Former Postgraduate student, Department of Fixed Prosthodontics, Faculty of Oral and Dental Medicine, Future University, New Cairo, Egypt.
Professor, Department of Fixed Prosthodontics, Faculty of Oral and Dental Medicine, Future University, New Cairo, Egypt.
J Prosthet Dent. 2023 Aug;130(2):253.e1-253.e7. doi: 10.1016/j.prosdent.2023.05.001. Epub 2023 Jun 15.
Rapid sintering protocols are available for the fabrication of zirconia restorations, but whether rapid sintering influences color or translucency is unclear.
The purpose of this in vitro study was to investigate the effect of different rapid sintering protocols on the color and translucency of cubic and tetragonal zirconias.
Sixty disk-shaped specimens of 1-mm-thick cubic (DD CubeX) and tetragonal (DD Bio ZX) zirconia were investigated. Specimens of each type of zirconia were divided into three groups: conventional, speed, and superspeed sintering protocols. The conventional group of each zirconia type served as the control for calculating color differences. Translucency for each group was assessed by the translucency parameter and contrast ratio. Two-way analysis of variance was used for statistical analysis of the data (α=.05).
The translucency of cubic and tetragonal zirconia decreased after speed and superspeed sintering (P<.001). Superspeed sintering resulted in a greater color change than speed sintering (P<.001).
Rapid sintering protocols produced a significant effect on the color and translucency of cubic and tetragonal zirconias.
目前已有用于氧化锆修复体快速烧结的方案，但快速烧结是否会影响颜色和半透明度尚不清楚。
本体外研究的目的在于探究不同快速烧结方案对立方氧化锆和四方氧化锆的颜色和半透明度的影响。
本研究对 60 个 1mm 厚的立方（DD CubeX）和四方（DD Bio ZX）氧化锆的圆盘状试件进行了研究。每种类型的氧化锆试件均分为三组：常规、快速和超快速烧结方案。每种氧化锆类型的常规组为计算颜色差异的对照组。通过半透明度参数和对比率评估每组的半透明度。采用双向方差分析对数据进行统计学分析（α=.05）。
快速和超快速烧结后，立方和四方氧化锆的半透明度降低（P<.001）。超快速烧结比快速烧结导致更大的颜色变化（P<.001）。
快速烧结方案对立方和四方氧化锆的颜色和半透明度有显著影响。
