Impact of ceria-yttria pigmentation on the mechanical performance and esthetics of zirconia dental restorations.

IF 6.3 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Materials Pub Date : 2025-10-06 DOI:10.1016/j.dental.2025.09.014

Sivaranjani Gali, Akshay Arjun, Suhasini Gururaja

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引用次数: 0

Abstract

Background: An optimum combination of esthetics and mechanical properties is expected of all-ceramic restorations. Consequently, various pigmentation techniques of zirconia have been recommended to enhance the aesthetic results without compromising their long-term survival.

Methodology: Infiltrate solutions of ceria-yttria were prepared by mixing their precursors in various concentrations. Pre-sintered zirconia samples were soaked in the infiltrate solutions and sintered according to the manufacturer's instructions. Phase analysis, microstructure using scanning electron microscopy, flexural strength, fatigue, CIE Lab, translucency parameter, surface roughness, and aging resistance of infiltrated zirconia were evaluated.

Results: Phase analysis confirmed the presence of the tetragonal phase of zirconia, and the microstructure revealed increased grain size. The flexural strength of infiltrated zirconia ranged from 248 MPa to 512 MPa, and the fatigue limit was lower than control zirconia with reduced surface roughness. The monoclinic content before and after aging was not detectable in the infiltrated samples. The CIE Lab values of the infiltrated samples showed a trend of decreasing lightness, accompanied by higher delta E values, with minimal change in translucency.

Conclusions: Ceria-yttria infiltrated zirconia exhibited reasonable flexural strength and fatigue performance, with improved aging resistance, and color suitable for anterior and low-stress-bearing monolithic restorations.

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氧化锆-氧化钇色素沉积对氧化锆牙体修复体力学性能和美观的影响。

背景：美学和机械性能的最佳组合被期望全陶瓷修复。因此，各种氧化锆着色技术已被推荐，以提高美观的结果，而不影响其长期生存。方法：用不同浓度的前驱体混合制备铈钇的浸润溶液。预烧结的氧化锆样品浸泡在渗透溶液中，并按照制造商的说明进行烧结。对渗透氧化锆的物相分析、扫描电镜显微结构、抗弯强度、疲劳强度、CIE Lab、半透明参数、表面粗糙度和抗老化性能进行了评价。结果：相分析证实了氧化锆的四方相存在，显微组织显示晶粒尺寸增大。浸渍氧化锆的抗折强度在248 ~ 512 MPa之间，疲劳极限低于对照氧化锆，表面粗糙度降低。浸渍样品在时效前后均未检测到单斜晶含量。浸渍样品的CIE Lab值显示出亮度下降的趋势，同时δ E值升高，半透明变化最小。结论：氧化铈-氧化钇浸润氧化锆具有合理的抗弯强度和疲劳性能，具有较好的抗老化性能，颜色适合于前路和低应力单体修复。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.