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In this paper, the influences of additive aluminum oxide and hydroxyapatite nanoparticles on the mechanical and strength properties of PMMA (including flexural strength, impact strength, surface hardness and shrinkage behavior) is studied experimentally. | An experimental investigation of HA AL2O3 nanoparticles on mechanical properties of restoration materials Engineering Solid Mechanics 2 2014 173-182 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm An experimental investigation of HA AL2O3 nanoparticles on mechanical properties of restoration materials Majid Safarabadia Nabi Mehri Khansarib and Abbas Rezaeic a School of Mechanical Engineering College of Engineering University of Tehran Tehran Iran b Department of Aerospace Engineering Faculty of New Sciences and Technologies University of Tehran Tehran Iran c Department of Mechanical Engineering University of Maragheh Tabriz Iran ARTICLE INFO ABSTRACT Article history Nano composite materials based on polymers are widely used in restoration martials like dental. Received January 20 2014 Poly methyl methacrylate PMMA is one of the most used polymers as dental material. Received in Revised form PMMA has disadvantages such as low flexural strength properties and impact strength. In this April 10 2014 paper the influences of additive aluminum oxide and hydroxyapatite nanoparticles on the Accepted 27 April 2014 Available online mechanical and strength properties of PMMA including flexural strength impact strength 29 April 2014 surface hardness and shrinkage behavior is studied experimentally. For this purpose nine Keywords standard mechanical testing samples of pure PMMA PMMA 5HA and PMMA 10HA with Polymethyl methacrylate various amounts of Nano aluminum oxide 3 6 8 wt. were prepared. The results showed that Hydroxyapatite the mechanical properties of hybrid Nano-composites were significantly improved in Aluminum oxide comparison with the pure samples in a way that optimal Nano-composite with convenience Mechanical properties flexural properties and impact strength is obtained. Moreover the use of nanoparticles results in Hybrid Nano-composite shrinkage reduction of hybrid Nano-composites in comparison with pure
