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Journal of Nanomaterials
Volume 2017, Article ID 6171578, 8 pages
https://doi.org/10.1155/2017/6171578
Research Article

Comparative Evaluation of Mechanical Properties of Dental Nanomaterials

1Department of Restorative Dentistry, Ege University Faculty of Dentistry, Izmir, Turkey
2Department of Metallurgy and Materials Engineering, Celal Bayar University Faculty of Engineering, Manisa, Turkey

Correspondence should be addressed to Cem Peskersoy; moc.liamtoh@yosreksepmectd

Received 23 September 2016; Accepted 12 December 2016; Published 7 February 2017

Academic Editor: Ping Xiao

Copyright © 2017 Cem Peskersoy and Osman Culha. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study examines the properties of nanobased dental restorative materials with nanoindentation method in a precise, repeatable, and comparable way. Microhybrid and nanohybrid composites, conventional glass ionomer materials, and light cured nanoionomer materials were utilised for the study. Specimen discs ( mm, 2 mm) were prepared to test the hardness, modulus of elasticity, yield strength, and fracture toughness values for each sample in a nanoindentation device with an atomic force microscopy add-on (). Comparative analyses were performed by one-way ANOVA and post hoc Tukey tests. The hardness and modulus of elasticity values of nanocomposite were higher (2.58 GPa and 32.86 GPa, resp.) than those of other dental materials. Although glass ionomer exhibited a hardness that was similar to a nanoionomer (0.81 versus 0.87 GPa), glass ionomer had the lowest fracture toughness value ( MPa/mm0.5). The mechanical properties of resin composites improve with additional nanoscale fillers, unlike the glass ionomer material.