The effect of fillers on mechanical, physical and thermal properties of silicone for application in extraoral prosthesis

Oral cancer and other head and neck cancers can cause significant facial defects due to extensive surgical resections, which impair function and aesthetics, necessitating the use of custom-made extraoral prosthetics to restore appearance and functionality, improve quality of life, and address psychological impacts. Silicone, widely used for extraoral prostheses, deteriorates rapidly in Malaysia's hot and humid climate, reducing its lifespan. This study highlights the need for enhanced silicone materials with improved mechanical and thermal properties to increase prosthesis longevity and effectiveness, addressing both physical and psychological challenges faced by individuals with facial disfigurements. Purpose: This study investigates the mechanical, physical, and thermal properties of modified DC-L15 and DC-L20 room temperature vulcanised (RTV) silicones with titanium dioxide, calcium carbonate, and zinc oxide fillers at different percentage. It aims to characterize filler distribution, evaluate their effects, and analyse tear propagation.