia- resin modified glass ionomer combination whereas the highest ΔE values ( 5,64 ; 5,06 for 0,6 and 1mm respectively) were observed for zirconia-resin cement combination at both thicknesses. Glass ionomer cement affected the TP values the most for both thicknesses.
Conclusions: Cement type and material thicknesses affect final color and translucency of monolithic zirconia restorations.