Investigating the Mechanisms of Discoloration in Modern Dental Materials: A Comprehensive Characterization Approach.

IF 5 3区医学 Q1 ENGINEERING, BIOMEDICAL Journal of Functional Biomaterials Pub Date : 2024-08-27 DOI:10.3390/jfb15090246

Maria Gawriołek, Naisargi Varma, Amadeusz Hernik, Wojciech Eliasz, Marta Strykowska, Elżbieta Paszyńska, Beata Czarnecka, Marek Sikorski

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Abstract

In general, patients' opinions on reaching ideal esthetics while restoring dental tissues is one of the most important part of the oral treatment. Unfortunately, discoloration of dental materials may occur due to intrinsic and extrinsic factors. The aim of the study was to evaluate the color stability of frequently used dental resin materials and determine the mechanism of their discoloration. The study used various characterization techniques (optical microscopy, Fourier-transform infrared spectroscopy, low-temperature N₂ adsorption, diffuse reflectance spectroscopy, and luminescence) to understand the effect of surface defects on discoloration. The adsorption of model liquids on the surface was confirmed to be related to the increase in BET surface area. The study found that the adsorption of discolorants, such as coffee, tea, and wine, on the surface of the dental material follows the multilayer BET model. When the surface is smooth, the discoloration is usually within acceptable limits, with a maximum of ∆E = 3.3. The discoloration made by tea and demineralized water was within acceptable limits even after 7 days of exposure.

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研究现代牙科材料的变色机制：综合表征法

一般来说，在修复牙体组织的同时达到理想的美观效果，患者的意见是口腔治疗中最重要的部分之一。不幸的是，由于内在和外在因素，牙科材料可能会变色。本研究旨在评估常用牙科树脂材料的颜色稳定性，并确定其变色的机理。研究采用了多种表征技术（光学显微镜、傅立叶变换红外光谱、低温 N2 吸附、漫反射光谱和发光）来了解表面缺陷对变色的影响。研究证实，模型液体在表面的吸附与 BET 表面积的增加有关。研究发现，咖啡、茶和酒等变色剂在牙科材料表面的吸附遵循多层 BET 模型。当表面光滑时，变色通常在可接受的范围内，最大值为 ∆E = 3.3。茶水和去矿物质水造成的变色即使在暴露 7 天后也在可接受的范围内。

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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.