IADR Abstract Archives
Effect of Sintering and Cement Color on Translucency of Zirconia
Objectives: The aim of this study is to evaluate the effect of different sintering procedures and the color of the adhesive resin cement on the translucency parameter (TP) of monolithic zirconium dioxide ceramics.
Methods: 36 specimens in dimensions of 10×10×1 mm were prepared from monolithic zirconium dioxide ceramic blocks. The specimens were divided into 3 groups according to the sintering procedure applied (n=12); Group I: Conventional sintering, Group II: Rapid sintering, Group III: Superfast sintering. 12 pieces of yellow and 12 pieces of transparent adhesive resin cement specimens were prepared in 0.2 mm thickness. Color measurements of the specimens were made on black and white backgrounds by a spectrophotometer. First color measurements were made on monolithic zirconium dioxide ceramic specimens. Then color mesuments were performed by matching ceramic specimens in each sintering group with yellow or transparent resin cement. Optical coupling of the resin cement and ceramic specimens was achieved by applying a refractive index solution. The Delta TP value of each specimen was calculated from the obtained data. Then statistical analyzes were performed.
Results: The lowest and the highest TP values were obtained from rapid sintering/ transparent resin cement group and rapid sintering/yellow resin cement group, respectively. There was no significant difference between the groups (p>0.05).
Conclusions: According to results of this study, combinations of the the sintering procedures applied and the color of the resin cement used did not effect the translucency parameter of monolithic zirconium dioxide ceramic restorations.
Methods: 36 specimens in dimensions of 10×10×1 mm were prepared from monolithic zirconium dioxide ceramic blocks. The specimens were divided into 3 groups according to the sintering procedure applied (n=12); Group I: Conventional sintering, Group II: Rapid sintering, Group III: Superfast sintering. 12 pieces of yellow and 12 pieces of transparent adhesive resin cement specimens were prepared in 0.2 mm thickness. Color measurements of the specimens were made on black and white backgrounds by a spectrophotometer. First color measurements were made on monolithic zirconium dioxide ceramic specimens. Then color mesuments were performed by matching ceramic specimens in each sintering group with yellow or transparent resin cement. Optical coupling of the resin cement and ceramic specimens was achieved by applying a refractive index solution. The Delta TP value of each specimen was calculated from the obtained data. Then statistical analyzes were performed.
Results: The lowest and the highest TP values were obtained from rapid sintering/ transparent resin cement group and rapid sintering/yellow resin cement group, respectively. There was no significant difference between the groups (p>0.05).
Conclusions: According to results of this study, combinations of the the sintering procedures applied and the color of the resin cement used did not effect the translucency parameter of monolithic zirconium dioxide ceramic restorations.