Analysis of the Anaerobic Conversion Efficiency of Various Group Composite Material

Tooth restoration involves the use of various types of materials. In modern reality, light-curing composite materials are used for this purpose. Also, polymer cements of various types of polymerization are used to fix indirect structures in highly aesthetic areas. All dental composites are polymerized according to the free radical type. The formation of free radicals and curing occur as a result of a thermal, chemical, or photochemical reaction. Polymerization of composites never occurs at 100%; upon contact with air, the surface of the material interacts with oxygen, which leads to the termination (inhibition) of the polymerization reaction. To prevent the formation of an oxy-geninhibited layer (OIL) on the surface of the composite, chemically inert, oxygen-impermeable protective glycerol gels are used. To evaluate the feasibility and effectiveness of glycerol in preventing the oxygen-inhibited layer formation and to determine the relationship between the group of the composite and its qualitative composition during the formation of an oxygen-inhibited layer during polymerization. This study was carried out using an Infralum FT-801 IR Fourier spectrometer in KBr tablets. 135 samples of 12 various composite materials were studied; each was subjected to IR spectrometry, cured in glycerol or without glycerol. 15 specimens of Enamel plus UE composite material underwent pre-polymerization heat in a special oven (Micerium; Avegno, Italy) to 55°C before one heating cycle. The obtained results allowed us to conclude that the type of composite material does not significantly affect the process of oxygen inhibited layer formation. Regardless of the composite material group, under aerobic conditions, an incomplete conversion occurs, and an oxygen inhibited layer is formed. Anaerobic conditions do the conversion completely, which leads to the absence of oil, which was confirmed by infrared spectroscopy data. © (2023), (University of Dicle). All Rights Reserved.