Microhardness of fiberglass – reinforced photocomposite material under different conditions of light polimerization
| Autor: | Oleh Roman, Oleksandr Udod |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
High intensity lcsh:R Analytical chemistry lcsh:Medicine General Medicine Indentation hardness Light flux світловий потік luminous flux «м’який старт» polymerization мікротвердість полімеризація microhardness зміцнений скловолокном фотокомпозит glass-fiber reinforced photocomposite Irradiation intensity інтенсивність Light exposure |
| Zdroj: | ScienceRise: Medical Science, Vol 0, Iss 4 (37), Pp 40-44 (2020) |
| Popis: | The aim: to study in laboratory conditions the microhardness of a glass-fiber-reinforced photocomposite under different modes of light exposure at different times. Materials and methods. The microhardness of the everX Posterior, GC glass-fiber-reinforced photocomposite was investigated on 60 samples using a PMT-3 microhardness meter on three sample surfaces within 1 hour, 1 day and 7 days after polymerization. Samples of a cylindrical shape with a height of 3 mm of group 1 were irradiated with the light flux of a photopolymerizer in the "soft start" mode, samples of group 2 were polymerized with light of constant high intensity 1400 mW/cm2. Research results. After 1 hour, the microhardness on the surface closest to the LED was 87.34±1.21 kgf/mm2in samples of group 1, 102.0±0.94 kgf/mm2(p2(the lowest indicator) and 90.65±1.12 kgf/mm2(p2, group 2 – to 114.61±1.13 kgf/mm2(p2and 99.83±1.24 kgf/mm2(p2, in 2 – 123.35±1.15 kgf/mm2(p2and 107.53±0.92 kgf/mm2(p Conclusions.The light flux of constant high intensity provides statistically significantly (p |
| Databáze: | OpenAIRE |
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