不同浓度硅烷化二氧化钛纳米颗粒增强的热聚合聚甲基丙烯酸甲酯义齿基托树脂吸水性的比较评价：一项研究。

Comparative Evaluation of Water Sorption of Heat-Polymerized Polymethyl Methacrylate Denture Base Resin Reinforced with Different Concentrations of Silanized Titanium Dioxide Nanoparticles: An Study.

作者信息

Tekale Rahul G, Mowade Tushar K, Radke Usha M

机构信息

Department of Prosthodontics, V.S.P.M. Dental College and Research Centre, Nagpur, India.

Maharashtra University of Health Sciences, Nashik, Maharashtra, India.

出版信息

Contemp Clin Dent. 2019 Apr-Jun;10(2):269-273. doi: 10.4103/ccd.ccd_499_18.

DOI:10.4103/ccd.ccd_499_18

PMID:32308289

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7145259/

Abstract

STATEMENT OF PROBLEM

Polymethyl methacrylate (PMMA) is the most regularly used material in denture fabrication. Water sorption of denture base PMMA denture base resin has negative effects on physical properties, may lead to harmful tissue reactions in patients, and also has detrimental effects on color stability of the denture base.

PURPOSE

The purpose of this study was to evaluate the effect on water sorption of heat-cured PMMA denture base material after incorporation of 1%, 3%, and 5% by weight of silanized titanium dioxide (TiO) nanoparticles.

MATERIALS AND METHODS

For preparation of test samples, TiO nanoparticles (PCode: 700339, Sigma-Aldrich, USA) were coated with a layer of trimethoxysilylpropylmethacrylate (PCode: 440159, Sigma-Aldrich, USA) before sonicated in monomer (MMA) (DPI Heat Cure) with the percentages 1%, 3%, and 5% by weight; after sonication, it was mixed with PMMA powder using conventional denture fabrication procedure. Then, we prepared total 40 samples for study; 10 samples for each four groups, i.e. that is one control group and three experimental groups. The first group was prepared from PMMA without addition of TiO nanoparticles (control group), the second group with the addition of 1 wt% TiO nanoparticles, the third group with 3 wt% TiO nanoparticles, and the fourth one with 5 wt% TiO nanoparticles (experimental groups). Water sorption test was then conducted on each sample.

RESULTS

Each group was evaluated for water sorption test, and it was found that increasing the wt% of nanoparticles, there was a significant decrease in water sorption of denture base resin from 1.74 to 1.46 mean wt%. value suggested that the difference of mean percent increase across all groups was statistically significant with = 0.034.

CONCLUSION

The maximum decrease in water sorption was observed in denture base resin incorporated with 5 wt% TiO nanoparticles.

摘要

问题陈述

聚甲基丙烯酸甲酯（PMMA）是义齿制作中最常用的材料。义齿基托PMMA义齿基托树脂的吸水性会对物理性能产生负面影响，可能导致患者出现有害的组织反应，并且对义齿基托的颜色稳定性也有不利影响。

目的

本研究的目的是评估在热固化PMMA义齿基托材料中加入1%、3%和5%重量比的硅烷化二氧化钛（TiO）纳米颗粒后对吸水性的影响。

材料与方法

为制备测试样品，将TiO纳米颗粒（产品编号：700339，美国西格玛奥德里奇公司）用一层甲基丙烯酸三甲氧基硅丙酯（产品编号：440159，美国西格玛奥德里奇公司）包覆，然后按1%、3%和5%重量比在单体（甲基丙烯酸甲酯）（DPI热固化）中超声处理；超声处理后，使用传统义齿制作程序将其与PMMA粉末混合。然后，我们总共制备了40个样品用于研究；四个组每组10个样品，即一个对照组和三个实验组。第一组由未添加TiO纳米颗粒的PMMA制备（对照组），第二组添加1 wt%的TiO纳米颗粒，第三组添加3 wt%的TiO纳米颗粒，第四组添加5 wt%的TiO纳米颗粒（实验组）。然后对每个样品进行吸水性测试。