Effect of Repeated Firings on Color Stability of Zirconia- Reinforced Lithium Silicate and Lithium Disilicate Ceramics.

IF 1.1 Q3 DENTISTRY, ORAL SURGERY & MEDICINE European Journal of Prosthodontics and Restorative Dentistry Pub Date : 2024-11-13 DOI:10.1922/EJPRD_2466Habibkhodaei07

M Habibkhodaei, R Mosharraf, O Savabi, F Salehi Ghalesefid

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Abstract

Purpose: The purpose of this invitro study was to assess the changes in the color attributes of high-translucency (HT) lithium disilicate and zirconia-reinforced lithium silicate in BL3/0M1, A1, A2, and A3 shades during first, second, and third firing cycles.

Materials and methods: Eighty specimens of two ceramic systems (IPS e.max CAD and Vita Suprinity) in BL3/0M1, A1, A2, and A3 shades, were prepared in thickness of 1 mm (n=10). Each group was subjected to 3 firing cycles and the CIE L*a*b* color parameters of specimens were measured after each firing cycle by a reflectance spectrophotometer. The color change (ΔE) between each two firing cycles was calculated by the relevant equation. Data were analyzed by one-way ANOVA and Tamhane post hoc test.

Results: All ΔE values were significant (P⟨0.001) except for ΔE2-1 (color difference between second and first firing) and ΔE3-2 (color difference between third and second firing) in A2 shade of IPS e.max (P=0.436) and ΔE2-1 and ΔE3-2 in 0M1 shade of Suprinity (P=0.345).

Conclusion: Repeated firing resulted in generally higher ΔE in ZLS than LDS, and 0M1 Suprinity experienced maximum ΔE after repeating firing.

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反复烧结对氧化锆增强型硅酸锂和二硅酸锂陶瓷颜色稳定性的影响

目的：这项体外研究的目的是评估BL3/0M1、A1、A2和A3色调的高透明度（HT）二硅酸锂和氧化锆增强硅酸锂在第一、第二和第三烧结周期中颜色属性的变化：制备了两种陶瓷系统（IPS e.max CAD 和 Vita Suprinity）的 80 个试样，色调分别为 BL3/0M1、A1、A2 和 A3，厚度均为 1 毫米（n=10）。每组试样经过 3 个烧制周期，每个烧制周期结束后用反射分光光度计测量试样的 CIE L*a*b* 颜色参数。每两个焙烧周期之间的颜色变化（ΔE）由相关公式计算得出。数据分析采用单因素方差分析和 Tamhane 后检验：除了 IPS e.max 的 A2 色调中的ΔE2-1（第二次与第一次焙烧之间的色差）和ΔE3-2（第三次与第二次焙烧之间的色差）（P=0.436）以及 Suprinity 的 0M1 色调中的ΔE2-1 和 ΔE3-2（P=0.345）之外，所有的ΔE 值都具有显著性（P⟨0.001）：重复焙烧导致 ZLS 的 ΔE 普遍高于 LDS，0M1 Suprinity 在重复焙烧后出现最大 ΔE。

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来源期刊

European Journal of Prosthodontics and Restorative Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.30

自引率

7.70%

发文量

期刊介绍： The European Journal of Prosthodontics and Restorative Dentistry is published quarterly and includes clinical and research articles in subjects such as prosthodontics, operative dentistry, implantology, endodontics, periodontics and dental materials.