چكيده به لاتين
Abstract: In the current research, the initial composition (2.64 SiO2, 1.16 Al2O3, 0.4 TiO2, 1.7 CaO, 3.4 Na2O, 9.10 K2O, and 0.5 Li2O) was melted at 1500 degrees Celsius, and the crystallization behavior of the resulting ferrite was analyzed through simultaneous thermal analysis (STA) and X-ray diffraction (XRD). Subsequent to examining the crystallization behavior and ensuring the amorphousness of the ferrite, tempering operations were carried out within the temperature range of 590 to 790 degrees Celsius after forming with a press. X-ray diffraction analysis (XRD) was then conducted on the samples to check for crystallization. Following assessments of linear shrinkage, water absorption, and apparent porosity percentages, the temperature of 730 degrees Celsius was chosen for further processing. To introduce porosity, ethyl cellulose, in powder form and dissolved in methanol at different percentages, was employed. After examining the microstructure using a light microscope, a 30% ethyl cellulose solution was selected for creating finer and more uniform porosity. X-ray diffraction analysis confirmed the disappearance of the lucite phase in the glass system at 730 degrees Celsius without additives. Initially, the lucite phase was synthesized at this temperature, and subsequently, with a certain percentage along with homogeneous glass and by adding a 30% ethyl cellulose press solution, heat treatment was conducted at 730 degrees Celsius. Due to insufficient strength, the heat treatment temperature was increased to 930 degrees Celsius. For polymer penetration, the porous glass-ceramic block was impregnated with 3-(trimethoxysilyl) propyl methacrylate bonding agent. The polymer solution containing UDMA, Bis-GMA, and TEGDMA monomers in a ratio of 3:3 to 4, along with 0.1% TPO and BPO initiators, was then applied to the porous block. Initial setting was achieved using UV light, followed by final baking in a flat vacuum oven at a temperature of 80 degrees Celsius. The mechanical, microstructural, and color spectrum properties of the samples were investigated. The bending strength of lucite ceramic glass and composite was found to be 58.95 and 33.03 MPa, respectively, with Vickers hardness values of 1.7 and 6.6 GPa. Fracture toughness was calculated using the Nihara method as 1 and 1.12 MPa.m1.2, and color brightness values of 77.03 and 84.04 were obtained for the samples. Keywords: dental composite, penetration, dental polymer, lucite glass ceramic
