通过模拟刷牙添加纳米羟基磷灰石颗粒对树脂改性玻璃离子水门汀磨损的影响。
Effect of addition of Nano hydroxyapatite particles on wear of resin modified glass ionomer by tooth brushing simulation.
作者信息
Poorzandpoush Kiana, Omrani Ladan-Ranjbar, Jafarnia Shiva H, Golkar Parisa, Atai Mohammad
机构信息
DMD, Pediatric Dentistry post graduate student, Dental Students Scientific research Center, Dental School, Tehran University OF Medical Sciences, Tehran, Iran.
MSc's, Assistant Professor, Head of Dental Students Research Center, Operative Dentistry Department, Dental School, Tehran University of Medical Sciences, Tehran, Iran.
出版信息
J Clin Exp Dent. 2017 Mar 1;9(3):e372-e376. doi: 10.4317/jced.53455. eCollection 2017 Mar.
BACKGROUND
Recently, incorporation of nanohydroxyapatite (NHA) has been suggested to improve the mechanical properties of glass ionomers (GIs). This study aimed to assess the effect of addition of NHA on wear of resin modified glass ionomer (RMGI) by tooth brushing simulation.
MATERIAL AND METHODS
In this , experimental study, NHA in 1, 2, 5, 7 and 10wt% concentrations was added to Fuji II LC RMGI powder, and 48 samples (5×5mm) in five experimental and one control group (n=8) were fabricated. After polishing, cleaning and incubation at 37°C for three weeks, the samples were weighed and subjected to tooth brushing simulation in a toothpaste slurry according to ISO14569-1. Then, they were weighed again and the weight loss was calculated. The data were analyzed using one-way ANOVA and Tukey's test.
RESULTS
The highest and the lowest weight loss was found in the 0% NHA (-1.052±0.176) and 5% NHA (-0.370±0.143) groups, respectively. Wear was significantly higher in 0% NHA group (<0.05). No difference was detected in wear between 2 and 5wt% NHA or among 1, 7 and 10wt% NHA groups. Significant differences were noted in wear between 2 and 5wt% NHA and 1, 7 and 10wt% NHA groups (<0.001).
CONCLUSIONS
Incorporation of up to 10wt% of NHA increases the wear resistance of Fuji II LC RMGI. This increase was the highest when 2 and 5wt% NHA were added. Glass ionomer, hydroxyapatites, nanoparticles, dental restoration wear.
背景
最近，有人提出加入纳米羟基磷灰石（NHA）可改善玻璃离子水门汀（GIs）的机械性能。本研究旨在通过刷牙模拟评估添加NHA对树脂改性玻璃离子水门汀（RMGI）磨损的影响。
材料与方法
在本实验研究中，将浓度为1%、2%、5%、7%和10%的NHA添加到Fuji II LC RMGI粉末中，制备了五个实验组和一个对照组（n = 8）的48个样品（5×5mm）。抛光、清洁并在37°C下孵育三周后，对样品进行称重，并根据ISO14569-1在牙膏浆液中进行刷牙模拟。然后，再次称重并计算重量损失。使用单因素方差分析和Tukey检验对数据进行分析。
结果
分别在0% NHA组（-1.052±0.176）和5% NHA组（-0.370±0.143）中发现最高和最低重量损失。0% NHA组的磨损明显更高（<0.05）。在2%和5% NHA组之间或1%、7%和10% NHA组之间未检测到磨损差异。在2%和5% NHA组与1%、7%和10% NHA组之间的磨损存在显著差异（<0.001）。
结论
加入高达10%的NHA可提高Fuji II LC RMGI的耐磨性。添加2%和5% NHA时，这种增加最为显著。玻璃离子水门汀、羟基磷灰石、纳米颗粒、牙齿修复磨损。
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