Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Sep 8;14(18):3767.
doi: 10.3390/polym14183767.

Influence of Incorporating 5% Weight Titanium Oxide Nanoparticles on Flexural Strength, Micro-Hardness, Surface Roughness and Water Sorption of Dental Self-Cured Acrylic Resin

Rasha M Abdelraouf  1 , Rania E Bayoumi  2 , Tamer M Hamdy  3
Affiliations

Influence of Incorporating 5% Weight Titanium Oxide Nanoparticles on Flexural Strength, Micro-Hardness, Surface Roughness and Water Sorption of Dental Self-Cured Acrylic Resin

Rasha M Abdelraouf et al. Polymers (Basel). .

Abstract

Background: Polymethyl methacrylate (PMMA) is used in fabricating acrylic denture bases. Repairing a fractured acrylic denture base can be done by self-cured PMMA, yet this is still a weak point after repair. The aim of this study was to evaluate the effect of incorporating 5% weight titanium oxide nanoparticles (TiO2) to self-cured PMMA on flexural strength, surface micro-hardness, roughness, and water sorption.

Methods: A total of 160 acrylic-resin specimens were used in this study. They were divided in two main groups; (a) control group, prepared by mixing self-cured PMMA powder to its liquid monomer, (b) treated group, prepared by blending 5% weight TiO2 nanoparticles to self-cured PMMA powder then this blend was mixed with the liquid monomer. Flexure strength, surface micro-hardness, roughness, and water sorption were evaluated. Data were analyzed using independent sample t-tests (p ≤ 0.05).

Results: There was a significant increase in the flexural strength of PMMA of the treated group after the addition of TiO2 (137.6 MPa) compared with the control (75.4 MPa) (p ≤ 0.001). No significant difference between the two groups in terms of micro-hardness (p = 0.385) and surface roughness (p = 0.269). Water sorption showed a significant reduction in the treated group (p ≤ 0.001).

Conclusions: Addition of 5% weight TiO2 nanoparticles to the self-cured acrylic resin improved its flexural strength and reduced its water-sorption without impairing the surface micro-hardness and roughness.

Keywords: flexural strength; micro-hardness; polymethyl methacrylate (PMMA); self-cure acrylic resin; surface roughness; titanium oxide nanoparticles; water sorption.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Representative 3-D surface roughness images (Ra) (a) control group; (b) Treated group.
Figure 2
Figure 2
Representative SEM micrographs (200× magnification) (a) control group; (b) Treated group.
Figure 3
Figure 3
Representative SEM micrographs (500× magnification) (a) control group; (b) Treated group.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Abdelraouf R.M. Chemical analysis and microstructure examination of extended-pour alginate impression versus conventional one (characterization of dental extended-pour alginate) Int. J. Polym. Mater. Polym. Biomater. 2018;67:612–618. doi: 10.1080/00914037.2017.1362636. - DOI
    1. Abdelraouf R.M., Bayoumi R.E., Hamdy T.M. Effect of powder/water ratio variation on viscosity, tear strength and detail reproduction of dental alginate impression material (In vitro and clinical study) Polymers. 2021;13:2923. doi: 10.3390/polym13172923. - DOI - PMC - PubMed
    1. Abdelraouf R.M., Mohammed M., Abdelgawad F. Evaluation of shear-bond-strength of dental self-adhering flowable resin-composite versus total-etch one to enamel and dentin surfaces: An in-vitro study. Open Access Maced. J. Med. Sci. 2019;7:2162–2166. doi: 10.3889/oamjms.2019.579. - DOI - PMC - PubMed
    1. Hadi A.F., Jassim M.M., HA M. Evaluating some Mechanical and Physical Properties of Vertex Thermosens Denture base Material in Comparison with Heat Cure Acrylicdenture Base Material. Int. J. Sci. Res. 2017;6:394–397. doi: 10.21275/ART20172925. - DOI
    1. Hamouda I.M. Retention of Probase Hot Versus the Conventional Heat-Cured Acrylic Resin Denture Bases. Biomed. J. Sci. Tech. Res. 2017;1:906–911. doi: 10.26717/BJSTR.2017.01.000329. - DOI

LinkOut - more resources