Köroğlu Ayşegül, Şahin Onur, Kürkçüoğlu Işın, Dede Doğu Ömür, Özdemir Tonguç, Hazer Baki
- Bülent Ecevit University, Faculty of Dentistry, Department of Prosthodontics, Zonguldak, Turkey.
- Süleyman Demirel University, Faculty of Dentistry, Department of Prosthodontics, Isparta, Turkey.
J Appl Oral Sci. 2016 Nov-Dec;24(6):590-596. doi: 10.1590/1678-775720160185.
The aim of the present study was to evaluate the mechanical and thermal characteristics of two denture base acrylic resins containing silver nanoparticles (AgNPs).
Two different acrylic denture base resins (heat-polymerized and microwave polymerized) containing 0.3, 0.8 and 1.6 wt% AgNPs were evaluated for flexural strength, elastic modulus and impact strength. The glass transition temperature (Tg) and relative heat capacity (Cp) of the samples were determined from the Differential Scanning Calorimetry (DSC) results. For statistical analysis, two-way ANOVA and Tukey-HSD tests were performed.
Addition of 0.8% and 1.6% AgNPs in microwave-polymerized resin significantly decreased the transverse strength and elastic modulus. In terms of impact strength, the addition of AgNPs has no effect on both resin groups. Glass transition temperature (Tg) was decreased with the addition of AgNPs for both denture base resins.
The incorporation of AgNPs, generally used for antimicrobial efficiency, affected the transverse strength of the denture base acrylic resins depending on the concentration of nanoparticles. Tg was decreased with the addition of AgNPs for both denture base resins.
本研究旨在评估两种含银纳米颗粒（AgNPs）的义齿基托丙烯酸树脂的机械和热性能。
对两种不同的含0.3%、0.8%和1.6%（重量）AgNPs的丙烯酸义齿基托树脂（热聚合和微波聚合）进行弯曲强度、弹性模量和冲击强度评估。根据差示扫描量热法（DSC）结果测定样品的玻璃化转变温度（Tg）和相对热容量（Cp）。进行统计学分析时，采用双向方差分析和Tukey-HSD检验。
在微波聚合树脂中添加0.8%和1.6%的AgNPs会显著降低横向强度和弹性模量。就冲击强度而言，添加AgNPs对两种树脂组均无影响。两种义齿基托树脂添加AgNPs后玻璃化转变温度（Tg）均降低。
通常用于抗菌效能的AgNPs的加入，根据纳米颗粒的浓度影响义齿基托丙烯酸树脂的横向强度。两种义齿基托树脂添加AgNPs后Tg均降低。
