Effect of zinc oxide nanoparticles on the flexural strength of polymethylmethacrylate denture base resin.

IF 0.9 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

European Oral Research Pub Date : 2020-01-01 DOI:10.26650/eor.20200063

Santhanam Vikram, N Gopi Chander

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引用次数: 16

Abstract

Purpose: This study evaluated the flexural strength of polymethyl methacrylate (PMMA) reinforced with various concentrations of zinc oxide (Zn O) nanoparticles.

Materials and methods: Nano ZnO was added in 0, 0.4, 0.6, 0.8, 1.2 and 1.4 percentage to PMMA denture base material. 60 specimens of heat cure polymerizing acrylic resin of dimensions 10mm x 4mm x 80mm were fabricated in accordance to ISO 20795-1-2013. The specimens were divided into 6 groups. Acrylic specimens were processed according to manufacturer's instruction. Three-point bending test was performed to evaluate the flexural strength. Surface analysis was performed with scanning electron microscopy (SEM) to observe the fracture surfaces of specimens. ANOVA and Tukey tests were used for the statistical analysis (p < 0.05).

Results: Statistical analysis revealed significant differences in strength between groups. The flexural strength improved with the addition ZnO nanoparticles. Highest mean value was observed in Group nZn -14 (91.31 MPa) and lowest in control Group nZn-0 (61.36 MPa). ANOVA and Tukey's honestly significance test found statistical significant differences among the groups ( p<0.001).

Conclusion: The addition of ZnO nanoparticles in all concentrations increased the flexural strength of acrylic resin when compared to the control group.

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氧化锌纳米颗粒对聚甲基丙烯酸甲酯义齿基托树脂抗弯强度的影响。

目的:本研究评估不同浓度氧化锌纳米颗粒增强聚甲基丙烯酸甲酯(PMMA)的抗弯强度。材料与方法:在PMMA义齿基托材料中分别添加0、0.4、0.6、0.8、1.2、1.4 %的纳米ZnO。根据ISO 20795-1-2013，制作了60个尺寸为10mm x 4mm x 80mm的热固化聚合丙烯酸树脂样品。将标本分为6组。亚克力试样按厂家说明书进行加工。采用三点弯曲试验对其抗弯强度进行评价。采用扫描电镜(SEM)对试样断口进行表面分析。采用ANOVA和Tukey检验进行统计学分析(p < 0.05)。结果:经统计学分析，两组间强度差异有统计学意义。ZnO纳米粒子的加入提高了材料的抗弯强度。平均值nZn -14组最高(91.31 MPa)，对照组最低(61.36 MPa)。ANOVA和Tukey’s honest显著性检验发现各组间差异有统计学意义(p)。结论:与对照组相比，添加不同浓度的ZnO纳米粒子均能提高丙烯酸树脂的抗弯强度。

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