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Research Article
Effect of CQ-amine ratio on the degree of conversion in resin monomers with binary and ternary photoinitiation systems
Ho-Jin Moon, Dong-Hoon Shin
Restor Dent Endod 2012;37(2):96-102.   Published online May 18, 2012
DOI: https://doi.org/10.5395/rde.2012.37.2.96
AbstractAbstract PDFPubReaderePub
Objectives

This study evaluated the effect of camphorquinone (CQ)-amine ratio on the C=C double bond conversion of resins with binary and ternary photoinitiation systems.

Materials and Methods

Two monomer mixtures (37.5 Bis-GMA/37.5 Bis-EMA/25 TEGDMA) with binary systems (CQ/DMAEMA in weight ratio, group A [0.5/1.0] and B [1.0/0.5]) and four mixtures with ternary system (CQ/OPPI/DMAEMA, group C [0.1/1.0/0.1], D [0.1/1.0/0.2], E [0.2/1.0/0.1] and F [0.2/1.0/0.2]) were tested: 1 : 2 or 2 : 1 CQ-amine ratio in binary system, while 1 : 1 ratio was added in ternary system. The monomer mixture was cured for 5, 20, 40, and 300 sec with a Demetron 400 curing unit (Demetron). After each exposure time, degree of conversion (DC) was estimated using Fourier transform infrared (FTIR) spectrophotometer (Nicolet 520, Nicolet Instrument Corp.). The results were analyzed by ANOVA followed by Scheffe test, with p = 0.05 as the level of significance.

Results

DC (%) was expressed in the order of curing time (5, 20, 40, and 300 sec). Group A (14.63 ± 10.42, 25.23 ± 6.32, 51.62 ± 2.69, 68.52 ± 2.77); Group B (4.04 ± 6.23, 16.56 ± 3.38, 37.95 ± 2.79, 64.48 ± 1.21); Group C (16.87 ± 5.72, 55.47 ± 2.75, 60.83 ± 2.07, 68.32 ± 3.31); Group D (23.77 ± 1.64, 61.05 ± 1.82, 65.13 ± 2.09, 71.87 ± 1.17); Group E (28.66 ± 2.92, 56.68 ± 1.33, 60.66 ± 1.17, 68.78 ± 1.30); Group F (39.74 ± 6.31, 61.07 ± 2.58, 64.22 ± 2.29, 69.94 ± 2.15).

Conclusion

All the monomers with ternary photoinitiation system showed higher DC than the ones with binary system, until 40 sec. Concerning about the effect of CQ-amine ratio on the DC, group A converted into polymer more than group B in binary system. However, there was no significant difference among groups with ternary system, except group C when cured for 5 sec only.

