The effect of silica nano particle derived from natural rice on surface roughness and wettability of high impact heat cure resin

Background: Poly (methyl-methacrylate) (PMMA) is considered the most popular current denture material; its principal material for the fabrication of denture base has relatively poor physical mechanical properties. Several nanofillers have been added to address this problem. Objectives: The aim of the current study was to investigate the incorporating of rice husk-derived silica particles into high impact heat cure acrylic resin to improve its physical properties. Materials and Methods: According to the results of the pilot study, high impact heat cure resin was mixed with 1% and 3% (by weight) of silica particles which derived from a natural rice husk source. The study’s samples were divided into two main groups (n = 10 samples for each group) based on the tests that were done. Each group was then divided into three smaller groups, (0% control, 1%, and 3%) depending on the amount of natural silica particles added (n = 10 samples for each subgroup). Results: The results showed that adding 3% silica particles derived from natural rice husk increased the roughness and wettability values significantly (P < 0.01), whereas adding 1% silica particles decreased the roughness and contact angle values significantly (P < 0.01) compared to the control group (0 wt.%). Conclusion: The incorporation of 1 wt.% and 3 wt.% silica nanoparticles derived from rice husk was found to enhance the surface roughness and wettability of high impact acrylic resin. With 1 wt.% and 3 wt.% rice husk derived silica produced the best outcomes.