The effect of 4,4 '-bis(N,N-diethylamino)benzophenone on the degree of conversion in liquid photopolymer for dental 3D printing

Du-Hyeong Lee; Hang Nga Mai; Jin-Chul Yang; Tae-Yub Kwon

doi:10.4047/jap.2015.7.5.386

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The effect of 4,4 '-bis(N,N-diethylamino)benzophenone on the degree of conversion in liquid photopolymer for dental 3D printing

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The effect of 4,4 '-bis(N,N-diethylamino)benzophenone on the degree of conversion in liquid photopolymer for dental 3D printing

Du-Hyeong Lee, Hang Nga Mai, Jin-Chul Yang and Tae-Yub Kwon

The journal of advanced prosthodontics, Vol.7(5), pp.386-391

10/01/2015

DOI: 10.4047/jap.2015.7.5.386

PMCID: PMC4644780

PMID: 26576255

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Abstract

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 (camphorquinoneamine) 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, 05 mm x 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/cm(2)) 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 (alpha=.05). RESULTS. In the DEABP-containing resin, the DC values were significantly higher at all points in time (P<.001), and also the initial polymerization velocity was faster than in the DEABP-free resin. CONCLUSION. The addition of DEABP significantly enhanced the DC values and, thus, could potentially become an efficient photoinitiator when combined with a camphorquinone amine system and may be utilized as a more advanced photopolymerization system for dental 3D printing.

Dentistry, Oral Surgery & Medicine

Life Sciences & Biomedicine

Science & Technology

Details

Title: Subtitle: The effect of 4,4 '-bis(N,N-diethylamino)benzophenone on the degree of conversion in liquid photopolymer for dental 3D printing
Creators: Du-Hyeong Lee - Kyungpook Natl Univ, Sch Dent, Dept Prosthodont, Daegu 41940, South Korea
Hang Nga Mai - Kyungpook Natl Univ, Sch Dent, Dept Prosthodont, Daegu 41940, South Korea
Jin-Chul Yang - Kyungpook National University
Tae-Yub Kwon - Kyungpook Natl Univ, Sch Dent, Dept Dent Biomat, Daegu 41940, South Korea
Resource Type: Journal article
Publication Details: The journal of advanced prosthodontics, Vol.7(5), pp.386-391
DOI: 10.4047/jap.2015.7.5.386
PMID: 26576255
PMCID: PMC4644780
NLM abbreviation: J Adv Prosthodont
ISSN: 2005-7806
eISSN: 2005-7814
Publisher: Korean Acad Prosthodontics
Number of pages: 6
Grant note: NRF-2014R1A1A1006073 / Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning
Language: English
Date published: 10/01/2015
Academic Unit: Prosthodontics
Record Identifier: 9984914145902771

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