Citations

Citations to this article as recorded by  
  • The power of light – From dental materials processing to diagnostics and therapeutics
    Mohammed A. Hadis, Adrian C. Shortall, William M. Palin
    Biomaterial Investigations in Dentistry.2024; : 1.     CrossRef
  • Mechanical Properties of Experimental Composites with Different Photoinitiator
    Luis Felipe Marques de Resende, Anderson Catelan, Kusai Baroudi, Alan Rodrigo Muniz Palialol, Alexandre Marques de Resende, Ana Carolina Andreucci, Rayssa Ferreira Zanatta, Priscila Christiane Suzy Liporoni
    European Journal of Dentistry.2022; 16(01): 167.     CrossRef
  • Long-term bonding efficacy of adhesives containing benzodioxioles as alternative co-initiators
    Giana da Silveira LIMA, Andressa Goicochea MOREIRA, Carine Tais Welter MEEREIS, Ginia Brito LIMA, Fernanda Barbosa LEAL, Rafael Ratto de MORAES, Fabrício A OGLIARI, Cesar Liberato PETZHOLD, Evandro PIVA
    Brazilian Oral Research.2018;[Epub]     CrossRef
  • Piperonyl methacrylate: Copolymerizable coinitiator for adhesive compositions
    Andressa Goicochea Moreira, Carlos Enrique Cuevas-Suárez, Wellington Luiz de Oliveira da Rosa, Aline Oliveira Ogliari, Cesar Liberato Petzhold, Evandro Piva, Fabrício Aulo Ogliari, Giana da Silveira Lima
    Journal of Dentistry.2018; 79: 31.     CrossRef
  • Kinetics of bulk photo-initiated copper(i)-catalyzed azide–alkyne cycloaddition (CuAAC) polymerizations
    Han Byul Song, Austin Baranek, Christopher N. Bowman
    Polymer Chemistry.2016; 7(3): 603.     CrossRef
  • 1,3-Butadiene as an Adhesion Promoter Between Composite Resin and Dental Ceramic in a Dielectric Barrier Discharge Jet
    Geum-Jun Han, Sung-No Chung, Bae-Hyeock Chun, Chang-Keun Kim, Kyu Hwan Oh, Byeong-Hoon Cho
    Plasma Chemistry and Plasma Processing.2013; 33(2): 539.     CrossRef
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  • 6 Crossref
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Original Article
Microleakage of the experimental composite resin with three component photoinitiator systems
Ji-Hoon Kim, Dong-Hoon Shin
J Korean Acad Conserv Dent 2009;34(4):333-339.   Published online July 31, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.4.333
AbstractAbstract PDFPubReaderePub

This study was done to determine if there is any difference in microleakage between experimental composite resins, in which various proportions of three component photoinitiators (Camphoroquinone, OPPI, Amine) were included.

Four kinds of experimental composite resin were made by mixing 3.2% silanated barium glass (78 wt.%, average size; 1 µm) with each monomer system including variously proportioned photoinitiator systems used for photoinitiating BisGMA/BisEMA/TEGDMA monomer blend (37.5:37.5:25 wt.%). The weight percentage of each component were as follows (in sequence Camphoroquinone, OPPI, Amine): Group A - 0.5%, 0%, 1% / Group B - 2%, 0.2%, 2% / Group C - 0.2%, 1%, 0.2% / Group D - 1%, 1%, 2%.

Each composite resin was used as a filling material for round class V cavities (diameter: 2/3 of mesiodistal width; depth: 1.5 mm) made on extracted human premolars and they were polymerized using curing light unit (XL 2500, 3M ESPE) for 40 s with an intensity of 600 mW/cm2. Teeth were thermocycled five-hundred times between 50℃ and 550℃ for 30s at each temperature.

Electrical conductivity (µA) was recorded two times (just after thermocycling and after three-month storage in saline solution) by electrochemical method.

Microleakage scores of each group according to evaluation time were as follows [Group: at first record / at second record; unit (µA)]: A: 3.80 (0.69) / 13.22 (4.48), B: 3.42 (1.33) / 18.84 (5.53), C: 4.18 (2.55) / 28.08 (7.75), D: 4.12 (1.86) / 7.41 (3.41).

Just after thermocycling, there was no difference in microleakage between groups, however, group C showed the largest score after three-month storage. Although there seems to be no difference in microleakage between groups just after thermocycling, composite resin with highly concentrated initiation system or classical design (Camphoroquinone and Amine system) would be more desirable for minimizing microleakage after three-month storage.

Citations

Citations to this article as recorded by  
  • Comparison of polymerization shrinkage of dual-cure core build-up resin according to shade and curing mode
    Yoorina Choi, Karl Lee, Hoon-Sang Chang
    Oral Biology Research.2019; 43(4): 243.     CrossRef
  • Optimal combination of 3-component photoinitiation system to increase the degree of conversion of resin monomers
    Chang-Gyu Kim, Ho-Jin Moon, Dong-Hoon Shin
    Journal of Korean Academy of Conservative Dentistry.2011; 36(4): 313.     CrossRef
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  • 2 Crossref
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