@Article{, title={Aging Effect on the Surface Roughness and Color Stability of VST-06 Maxillofacial Silicone}, author={Nebras Fadhil Alwan and Mohammed Abdul Hussein Hamid and Saja Ali Muhsin}, journal={Journal of Oral and Dental Research مجلة طب الفم والاسنان}, volume={9}, number={1}, pages={10-19}, year={2022}, abstract={Background Silicone elastomer is used commonly for the construction of maxillofacial prostheses. However, it is possessing inferior physical and mechanical properties alongside clinical longevity of the prostheses; rough silicone material may lead to several problems like bacterial accumulation, tissue irritation to the surrounding soft tissue, and even lead to some micro-sites propagation into mechanical failure, color deterioration of the maxillofacial prostheses is the most common cause ofits reconstruction. Objectives This study aim to investigate the role of the accelerated weathering on the surface roughness and color wave change of the VST-06 silicone elastomer.Materials and Methods 10 silicone specimens were prepared at room temperature vulcanization (RTV) VST-06. They were tested before being subjected to an accelerated artificial weathering period (at the baseline), then after being exposed to 46, 146 and 317h of artificial weathering. The surface roughness was measured using TR-200 and the color change measured using the color-ometer device. Statistical One-Way ANOVA test used to analyze the results, the significant confidence was set to p ≤ 0.05.Results ANOVA showed that the values of surface roughness were different among the tested periods (p ≤ 0,05). The lowest surface roughness value is represented after 317h accelerated weathering of 0.10μm, while the highest value was at the initial baseline 3.95μm. As well as the (red, green, and Blue) wave color values were decreased over time of accelerated weathering with the lowest value that represented after 146h of accelerated weathering. Conclusion Within this study limitation, it was concluded that the lowest surface roughness was noticed as the aging period increased, and the color deterioration was initiated after 46h of accelerated weathering, but it increased directly in proportional to accelerated aging.

} }