纳米粒子增强 PMMA 义齿基托材料的半透明性：一项体外对比研究。
Translucency of nanoparticle-reinforced PMMA denture base material: An in-vitro comparative study.
机构信息
Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University.
Department of Removable Prosthodontics, Faculty of Dental Medicine, Al-Azhar University.
出版信息
Dent Mater J. 2021 Jul 31;40(4):972-978. doi: 10.4012/dmj.2020-296. Epub 2021 Apr 22.
The aim of this study was to assess the translucency of denture base acrylic resin reinforced with zirconium dioxide (ZrONPs), silicon dioxide (SiONPs), and diamond (DNPs) nanoparticles. A total of 130 heat-polymerized acrylic discs (15×2.5 mm) were fabricated conventionally and divided into control and experimental groups according to nanoparticle type and concentration (0.5, 1, 1.5, and 2.5 wt%). Unmodified acrylic resin specimens served as control. All specimens were thermocycled (5,000 cycles). Translucency was measured using a spectrophotometer. ANOVA and post-hoc Turkeys' test were used for data analysis at α=0.05. The translucency of modified PMMA was significantly lower than control (p<0.05) except 0.5% ZrONPs and SiONPs (p>0.05) which exhibited the highest translucency values among modified groups. As the NPs concentration increased, the translucency decreased and the lowest value was seen with 2.5% DNPs (1.18±0.10). The addition of ZrONPs, SiONPs, and DNPs into denture base resin decreased the translucency.
本研究旨在评估添加氧化锆（ZrONPs）、二氧化硅（SiONPs）和金刚石（DNPs）纳米颗粒的义齿基托树脂的透光率。共制备了 130 个热聚合丙烯酸盘（15×2.5mm），根据纳米颗粒类型和浓度（0.5、1、1.5 和 2.5wt%）分为对照组和实验组。未改性的丙烯酸树脂试件作为对照组。所有试件均经过热循环（5000 次）。使用分光光度计测量透光率。采用方差分析和事后 Tukey 检验进行数据分析，α=0.05。除 0.5%ZrONPs 和 SiONPs 外（p>0.05），改性 PMMA 的透光率明显低于对照组（p<0.05），后者表现出改性组中最高的透光率。随着纳米颗粒浓度的增加，透光率降低，2.5%DNPs 的透光率最低（1.18±0.10）。ZrONPs、SiONPs 和 DNPs 添加到义齿基托树脂中降低了透光率。
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