Effect of alumina particles loading on the mechanical properties of light-cured dental resin composites |
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| Affiliation: | 1. Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences (TUMS), Ghods Street, Keshavarz Blvd., Tehran, Iran. 14176-14411, Tehran, Iran;2. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box:16765-564, Tehran, Iran;3. University of Basrah College of Dentistry, Basrah, Iraq;1. Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846, Iran;2. Center for Composite, Institute for Vehicle System and Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia |
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| Abstract: | The purpose of this study is to evaluate the effect of alumina (Al2O3) loading on the mechanical properties of dental resin composites (DRCs). The DRCs were prepared based on Al2O3 particles and bisphenol A-glycidyl methacrylate (Bis-GMA) was used as the base monomer. The silane-treated Al2O3 particles were mixed with the resin matrix in proportions of 40, 50, and 60 wt%, respectively. Resin matrix without filler was used as the control sample. The Vickers hardness (HV) and flexural modulus (FM) of the DRCs mixed with Al2O3 particles were found to be superior compared to the control sample; the values increased from 14.4 to 23.5 kg/mm2 and 1.5 to 5.7 GPa, respectively. However, the flexural strength (FS) values of DRCs were slightly decreased as the filler loading increased i.e. from 84.5 to 74.2 MPa. The results also revealed statistically significant increases in the HV and FM. On the other hand, FS values showed significant decrease when filler loading was increased (P < 0.05). |
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| Keywords: | Dental resin composite Filler loading Alumina Mechanical properties |
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