The effect of TiO₂ and SiO₂ nanoparticles on flexural strength of poly (methyl methacrylate) acrylic resins

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• 作者：Ahmad Sodagar ; DDS ; MSC^a ; Abbas Bahador ; PhD^b ; Safia Khalil ; DDS^c ; Atefe Saffar Shahroudi ; DDS^a ; ^{at.sa.sh@gmail.com} ; Mohammad Zaman Kassaee ; PhD^d
• 关键词：TiO2 ; SiO2 ; Nanoparticles ; Acrylic resins ; Flexural strength
• 刊名：Journal of Prosthodontic Research
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：57
• 期：1
• 页码：15-19
• 全文大小：372 K

文摘

Purpose

TiO₂ and SiO₂ nanoparticles are products of nanotechnology which have been incorporated to acrylic resins (AR) in order to induce antimicrobial properties. However, as additives they can affect the mechanical properties of the final product. The aim of this study was to survey the effects of TiO₂ and SiO₂ nanoparticles on flexural strength (Fs) of poly (methyl methacrylate) acrylic resins.

Methods

Acrylic specimens (Selecta Plus) in size of 5 ¡Á 10 (¡À0.2) ¡Á 3.3 (¡À0.2) mm were prepared and divided into 7 groups: AR containing nanoTiO₂, SiO₂ and TiO₂ with SiO₂ in two concentration of 1 % and 0.5 % , in addition to a control group. To prepare nano AR, nanoparticles were added to the monomer. All specimens were stored in 37 ¡ãC distilled water and underwent Fs test by universal testing machine (Zwick).

Results

The maximum mean flexural strength (43.5 MPa) belongs to the control group and AR containing 0.5 % of both TiO₂ and SiO₂ demonstrated the minimum mean Fs (30.1 MPa). Resins contained TiO₂, demonstrated lower values of Fs than those contained SiO₂ with the same concentration, but the differences were not significant (P > 0.05).

Conclusion

Incorporation of TiO₂ and SiO₂ nanoparticles into acrylic resins can adversely affect the flexural strength of the final products, and this effect is directly correlated with the concentration of nanoparticles.