Wear resistance of nano silica modified acrylic denture teeth and nano filled composite denture teeth

Abstract

Artificial denture teeth are subjected to wear from daily masticatory functions. This wearaffects the denture esthetics, functions and in turn results in patient discomfort. The purpose ofthis study was to evaluate the wear resistance of nano composite fabricated artificial denture teethand conventional acrylic denture teeth reinforced with silica nano particles. A total number of60 samples were used. Samples were divided into equal four groups (n=15). The first group wasfabricated from nano filled composite. The second and third groups were silica nanoparticlesmodified acrylic denture teeth with two different concentrations 0.1% and 10% respectively. Thefourth group was conventional acrylic resin denture teeth and served as a control. The 2-bodywear testing was performed with a multi-modal ROBOTA chewing simulator. Wear was thenevaluated by the means of weight loss and surface roughness. The nano-composite group recordedsignificantly higher wear resistance than conventional and silica modified acrylic resin groups. Thesilica modified acrylic resin group with 0.1% concentration recorded a lower surface roughnessthan any of the other groups. In conclusion; Nano-composite teeth can be used as artificial dentureteeth exhibiting significant higher wear resistance than conventional and silica modified artificialacrylic teeth.