氧化锌纳米颗粒对聚甲基丙烯酸甲酯义齿基托树脂弯曲强度的影响。
Effect of zinc oxide nanoparticles on the flexural strength of polymethylmethacrylate denture base resin.
作者信息
Vikram Santhanam, Chander N Gopi
机构信息
SRM Dental College, Department of Prosthodontics, Ramapuram Chennai, India.
SRM Dental College, Ramapuram, Department of Prosthodontics, Chennai,India.
出版信息
Eur Oral Res. 2020 Jan 1;54(1):31-35. doi: 10.26650/eor.20200063.
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.
目的
本研究评估了添加不同浓度氧化锌（ZnO）纳米颗粒的聚甲基丙烯酸甲酯（PMMA）的抗弯强度。
材料与方法
将纳米ZnO以0%、0.4%、0.6%、0.8%、1.2%和1.4%的比例添加到PMMA义齿基托材料中。按照ISO 20795-1-2013制作60个尺寸为10mm×4mm×80mm的热固化聚合丙烯酸树脂试件。试件分为6组。丙烯酸试件按照制造商的说明进行加工。进行三点弯曲试验以评估抗弯强度。用扫描电子显微镜（SEM）进行表面分析，以观察试件的断裂表面。采用方差分析和Tukey检验进行统计分析（p<0.05）。
结果
统计分析显示各组之间的强度存在显著差异。添加ZnO纳米颗粒后抗弯强度有所提高。在nZn-14组观察到最高平均值（91.31MPa），在对照组nZn-0中最低（61.36MPa）。方差分析和Tukey的诚实显著性检验发现各组之间存在统计学显著差异（p<0.001）。
结论
与对照组相比，添加所有浓度的ZnO纳米颗粒均提高了丙烯酸树脂的抗弯强度。
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