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Enhancing glass ionomer cement features by using the HA/YSZ nanocomposite: A feed forward neural network modelling

Rajabzadeh, G ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jmbbm.2013.07.025
  3. Abstract:
  4. Despite brilliant properties of glass ionomer cement (GIC), its weak mechanical property poses an obstacle for its use in medical applications. The present research aims to formulate hydroxyapatite/yttria-stabilized zirconia (HA/YSZ) in the composition of GIC to enhance mechanical properties and to improve fluoride release of GIC. HA/YSZ was synthesized via a sol-gel method and characterized by applying X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photo-emission spectroscopy (XPS) and simultaneous thermal analysis (STA) along with transmission electron microscopy (TEM) methods. The synthesized nanocomposite was mixed with GIC at a fixed composition of 5. wt%. The effect of different weight percentages of YSZ:HA on GIC was investigated by measuring the compressive strength, diametral tensile strength, microhardness and fluoride release. The results showed that, after 1 and 7 days of setting, the 20. wt% nanohydroxyapatite/80. wt% stabilized zirconia cement exhibited higher compressive strength (1857-245. MPa), higher diametral tensile strength (11-14. MPa) and greater microhardness (104-106. MPa) as compared with the pure GIC (65-88. MPa in compressive strength, 5-9.5. MPa in diametral tensile strength and 70-89. MPa in microhardness). The reinforced cement, also, exhibited higher fluoride release compared with pure GIC. The artificial neural network (ANN) was trained for modeling the system. Results obtained by ANN have proved to be completely in accordance with expectations
  5. Keywords:
  6. Dental cements ; Diametral tensile and compressive strength ; Feed forward neural network ; Fluoride release ; HA/YSZ nanocomposite ; Diametral tensile strength ; Fourier transform infra red (FTIR) spectroscopy ; GIC ; Glass ionomer cement ; Nano-hydroxyapatite ; Simultaneous thermal analysis ; Xray photo-emission spectroscopy (XPS) ; Cements ; Compressive strength ; Dental cement ; Fourier transform infrared spectroscopy ; Glass ; Mechanical properties ; Medical applications ; Microhardness ; Nanocomposites ; Neural networks ; Photoelectron spectroscopy ; Sol-gel process ; Thermoanalysis ; Transmission electron microscopy ; X ray diffraction ; Zirconia ; Intercalation ; Cement ; Fluoride ; Glass ionomer ; Hydroxyapatite ; Retinol ; Yttrium ; Zirconium oxide ; Artificial neural network ; Biomechanics ; Controlled study ; Electron microscopy ; Flame photometry ; Hardness ; Infrared spectroscopy
  7. Source: Journal of the Mechanical Behavior of Biomedical Materials ; Vol. 29 , January , 2014 , pp. 317-327 ; ISSN: 17516161
  8. URL: http://www.sciencedirect.com./science/article/pii/S1751616113002580