Towards the Standardization of Artificial Aging Protocols for Dental Composites: Evaluation of Proposed Methods.

IF 5 3区医学 Q1 ENGINEERING, BIOMEDICAL Journal of Functional Biomaterials Pub Date : 2025-02-04 DOI:10.3390/jfb16020049

Agata Szczesio-Wlodarczyk, Karolina Kopacz, Katarzyna Ranoszek-Soliwoda, Jerzy Sokolowski, Kinga Bociong

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Abstract

In restorative dentistry, there are no standardized in vitro accelerated aging methods to evaluate the long-term stability of dental composites. Current research aimed at extending the clinical success of restorations emphasizes the need for post-aging evaluation. This study represents the final stage of assessing three selected aging protocols that utilize a 0.1 M sodium hydroxide solution as the primary agent to accelerate degradation processes. Twelve resin-based composites, categorized into five types, were evaluated for flexural strength (FS), diametral tensile strength (DTS), hardness (HV), and fracture toughness (FT) both before and after aging. The proposed aging methods significantly degraded the mechanical properties of most materials, highlighting the effectiveness of 0.1 M NaOH as a medium for hydrolytic stability testing. Materials with a high filler content (approximately 80 wt.%) were notably prone to degradation, underscoring the importance of optimizing the filler and coupling agent. The findings suggest that incorporating thermocycling into aging protocols may enhance the development and evaluation of innovative dental composites. This work contributes to establishing a foundation for standardized aging protocols, supporting the accurate assessment of composites in vitro.

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在牙科修复领域，还没有标准化的体外加速老化方法来评估牙科复合材料的长期稳定性。目前旨在延长修复体临床成功率的研究强调了进行老化后评估的必要性。本研究是对三种选定老化方案进行评估的最后阶段，这些方案使用 0.1 M 氢氧化钠溶液作为加速降解过程的主剂。研究人员将 12 种树脂基复合材料分为五种类型，分别在老化前和老化后对其抗弯强度 (FS)、直径拉伸强度 (DTS)、硬度 (HV) 和断裂韧性 (FT) 进行了评估。所建议的老化方法明显降低了大多数材料的机械性能，突出了 0.1 M NaOH 作为水解稳定性测试介质的有效性。填料含量较高（约 80 wt.%）的材料明显容易发生降解，这凸显了优化填料和偶联剂的重要性。研究结果表明，将热循环纳入老化方案可促进创新牙科复合材料的开发和评估。这项工作有助于为标准化老化方案奠定基础，支持对复合材料进行准确的体外评估。

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来源期刊

Journal of Functional Biomaterials Engineering-Biomedical Engineering

CiteScore

4.60

自引率

4.20%

发文量

226

审稿时长

11 weeks

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.