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系统改变硫脲烷官能化填料浓度对牙科复合材料聚合行为及相关临床性能的影响。

Effects of systematically varied thiourethane-functionalized filler concentration on polymerization behavior and relevant clinical properties of dental composites.

作者信息

Lewis S H, App Fugolin, Lam S, Scanlon C, Ferracane J L, Pfeifer C S

机构信息

Oregon Health & Science University, Department of Restorative Dentistry, Biomaterials and Biomechanics, United States of America.

Apprenticeships in Science and Engineering (ASE, Saturday Academy), United States of America.

出版信息

Mater Des. 2021 Jan 1;197. doi: 10.1016/j.matdes.2020.109249. Epub 2020 Oct 21.

DOI:10.1016/j.matdes.2020.109249
PMID:33162633
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7641517/
Abstract

Introduction of thiourethane (TU) oligomer to resin-based dental restorative materials reduces stress and improves fracture toughness without compromising conversion. Localization of TU at the resin-filler interface via silanization procedures may lead to more substantial stress reduction and clinical property enhancements. The objective of this study was to evaluate composite properties as a function of TU-functionalized filler concentration. TU oligomers were synthesized using click-chemistry techniques and subsequently silanized to barium glass filler. Resin-based composites were formulated using varying ratios of TU-functionalized filler and conventional methacrylate-silanized barium filler. Material property testing included thermogravimetric analysis, real-time polymerization kinetics and depth of cure, polymerization stress, stress relaxation and fracture toughness. Clinical property testing included water sorption/solubility, composite paste viscosity, and gloss and surface roughness measured before and after subjecting the samples to 6 h of continuous tooth brushing in a custom-built apparatus using a toothpaste/water mixture. Increasing TU-filler in the composite resulted in as much as a 78% reduction in stress, coupled with an increase in fracture toughness. Conversion was similar for all groups. After simulated tooth brushing, gloss reduction was lower for TU-containing composites and surface roughness was less than or equal to the control.

摘要

将硫代聚氨酯（TU）低聚物引入树脂基牙科修复材料可降低应力并提高断裂韧性，同时不影响转化率。通过硅烷化程序使TU定位在树脂-填料界面可能会导致更大程度的应力降低和临床性能提升。本研究的目的是评估复合材料性能与TU功能化填料浓度的关系。使用点击化学技术合成TU低聚物，随后将其硅烷化到钡玻璃填料上。使用不同比例的TU功能化填料和传统甲基丙烯酸酯硅烷化钡填料配制树脂基复合材料。材料性能测试包括热重分析、实时聚合动力学和固化深度、聚合应力、应力松弛和断裂韧性。临床性能测试包括吸水率/溶解度、复合糊剂粘度，以及在定制装置中使用牙膏/水混合物对样品进行6小时连续刷牙前后测量的光泽度和表面粗糙度。复合材料中TU填料的增加导致应力降低多达78%，同时断裂韧性增加。所有组的转化率相似。模拟刷牙后，含TU的复合材料的光泽度降低较小，表面粗糙度小于或等于对照组。

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Dent Mater. 2019 Nov;35(11):1523-1531. doi: 10.1016/j.dental.2019.07.015. Epub 2019 Aug 5.
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Nanogel-Based Filler-Matrix Interphase for Polymerization Stress Reduction.基于纳米凝胶的填充基质相间用于降低聚合应力。
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