Pengaruh Jumlah dan Ukuran Nanopartikel Cangkang Telur pada Bahan Gigi Tiruan Cekat Sementara Resin Akrilik Swapolimerisasi terhadap Kekuatan Fleksural dan Ketahanan Fraktur

Abstract

Prosthetic rehabilitation with fixed dentures has the advantages of similar occlusion, patient comfort, and good aesthetics. The use of temporary fixed dentures is around 7-14 days, but in certain conditions, such as the manufacture of implant superstructures or prosthetic rehabilitation after crown lengthening, definitive fixed dentures require a longer time. Self-polymerized acrylic has lower strength compared to heat-cured PMMA or bis-acryl. The gap between human chewing strength and self-polymerized acrylic resin causes fixed dentures to be easily fractured. The urgency of this research is an effort to develop dental materials that not only have clinical benefits but also have economic value and are environmentally friendly. The purpose of this study was to determine the effect of adding eggshell nanoparticles to self-polymerized acrylic resin materials on the flexural strength and fracture resistance of temporary fixed dentures. The stages of this research were to make eggshell nanoparticles with a ball mill for 4 and 8 hours. As many as 5%, 10%, and 15% of eggshell nanoparticles measuring 1-50 nm and 51-100 nm were added to acrylic, then tested for flexural strength and fracture resistance with a universal testing machine, morphology test with a scanning electron microscope, and structure test with X-RD. This type of research is a laboratory experiment with a post-test-only control group design. The results showed that there was a significant effect of the addition of 5% and 10% eggshell nanoparticles to the self-polymerized acrylic resin of temporary fixed dentures on flexural strength and fracture resistance with p <0.05. This study also showed no effect of the size of eggshell nanoparticles 1-50 nm and 51-100 nm in self-polymerized acrylic resin of temporary fixed dentures on flexural strength and fracture resistance with p > 0.05. It can be concluded that adding eggshell nanoparticles to self-polymerized acrylic resin can increase flexural strength and fracture resistance. Flexural strength and fracture resistance in self-polymerized acrylic resin decreased by adding 15% eggshell nanoparticles. This shows that self-polymerized acrylic resin with the addition of 5% and 10% eggshell nanoparticles can be used as a temporary restoration in several cases of fixed dentures that require a long time before the definitive fixed denture is installed, including in cases of crown lengthening dentures and implants.