Mechanical Behavior of Room Temperature Vulcanized Maxillofacial Silicone Reinforced with Aluminum Oxide Nano Particles Before and after Artificial Accelerated Aging AbdulKareem Ahmed Aj.1, Hamad Thekra I.2 1M. Sc. Student (Prosthodontics Department, College of Dentistry, University of Baghdad, Iraq 2Prof. (Prosthodontics Department, College of Dentistry, University of Baghdad, Iraq) Online published on 27 November, 2019. Abstract Aim of this Study Was to evaluate the effect of addition of Aluminum oxide (Al2O3) Nano fillers on some mechanical properties of VST 50F room temperature vulcanized maxillofacial silicone before and after (100 hours) of the artificial accelerated aging. The Nano Al2O3 was added in a concentrations of 1% and 1.5% by weight to the VST 50F RTV maxillofacial silicone, the samples were tested for tear strength (ISO 34-1), tensile strength and percentage of elongation(ISO 37), shore A hardness and surface roughness(ISO 7619) before and after artificial aging. The scanning electron microscope was used to assess the uniformity of Nano-fillers dispersion within the silicone matrix, while the FTIR was used to analyze the interaction of the Nano Al2O3 with the silicone. The SEM showed a well dispersion of the Nano-Al2O3 within the silicone matrix, there was no interaction between the Nano-Al2O3 and the silicone in the FTIR. The results before artificial aging showed highly significant increase in tear strength, tensile strength, shore A hardness and surface roughness tests, except for the percentage of elongation test that showed a significant decrease for 1% and 1.5% group when compared to the control group. Top Keywords RTV maxillofacial silicone, Nano Al2O3, tear strength, tensile strength, shore A hardness, surface roughness. Top |