三种不同透明度牙科陶瓷的遮盖性研究

A. Mohamed, Osama Abd-Elghany, Shereen Abdul-Hameed
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摘要

目的:研究三种不同透光率的牙用陶瓷的遮盖性。材料与方法:采用三种牙科陶瓷材料(高半透明氧化锆、低半透明IPS E.max CAD和半透明Vita Suprinity)制作54个陶瓷盘。三种牙陶瓷的色度为A2。他们被分成三组(n=18)。每组根据复合基材颜色(A4, B4, C4)再分为3个亚组(n=6),每个陶瓷盘用半透明树脂水泥胶结。色差(∆E)和半透明参数(TP)用分光光度计测定。结果:骨水泥前,IPS E.max中位TP值最高。在颜色变化方面,三种牙陶瓷类型之间没有统计学差异。此外,三种颜色的复合基材(A4, B4, C4)之间存在无统计学意义的差异。结论:IPS E.max(低透性)的透光性优于半透明vita和高透性氧化锆。在所有类型的陶瓷中,用半透明树脂水泥胶结后,半透明参数(TP)均有统计学意义的降低。三种牙科陶瓷的颜色变化(∆E)均超过了可感知的极限,因此,所测陶瓷没有足够的遮盖能力来掩盖所使用的复合色调(A4, B4, C4)的深色基材。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Color Masking Ability of Three Dental Ceramics with Different Translucencies
Purpose: the aim of this study was to evaluate the color masking ability of three dental ceramics with different translucencies. Materials and methods: Fifty-four discs of ceramics were made from three dental ceramic materials (High translucency zirconia, low translucency IPS E.max CAD and translucent Vita Suprinity). Shade of three dental ceramics was A2. They were divided into three equal groups (n=18). Each group was subdivided into three subgroups (n=6) according to composite substrate shade (A4, B4, C4) on which each ceramic disc was cemented with translucent resin cement. Color difference(∆E) and translucency parameter (TP) were evaluated by spectrophotometer. Results: Before cementation, IPS E.max showed the highest median TP values. As regards color change, no statistically significant difference between the three dental ceramic types was found. Also, non-statistical significance difference between three shades of composite substrate (A4, B4, C4). Conclusions: IPS E.max (low translucency) shows better translucency than translucent vita suprinity and High translucency zirconia. In all types of ceramics, there was statistically significant decrease in translucency parameter (TP) after cementation with translucent resin cement. The color changes (∆E) exceeded the perceptible limit for the three types of dental ceramic, so it was concluded that the tested ceramics didn’t exhibit sufficient color masking ability to hide the dark substrate of the composite shades used (A4, B4, C4).
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