Marwa M Alnsour, Rasha A Alamoush, Nikolaos Silikas, Julian D Satterthwaite
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Flexural strength and elastic modulus were evaluated using a three-point flexural strength test with acoustic emission (AE) monitoring. Vickers microhardness was measured before and after storage in gastric acid and Coca-Cola. Data were statistically analysed using two-way and one-way ANOVA, the Tukey's post hoc, and independent <i>t</i>-test at a significance level of 0.05. The results showed that Cs and En maintained their flexural strength and elastic modulus after acidic media exposure, while Gr experienced a significant decrease in flexural strength following gastric acid storage (<i>p</i> < 0.01). Initial crack detection was not possible using the AE system, impacting the determination of flexural strength. Exposure to acidic media decreased all materials' microhardness, with Gr showing the most notable reduction (<i>p</i> < 0.0001). Gastric acid had a greater impact on the microhardness of all tested materials compared to Coca-Cola (<i>p</i> < 0.0001). In conclusion, storage in erosive media did not notably affect the flexural strength or elastic modulus of CAD/CAM composites but it did affect hardness. CAD/CAM composite blocks demonstrated superior mechanical properties compared to the conventional composite.</p>","PeriodicalId":15767,"journal":{"name":"Journal of Functional Biomaterials","volume":null,"pages":null},"PeriodicalIF":5.0000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11508220/pdf/","citationCount":"0","resultStr":"{\"title\":\"The Effect of Erosive Media on the Mechanical Properties of CAD/CAM Composite Materials.\",\"authors\":\"Marwa M Alnsour, Rasha A Alamoush, Nikolaos Silikas, Julian D Satterthwaite\",\"doi\":\"10.3390/jfb15100292\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This study aimed to investigate the effect of acidic media storage (gastric acid and Coca-Cola) on the mechanical properties of CAD/CAM materials. 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引用次数: 0
摘要
本研究旨在探讨酸性介质储存（胃酸和可口可乐）对 CAD/CAM 材料机械性能的影响。测试了三种材料：聚合物浸润陶瓷网络（PICN）（Vita Enamic (En)，德国 VITA Zahnfabrik 公司）、树脂复合材料块（RCB）（Cerasmart (Cs)，日本 GC 公司）和作为对照的传统树脂复合材料（Gradia direct (Gr)，日本 GC 公司）。每种材料都制备了尺寸为 16 mm × 4 mm × 1.5 mm 的梁状试样（共 90 个）。将试样分成若干组（每组 10 个），在胃酸、可口可乐或蒸馏水中存放 96 小时。采用声发射（AE）监测的三点抗弯强度测试评估抗弯强度和弹性模量。在胃酸和可口可乐中储存前后测量了维氏硬度。数据采用双向和单向方差分析、Tukey 后检验和独立 t 检验进行统计分析，显著性水平为 0.05。结果表明，Cs 和 En 在接触酸性介质后保持了抗折强度和弹性模量，而 Gr 在胃酸储存后抗折强度显著下降（p < 0.01）。使用 AE 系统无法进行初始裂纹检测，这影响了抗弯强度的测定。暴露在酸性介质中会降低所有材料的显微硬度，其中 Gr 的降低最为明显（p < 0.0001）。与可口可乐相比，胃酸对所有测试材料显微硬度的影响更大（p < 0.0001）。总之，在侵蚀性介质中储存不会明显影响 CAD/CAM 复合材料的抗弯强度或弹性模量，但会影响硬度。与传统复合材料相比，CAD/CAM 复合材料砌块表现出更优越的机械性能。
The Effect of Erosive Media on the Mechanical Properties of CAD/CAM Composite Materials.
This study aimed to investigate the effect of acidic media storage (gastric acid and Coca-Cola) on the mechanical properties of CAD/CAM materials. Three types of materials were tested: a polymer-infiltrated ceramic network (PICN) (Vita Enamic (En), VITA Zahnfabrik, Germany), a resin composite block (RCB) (Cerasmart (Cs), GC Corp, Japan), and a conventional resin-based composite (Gradia direct (Gr), GC Corp, Japan), which was used as a control. Beam-shaped specimens of each material, with dimensions of 16 mm × 4 mm × 1.5 mm, were prepared (90 in total). The specimens were divided into subgroups (10 each) and stored for 96 h in either gastric acid, Coca-Cola, or distilled water. Flexural strength and elastic modulus were evaluated using a three-point flexural strength test with acoustic emission (AE) monitoring. Vickers microhardness was measured before and after storage in gastric acid and Coca-Cola. Data were statistically analysed using two-way and one-way ANOVA, the Tukey's post hoc, and independent t-test at a significance level of 0.05. The results showed that Cs and En maintained their flexural strength and elastic modulus after acidic media exposure, while Gr experienced a significant decrease in flexural strength following gastric acid storage (p < 0.01). Initial crack detection was not possible using the AE system, impacting the determination of flexural strength. Exposure to acidic media decreased all materials' microhardness, with Gr showing the most notable reduction (p < 0.0001). Gastric acid had a greater impact on the microhardness of all tested materials compared to Coca-Cola (p < 0.0001). In conclusion, storage in erosive media did not notably affect the flexural strength or elastic modulus of CAD/CAM composites but it did affect hardness. CAD/CAM composite blocks demonstrated superior mechanical properties compared to the conventional composite.
期刊介绍：
Journal of Functional Biomaterials (JFB, ISSN 2079-4983) is an international and interdisciplinary scientific journal that publishes regular research papers (articles), reviews and short communications about applications of materials for biomedical use. JFB covers subjects from chemistry, pharmacy, biology, physics over to engineering. The journal focuses on the preparation, performance and use of functional biomaterials in biomedical devices and their behaviour in physiological environments. Our aim is to encourage scientists to publish their results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Several topical special issues will be published. Scope: adhesion, adsorption, biocompatibility, biohybrid materials, bio-inert materials, biomaterials, biomedical devices, biomimetic materials, bone repair, cardiovascular devices, ceramics, composite materials, dental implants, dental materials, drug delivery systems, functional biopolymers, glasses, hyper branched polymers, molecularly imprinted polymers (MIPs), nanomedicine, nanoparticles, nanotechnology, natural materials, self-assembly smart materials, stimuli responsive materials, surface modification, tissue devices, tissue engineering, tissue-derived materials, urological devices.
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