The effect of 4,4'-bis(N,N-diethylamino) benzophenone on the degree of conversion in liquid photopolymer for dental 3D printing
| Autor: | Hang-Nga Mai, Tae-Yub Kwon, Du-Hyeong Lee, Jin Chul Yang |
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| Rok vydání: | 2015 |
| Předmět: |
Degree of conversion
4 4'-bis(N N-diethylamino)benzophenone Bisphenol A Materials science Analytical chemistry Nanotechnology Photopolymer Photointiator 3D Printing chemistry.chemical_compound Polymerization chemistry Benzophenone Dentistry (miscellaneous) Original Article Irradiation Oral Surgery Fourier transform infrared spectroscopy Spectroscopy Photoinitiator |
| Zdroj: | The Journal of Advanced Prosthodontics |
| ISSN: | 2005-7806 |
| Popis: | PURPOSE The purpose of this preliminary study was to investigate the effects of adding 4,4'-bis(N,N-diethylamino) benzophenone (DEABP) as a co-initiator to a binary photoinitiating system (camphorquinone-amine) to analyze on the degree of conversion (DC) of a light-cured resin for dental 3D printing. MATERIALS AND METHODS Cylindrical specimens (N=60, n=30 per group, ø5 mm × 1 mm) were fabricated using bisphenol A glycerolate dimethacrylate (BisGMA) both with and without DEABP. The freshly mixed resins were exposed to light in a custom-made closed chamber with nine light-emitting diode lamps (wavelength: 405 nm; power: 840 mW/cm2) for polymerization at each incidence of light-irradiation at 10, 30, 60, 180, and 300 seconds, while five specimens at a time were evaluated at each given irradiation point. Fourier-transform infrared (FTIR) spectroscopy was used to measure the DC values of the resins. Two-way analysis of variance and the Duncan post hoc test were used to analyze statistically significant differences between the groups and given times (α=.05). RESULTS In the DEABP-containing resin, the DC values were significantly higher at all points in time (P |
| Databáze: | OpenAIRE |
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