Pembuatan dan Analisis Resin Komposit Sebagai Bahan Tambal Gigi Berbasis Urethane Dimethacrylate (UDMA) dan Triethylene Glycol Dimethacrylate (TEG-DMA) dengan Fotoinisiator Comphorquinone (CQ) dan Trimethylbenzoyl Phosphine Oxide (TPO)

Abstract

In this work, urethane dimethacrylate (UDMA) was used as dental resin as an non-toxic alternative to Bisphenol A-glycidyl methacrylate (Bis-GMA). Additionally, UDMA combine with triethylene glycol dimethacrylate (TEGDMA) monomer with various concentration ratio, meanwhile camphorquinone (CQ) and diphenyl-(2,4,6-trimethylbenzoyl) phosphine (TPO) as photoinitiator. First, UDMA:TEGDMA solution with ratio of 40:60, 50:50, 60:40, 70:30 and 80:20 (wt. %) was prepared. Second, the solution was ultrasonic for 15 min with introduction of CQ and TPO (1:2 wt. %). Third, irradiation of UV LED with wavelength of 375 nm for 2 min to initiate polymerization reaction of monomers. Scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR), thermogravimetric analyzer (TGA) and mechanical properties were used to investigate the morphology, chemical bonding of polymerization reaction, water absorption, solubility rate, shrinkage, decomposition temperature, tensile strength and bending modulus. Based on our findings, we found that that UDMA:TEGDMA ratio of 50:50 wt% demonstrates uniform and smooth surface, degree of convertion (DoC) of 65%, water sorbtion of 0,290 μg/mm3, solubility of 0,038 μg/mm3, shrinkage 0,263 %, fleksural strength of 210 MPa dan modulus of 4,63 GPa, wich is promising for dental resin.