The effect of food-simulating liquids on the mechanical properties of lithium aluminosilicate glass-ceramics.

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

Dental Materials Pub Date : 2025-09-27 DOI:10.1016/j.dental.2025.09.015

Hanan Al-Johani, Ashraf Al-Amoudi, Adolfo Di Fiore, Yu Zhang

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引用次数: 0

Abstract

Objectives: To evaluate the impact of simulated aging with food-simulating liquids (FSLs) on the Martens hardness, indentation depth, flexural strength, and reliability of lithium aluminosilicate glass-ceramics.

Methods: Sixty square plates (12 ×12 ×1.5 mm) were prepared from a machinable fully crystallized lithium aluminosilicate glass-ceramic (Cerec Tessera, CT), then randomly allotted to four FSL groups: artificial saliva (CT-AS), citric acid (CT-CA), ethanol (CT-ET), or heptane (CT-HP). Martens hardness (HM) and indentation depth (ID) data were obtained using a hardness tester. Biaxial flexural strength (σ) was determined using the ball-on-three-balls apparatus in a universal testing machine. Weibull analysis was used to determine the characteristic strength (σ₀) and reliability (m̂_U). Data for HM and σ were analysed by one-way ANOVA, Tukey's HSD, and Pearson correlations (α = 0.05).

Results: FSL type had a significant effect on HM (p < 0.001, η_p² = 0.889), ID (p < 0.001, η_p² = 0.879), and σ (p < 0.001, η_p² = 0.623). Minimal differences were observed between the effects of artificial saliva and heptane on HM (p = 0.914), whereas citric acid (p < 0.001) and ethanol (p = 0.001) showed significantly different effects. The highest σ₀ and m̂_U values were found in CT-AS (σ₀ = 319.26 MPa, m̂_U = 10.79), while the lowest were observed in CT-CA. A positive correlation was confirmed between HM and σ (p < 0.001, r = 0.731).

Significance: Fully crystallized machinable lithium aluminosilicates exhibited adequate hardness and flexural strength after accelerated aging in artificial saliva; conversely, prolonged exposure to acidic FSLs jeopardized their mechanical properties.

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食物模拟液体对铝硅酸盐锂微晶玻璃力学性能的影响。

目的：评价食品模拟液（FSLs）模拟老化对铝硅酸锂微晶玻璃的马氏硬度、压痕深度、抗弯强度和可靠性的影响。方法：用可切削的全结晶铝硅酸盐锂玻璃陶瓷（Cerec Tessera， CT）制备60块方形板（12 ×12 ×1.5 mm），然后随机分为4个FSL组：人工唾液（CT- as）、柠檬酸（CT- ca）、乙醇（CT- et）和正丁烷（CT- hp）。使用硬度计获得马氏硬度（HM）和压痕深度（ID）数据。双轴抗折强度（σ）是在万能试验机上用球对三球仪测定的。采用威布尔分析确定了特征强度（σ0）和可靠度（m × U）。HM和σ数据采用单因素方差分析、Tukey’s HSD和Pearson相关分析（α = 0.05）。结果：FSL类型对HM （p p2 = 0.889）、ID （p p2 = 0.879）、σ （p p2 = 0.623）有显著影响。人工唾液和庚烷对HM的影响差异最小（p = 0.914），而柠檬酸对CT-AS的影响差异最小（p 0和m³U值）（σ0 = 319.26 MPa, m³U = 10.79），对CT-CA的影响最小。HM与σ （p ）呈正相关。意义在于：在人工唾液中加速老化后，完全结晶的可切削铝酸锂具有足够的硬度和抗弯强度，相反，长时间暴露于酸性铝酸锂中会损害其力学性能。

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.