Objectives: The current study was intended to evaluate addition of different concentrations of strontium titanate nanoparticles to denture base materials regarding: surface roughness, impact strength, water sorption and solubility.
Methods: Polyamide and heat-cured acrylic resin were used and both were modified with strontium titanate with these concentrations: 0 wt%, 0.5wt%, 1wt%, 1.5wt%. Surface roughness, impact strength, water sorption and solubility were evaluated for all specimens. Data were statistically analyzed.
Results: The findings of this study showed that for surface roughness, the highest value was for flexible resin with 1.5 wt% while the lowest value was for heat cured acrylic resin with 0 wt %, for impact strength, the highest value was for flexible resin with 1.5 wt% while the lowest value was for heat cured acrylic resin with 0 wt %, for water sorption and solubility, the highest value was for heat cured acrylic resin with 0 wt %, while the lowest value was for flexible resin with 1.5 wt%.
Conclusions: Strontium titanate nanoparticles have increased surface roughness of both resins as the concentration increase. For impact strength, water sorption and solubility, strontium titanate nanoparticles gives better effect with both polyamide and heat cured acrylic resin as the concentration increase, leading to increased impact strength, while decreased water sorption and solubility. Polyamide has higher surface roughness than heat cured acrylic resin. Polyamide has higher impact strength than heat cured acrylic resin. Polyamide has lower water sorption and solubility than heat cured acrylic resin.