Journal of Conservative Dentistry
Home About us Editorial Board Instructions Submission Subscribe Advertise Contact e-Alerts Login 
Users Online: 789
Print this page  Email this page Bookmark this page Small font sizeDefault font sizeIncrease font size
Year : 2018  |  Volume : 21  |  Issue : 2  |  Page : 130-135

Effect of incorporation of zinc oxide nanoparticles on mechanical properties of conventional glass ionomer cements

1 Dental Research Center, Dental School, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Preventive Dentistry Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3 Malek-Ashtar University of Technology, Tehran, Iran

Correspondence Address:
Dr. Saeed Safa
Department of Physic, Malek-Ashtar University, Lavizan, Tehran
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JCD.JCD_170_17

Rights and Permissions

Aim: The aim of this study is to investigate the physical properties of conventional and resin-modified glass ionomer cements (GICs) compared to GICs supplemented with zinc oxide (ZnO) nanofiller particles at 5% (w/w). Methods: In this in vitro study, ZnO nanoparticles of different morphologies (nanospherical, nanorod, and nanoflower) were incorporated to glass ionomer powder. The samples were subjected to the flexural strength (n = 20) and surface hardness test (n = 12) using a universal testing machine and a Vickers hardness machine, respectively. Surface analysis and crystal structure of samples were performed with scanning electron microscope and X-radiation diffraction, respectively. The data were analyzed using one-way ANOVA, Shapiro–Wilk, and Tukey's tests (P < 0.05). Results: Flexural strength of glass ionomer containing nanoparticles was not significantly different from the control group (P > 0.05). The surface hardness of the glass ionomer containing nanospherical or nanoflower ZnO was significantly lower than the control group (P < 0.05). However, the surface hardness of glass ionomer containing nanorod ZnO was not significantly different from the control group (P = 0.868). Conclusions: Incorporation of nanospherical and nanoflower ZnO to glass ionomer decreased their surface hardness, without any changes on their flexural strength. Incorporation of nanorod ZnO particles caused no effect on the mechanical properties.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded221    
    Comments [Add]    

Recommend this journal