Eco-friendly reinforcement of dental composites with poly(methyl methacrylate) and hydroxyapatite synthesized from eggshell waste.

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

Dental Materials Pub Date : 2025-10-09 DOI:10.1016/j.dental.2025.10.002

Amine Yerou, Bel Abbes Bachir Bouiadjra, Omar Khatir, Mohamed Mokhtar Bouziane, Mohamed Elmeguenni, Mahmoud Khedr, Antti Järvenpää

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引用次数: 0

Abstract

Objectives: Hydroxyapatite (HAp), owing to its chemical similarity to enamel and bone, can enhance the bioactivity, biocompatibility, and antibacterial performance of poly(methyl methacrylate) (PMMA). This study aimed to develop and characterize a sustainable dental biocomposite by reinforcing PMMA with HAp synthesized from eggshell waste, with the objective of improving its mechanical and thermal performance while maintaining biocompatibility.

Methods: HAp was synthesized from eggshells via wet chemical precipitation followed by calcination. The resulting powder was incorporated into PMMA at 10, 20, and 30 wt% fractions. Composites were evaluated using Fourier-Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM). Mechanical properties were assessed under tensile and compressive loading.

Results: The synthesized HAp exhibited high purity and crystallinity. The composite containing 10 wt% HAp demonstrated the most balanced performance, with higher glass transition temperature, enhanced thermal stability, and improved tensile and compressive strength compared to pure PMMA. SEM analysis confirmed more homogeneous dispersion at low filler concentrations, while higher loadings (20-30 wt%) led to agglomeration and reduced performance.

Significance: Clinically, the optimized composite (10 wt% HAp) offers enhanced strength, durability, and thermal stability while maintaining biocompatibility, making it promising for dental prostheses, denture bases, and repair resins. This eco-friendly approach valorizes eggshell waste into a functional bioactive filler, supporting the advancement of sustainable dentistry.

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用蛋壳废料合成的聚甲基丙烯酸甲酯和羟基磷灰石环保型牙科复合材料。

目的：羟基磷灰石（Hydroxyapatite, HAp）由于其与牙釉质和骨的化学性质相似，可以增强聚甲基丙烯酸甲酯（PMMA）的生物活性、生物相容性和抗菌性能。本研究旨在开发一种可持续的牙科生物复合材料，利用蛋壳废料合成HAp增强PMMA，以提高其力学和热性能，同时保持其生物相容性。方法：以蛋壳为原料，经湿法化学沉淀法和煅烧法制备HAp。所得粉末以10、20和30 wt%的分数掺入PMMA中。采用傅里叶变换红外光谱（FTIR）、x射线衍射（XRD）、差示扫描量热法（DSC）、热重分析（TGA）和扫描电镜（SEM）对复合材料进行了评价。在拉伸和压缩载荷下评估了机械性能。结果：合成的HAp具有较高的纯度和结晶度。含有10 wt% HAp的复合材料表现出最平衡的性能，与纯PMMA相比，具有更高的玻璃化转变温度，增强的热稳定性以及提高的拉伸和抗压强度。SEM分析证实，填料浓度较低时分散性较均匀，而填料浓度较高（20-30 wt%）会导致团聚并降低性能。意义：在临床上，优化后的复合材料（10 wt% HAp）在保持生物相容性的同时，提供了更高的强度、耐久性和热稳定性，使其成为义齿、义齿基托和修复树脂的理想材料。这种环保的方法将蛋壳废物转化为功能性生物活性填料，支持可持续牙科的发展。

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.