Effect of plate-like glass fillers on the mechanical properties of dental nanocomposites

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• 作者：Mojdeh Mohseni ; Mohammad Atai ; Alireza Sabet ; Saeed Beigi
• 关键词：Dental composites ; Mechanical properties ; Filler morphology ; Glass flake
• 刊名：Iranian Polymer Journal
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：25
• 期：2
• 页码：129-134
• 全文大小：1,119 KB
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• 作者单位：Mojdeh Mohseni (1)
  Mohammad Atai (2)
  Alireza Sabet (2)
  Saeed Beigi (2)
  
  1. Department of Biomaterials, Science and Research Branch, Islamic Azad University, Tehran, Iran
  2. Iran Polymer and Petrochemical Institute (IPPI), P. O. Box 14965/115, Tehran, Iran
  
• 刊物主题：Polymer Sciences; Ceramics, Glass, Composites, Natural Methods;
• 出版者：Springer Berlin Heidelberg
• ISSN：1735-5265

文摘

In this study, glass flakes were incorporated into the spherical nanosilica component of the dental composites and its effect on the mechanical properties of these composites was investigated. To achieve a good interfacial adhesion between matrix resin and fillers, the particles were surface treated with a silane coupling agent (γ-MPS). Composites with different plate-like and spherical nanoparticle contents were prepared and their mechanical properties, including flexural strength, flexural modulus and fracture toughness were measured. The morphology of the particles and fracture surface of the composites were studied by SEM. The distribution of the flakes in the composite was also monitored using EDXA. Statistical analysis of the data was performed with ANOVA and the Tukey’s post hoc test was at a significance level of 0.05. The results showed that the flexural modulus and fracture toughness of specimens were improved with increasing the glass flake content up to 15 vol % which then declined upon further increase due to the stacking of the flakes on each other. A good interfacial adhesion was observed between matrix resin and particles in the SEM micrographs. The results of this study suggest that incorporation of glass flakes into the dental composites containing spherical nanosilica particles may enhance their mechanical properties. Keywords Dental composites Mechanical properties Filler morphology Glass flake