Ozlem Malkondu1, Neslihan Tinastepe2, Ender Kazazoglu3. 1. Associate Professor, Department of Prosthodontics, Yeditepe University, Istanbul, Turkey. Electronic address: ozlemmalkondu@gmail.com. 2. Lecturer, Department of Prosthodontics, University of Yeditepe, Istanbul, Turkey. 3. Professor, Department of Prosthodontics, University of Yeditepe, Istanbul, Turkey.
Abstract
STATEMENT OF PROBLEM: With the development of translucent zirconia, questions regarding the influence of cements on the final color of monolithic zirconia restorations have arisen. PURPOSE: The purpose of this in vitro study was to evaluate color changes in terms of the perceptibility and acceptability of monolithic zirconia-and-cement combinations with 2 monolithic zirconia thicknesses and 3 types of cement. The translucency parameters of these combinations were also compared. MATERIAL AND METHODS: Sixty monolithic zirconia ceramic disks were milled with 2 different thicknesses (0.6 mm and 1 mm). A conventional glass ionomer cement, a resin-modified glass ionomer cement, and a resin cement from the same manufacturer were applied to the ceramic surfaces of both thickness disks (n=10). Translucencies and color changes of the monolithic zirconia specimens after cement application were examined by using a spectrophotometer, and translucency parameters (TPs) and color changes (ΔEs) were calculated and statistically analyzed. RESULTS: Colors and TPs of the zirconia disks changed significantly after being cemented to 0.6- and 1-mm-thick disks (P<.05). The lowest ΔE values (3.53 for the 0.6-mm and 2.23 for the 1-mm thick disks) were observed for the zirconia-resin modified glass ionomer combination, whereas the highest ΔE values (5.64 for the 0.6-mm and 5.06 for the 1-mm thick disks) were observed for the zirconia-resin cement combination. The glass ionomer cement most strongly affected the TP values of both of the thicknesses. CONCLUSIONS: Cement types and zirconia thickness affected the colors and translucencies of the monolithic zirconia specimens. Copyright Â
STATEMENT OF PROBLEM: With the development of translucent zirconia, questions regarding the influence of cements on the final color of monolithic zirconia restorations have arisen. PURPOSE: The purpose of this in vitro study was to evaluate color changes in terms of the perceptibility and acceptability of monolithic zirconia-and-cement combinations with 2 monolithic zirconia thicknesses and 3 types of cement. The translucency parameters of these combinations were also compared. MATERIAL AND METHODS: Sixty monolithic zirconia ceramic disks were milled with 2 different thicknesses (0.6 mm and 1 mm). A conventional glass ionomer cement, a resin-modified glass ionomer cement, and a resin cement from the same manufacturer were applied to the ceramic surfaces of both thickness disks (n=10). Translucencies and color changes of the monolithic zirconia specimens after cement application were examined by using a spectrophotometer, and translucency parameters (TPs) and color changes (ΔEs) were calculated and statistically analyzed. RESULTS: Colors and TPs of the zirconia disks changed significantly after being cemented to 0.6- and 1-mm-thick disks (P<.05). The lowest ΔE values (3.53 for the 0.6-mm and 2.23 for the 1-mm thick disks) were observed for the zirconia-resin modified glass ionomer combination, whereas the highest ΔE values (5.64 for the 0.6-mm and 5.06 for the 1-mm thick disks) were observed for the zirconia-resin cement combination. The glass ionomer cement most strongly affected the TP values of both of the thicknesses. CONCLUSIONS: Cement types and zirconia thickness affected the colors and translucencies of the monolithic zirconia specimens. Copyright Â
Authors: Christie M Tafur-Zelada; Oscar Carvalho; Filipe S Silva; Bruno Henriques; Mutlu Özcan; Júlio C M Souza Journal: Clin Oral Investig Date: 2021-03-30 Impact factor: 3.573
Authors: Milagros Adobes-Martín; Natividad Alcón; María Victoria López-Mollá; Javier Gámez-Payá; Estibaliz López-Fernández Journal: Int J Environ Res Public Health Date: 2022-04-13 Impact factor: 4.614