Toras FM, Hamouda IM (2017) Effect of Nano Filler on Microhardness, Diametral Tensile Strength and Compressive Strength of Nano-Filled Glass Ionomer. Int J Dentistry Oral Sci. 4(2), 413-417. 413 OPEN ACCESS http://scidoc.org/IJDOS.php Effect of Nano Filler on Microhardness, Diametral Tensile Strength and Compressive Strength of Nano-Filled Glass Ionomer Research Article Toras FM 1 , Hamouda IM 2,3* 1 Student, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia. 2 Professor of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. 3 Head of Conservative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia. International Journal of Dentistry and Oral Science (IJDOS) ISSN: 2377-8075 Introduction In seventies, amalgam was used commonly as direct restoration, while ceramic and gold were used as indirect restoration. Recent studies have limit the use of amalgam for many reasons like the potentiality of toxicity and aesthetic matter. Nowadays, compos- ite and glass ionomer are the main tooth-colored restoration used for direct restoration providing less allergic reaction or toxicity and great appearance [1, 2]. Many years ago, there was an obvious development and great modifcations in dental materials generally and in glass ionomer specifcally. Glass ionomer restorative materials were introduced in the seventies, modifcations and improvements were done. Clin- ical advantages of glass-ionomers include fuoride release, ability to adhere to moist enamel and dentin and radiopacity. Glass iono- *Corresponding Author: Ibrahim Mohamed Hamouda, Head of Conservative Dentistry, Faculty of Dentistry, Umm Al-Qura University, Makkah, Saudi Arabia. Tel: +966542812148 Fax: 0020502260173 E-mail: imh100@hotmail.com Received: January 15, 2017 Accepted: February 07, 2017 Published: February 08, 2017 Citation: Toras FM, Hamouda IM (2017) Effect of Nano Filler on Microhardness, Diametral Tensile Strength and Compressive Strength of Nano-Filled Glass Ionomer. Int J Dentistry Oral Sci. 4(2), 413-417. doi: http://dx.doi.org/10.19070/2377-8075-1700082 Copyright: Hamouda IM © 2017. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distri- bution and reproduction in any medium, provided the original author and source are credited. Abstract Aim: This study was designed to evaluate the microhardness, diametral tensile strength and compressive strength of a nano-flled glass ionomer restorative material in comparison with a resin modifed and conventional glass ionomers. Materials and Methods: A total of 45 specimens were prepared from three types of glass ionomer restorative materials. Specimens were cured with a light curing unit according to the manufacturer’s instructions. The speci- mens were prepared using Tefon split molds with dimensions of 6 mm height and 4 mm diameter. Incremental curing in 3 layers, 2mm each were used. After curing, all specimens were immersed in distilled water for 24 hours. Microhardness test was done using a Vickers microhardness Tester with 25 gf load for 5 sec. Diametral tensile strength and compressive strength were measured using Intestron testing machine at cross-head speed of 50 gm/ sec until fracture. Results: There was a signifcant difference among the tested materials in all testing parameters. Ketac fl Aplicap exhibited the highest hardness value while Glass carbomer fl GCP has the lowest value while GC Fuji II LC showed intermediate micro-hardness value. GC Fuji II LC exhibited the highest diametral tensile and compres- sive strength values while Ketac Fil Plus Aplicap has the lowest values. Glass Carbomer Fil, GCP showed inter- mediate diametral tensile and compressive strength values. Conclusions: The nano-flled glass ionomer (Glass Carbomer Fil, GCP) exhibited the lowest hardness value, intermediate diametral tensile and compressive strength values. Keywords: Glass Ionomer; Restorative Material; Nanoflled; Resin-Modifed; Microhardness; Tensile Strength and Compressive Strength.