Hanan Al-Johani, Ashraf Al-Amoudi, Adolfo Di Fiore, Yu Zhang
{"title":"食物模拟液体对铝硅酸盐锂微晶玻璃力学性能的影响。","authors":"Hanan Al-Johani, Ashraf Al-Amoudi, Adolfo Di Fiore, Yu Zhang","doi":"10.1016/j.dental.2025.09.015","DOIUrl":null,"url":null,"abstract":"<p><strong>Objectives: </strong>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.</p><p><strong>Methods: </strong>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 (σ<sub>0</sub>) and reliability (m̂<sub>U</sub>). Data for HM and σ were analysed by one-way ANOVA, Tukey's HSD, and Pearson correlations (α = 0.05).</p><p><strong>Results: </strong>FSL type had a significant effect on HM (p < 0.001, η<sub>p</sub><sup>2</sup> = 0.889), ID (p < 0.001, η<sub>p</sub><sup>2</sup> = 0.879), and σ (p < 0.001, η<sub>p</sub><sup>2</sup> = 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 σ<sub>0</sub> and m̂<sub>U</sub> values were found in CT-AS (σ<sub>0</sub> = 319.26 MPa, m̂<sub>U</sub> = 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).</p><p><strong>Significance: </strong>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.</p>","PeriodicalId":298,"journal":{"name":"Dental Materials","volume":" ","pages":""},"PeriodicalIF":6.3000,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The effect of food-simulating liquids on the mechanical properties of lithium aluminosilicate glass-ceramics.\",\"authors\":\"Hanan Al-Johani, Ashraf Al-Amoudi, Adolfo Di Fiore, Yu Zhang\",\"doi\":\"10.1016/j.dental.2025.09.015\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objectives: </strong>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.</p><p><strong>Methods: </strong>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 (σ<sub>0</sub>) and reliability (m̂<sub>U</sub>). Data for HM and σ were analysed by one-way ANOVA, Tukey's HSD, and Pearson correlations (α = 0.05).</p><p><strong>Results: </strong>FSL type had a significant effect on HM (p < 0.001, η<sub>p</sub><sup>2</sup> = 0.889), ID (p < 0.001, η<sub>p</sub><sup>2</sup> = 0.879), and σ (p < 0.001, η<sub>p</sub><sup>2</sup> = 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 σ<sub>0</sub> and m̂<sub>U</sub> values were found in CT-AS (σ<sub>0</sub> = 319.26 MPa, m̂<sub>U</sub> = 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).</p><p><strong>Significance: </strong>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.</p>\",\"PeriodicalId\":298,\"journal\":{\"name\":\"Dental Materials\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-09-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Dental Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1016/j.dental.2025.09.015\",\"RegionNum\":1,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"DENTISTRY, ORAL SURGERY & MEDICINE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dental Materials","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.dental.2025.09.015","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
The effect of food-simulating liquids on the mechanical properties of lithium aluminosilicate glass-ceramics.
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 (m̂U). 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, ηp2 = 0.889), ID (p < 0.001, ηp2 = 0.879), and σ (p < 0.001, ηp2 = 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 m̂U values were found in CT-AS (σ0 = 319.26 MPa, m̂U = 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.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
