Color stability of precolored and extrinsically colored monolithic multilayered polychromatic zirconia: Effects of surface finishing and aging

Author:

Abounassif Feras M.1,Alfaraj Amal23ORCID,Gadah Thuraya4,Yang Chao‐Chieh5ORCID,Chu Tien‐Min G.6ORCID,Lin Wei‐Shao3ORCID

Affiliation:

1. Dental Department Al Imam Abdulrahman Bin Faisal Hospital National Guard Health Affairs Dammam Saudi Arabia

2. Department of Prosthodontics College of Dentistry, King Faisal University Al Ahsa Saudi Arabia

3. Department of Prosthodontics Indiana University School of Dentistry Indianapolis Indiana USA

4. Department of Prosthodontics College of Dentistry, King Khalid University Abha Saudi Arabia

5. Advanced Education Program in Prosthodontics Department of Prosthodontics Indiana University School of Dentistry Indianapolis Indiana USA

6. Department of Biomedical Sciences and Comprehensive Care Indiana University School of Dentistry Indianapolis Indiana USA

Abstract

AbstractPurposeTo explore the impact of zirconia types, coloring methods, and surface finishing on the color stability of monolithic multilayered polychromatic zirconia after artificial aging, including thermocycling and simulated toothbrushing.Materials and MethodsEighty square‐shaped zirconia samples were divided into 2 types (M3Y‐TZP and M6Y‐PSZ), further categorized based on coloring methods (precolored and extrinsically colored) and surface finishing techniques (mechanical polishing or glazing). The color stability was assessed using the CIEDE2000 formula. Artificial aging was simulated via thermocycling and toothbrushing. All samples were analyzed with a spectrophotometer to determine the post‐aging color changes (ΔE00). The ΔE00 were interpreted and classified using the 50:50% perceptibility threshold (PT) and the 50:50% acceptability threshold (AT). Comparisons between groups for ΔE00 differences were performed using three‐way ANOVA, with pairwise comparisons facilitated by Fisher's protected least significant difference test, α = 0.05.ResultsThe study results indicated significant impacts of zirconia type, coloring method, and surface finishing on color stability. The M6Y groups experienced significantly greater color changes (6.61 ± 1.63) compared to the M3Y groups (3.40 ± 2.24), p < 0.0001. For both types of zirconia, extrinsically colored samples exhibited significantly higher ΔE00 when mechanically polished (p = 0.004). However, surface finishing had no significant effect on ΔE00 in precolored samples of either zirconia material (p = 1.000). The evaluation and categorization of ΔE00 variations indicated that nearly all color changes in the M6Y groups, regardless of being precolored, extrinsically colored, polished, or glazed, were deemed extremely unacceptable (Grade 1). In contrast, the M3Y groups showed more acceptable results, with the majority of color changes classified as moderately unacceptable (Grade 3).ConclusionsThe color stability of multilayered polychromatic zirconia is influenced by the type of material, extrinsic coloring, and the chosen surface treatment post‐artificial aging. The translucent 6Y‐PSZ exhibited lower color stability, especially with only mechanical polishing. For the fabrication of M3Y‐TZP and 6Y‐PSZ monolithic multilayered polychromatic zirconia restorations, extrinsic coloring should be paired with glazing to maintain color stability. Conversely, in the absence of extrinsic coloring, both glazing and mechanical polishing are effective in preserving color stability.

Publisher

Wiley

Reference46 articles.

1. Zirconia based dental ceramics: structure, mechanical properties, biocompatibility and applications

2. Monolithic zirconia: an update to current knowledge. Optical properties, wear, and clinical performance;Kontonasaki E;J Dent,2019

3. Color Aspect of Monolithic Zirconia Restorations: A Review of the Literature

4. Sorrell CC. A review of the characteristics and optimization of optical properties of zirconia ceramics for aesthetic dental restorations;Shahmiri RA;Int J Biomed Biol Eng,2017

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3