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Effect of TiO2 Nanoparticles on Tensile Strength of Dental Acrylic Resins.

Shirkavand S, Moslehifard E - J Dent Res Dent Clin Dent Prospects (2014)

Bottom Line: In addition, the group by 1wt% TiO2 exhibited higher tensile strength with a significant difference compared to other groups.Conclusion.Further increase of TiO2 nanoparticles decreased the tensile strength.

View Article: PubMed Central - HTML - PubMed

Affiliation: Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.

ABSTRACT
Background and aims. Adding further fillers to dental resins may enhance their physical characteristics. The aim of this study was to evaluate the tensile strength of heat-curing acrylic resin reinforced by TiO2nanoparticles added into the resin matrix. Materials and methods. Commercially available TiO2 nanoparticles were obtained and characterized using X-ray diffrac-tion (XRD) and scanning electron microscopy (SEM) to determine their crystalline structure, particle size and morphology. TiO2-acrylic resin nanocomposite was prepared by mixing 0.5, 1 and 2 (wt%) of surface modified TiO2 nanoparticles in an amalgamator providing three groups of samples. Before curing, the obtained paste was packed into steel molds. After cur-ing, the specimens were removed from the molds. The tensile strength test samples were prepared according to ISO 1567. Results. Two crystalline phases were found in TiO2 nanoparticles including: (i) anatase as the major one, and (ii) rutile. The average particle size calculated according to the Scherrer equation was 20.4 nm, showing a normal size distribution. According to SEM images, the nanocomposite with 1wt% TiO2 nanoparticles had a better distribution compared to other groups. In addition, the group by 1wt% TiO2 exhibited higher tensile strength with a significant difference compared to other groups. ANOVA showed significant differences between the contents of TiO2 particles in acrylic resin (F = 22.19; P < 0.001). Conclusion. A considerable increase in tensile strength was observed with titania NPs reinforcement agents in 1wt% by weight. Further increase of TiO2 nanoparticles decreased the tensile strength.

No MeSH data available.


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Mentions: The mean and standard deviation of tensile strength measured for all groups along with ANOVA statistics are shown in Figure 4a and Table 1. According to the results of ANOVA followed by Scheffe’s test summarized in Table 2, there is a significant difference between the group of 1wt% TiO2 and other studied groups.


Effect of TiO2 Nanoparticles on Tensile Strength of Dental Acrylic Resins.

Shirkavand S, Moslehifard E - J Dent Res Dent Clin Dent Prospects (2014)

© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4288908&req=5

Mentions: The mean and standard deviation of tensile strength measured for all groups along with ANOVA statistics are shown in Figure 4a and Table 1. According to the results of ANOVA followed by Scheffe’s test summarized in Table 2, there is a significant difference between the group of 1wt% TiO2 and other studied groups.

Bottom Line: In addition, the group by 1wt% TiO2 exhibited higher tensile strength with a significant difference compared to other groups.Conclusion.Further increase of TiO2 nanoparticles decreased the tensile strength.

View Article: PubMed Central - HTML - PubMed

Affiliation: Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.

ABSTRACT
Background and aims. Adding further fillers to dental resins may enhance their physical characteristics. The aim of this study was to evaluate the tensile strength of heat-curing acrylic resin reinforced by TiO2nanoparticles added into the resin matrix. Materials and methods. Commercially available TiO2 nanoparticles were obtained and characterized using X-ray diffrac-tion (XRD) and scanning electron microscopy (SEM) to determine their crystalline structure, particle size and morphology. TiO2-acrylic resin nanocomposite was prepared by mixing 0.5, 1 and 2 (wt%) of surface modified TiO2 nanoparticles in an amalgamator providing three groups of samples. Before curing, the obtained paste was packed into steel molds. After cur-ing, the specimens were removed from the molds. The tensile strength test samples were prepared according to ISO 1567. Results. Two crystalline phases were found in TiO2 nanoparticles including: (i) anatase as the major one, and (ii) rutile. The average particle size calculated according to the Scherrer equation was 20.4 nm, showing a normal size distribution. According to SEM images, the nanocomposite with 1wt% TiO2 nanoparticles had a better distribution compared to other groups. In addition, the group by 1wt% TiO2 exhibited higher tensile strength with a significant difference compared to other groups. ANOVA showed significant differences between the contents of TiO2 particles in acrylic resin (F = 22.19; P < 0.001). Conclusion. A considerable increase in tensile strength was observed with titania NPs reinforcement agents in 1wt% by weight. Further increase of TiO2 nanoparticles decreased the tensile strength.

No MeSH data available.