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HOME > Restor Dent Endod > Volume 32(4); 2007 > Article
Original Article Microleakage of composite resin restoration according to the number of thermocycling
Chang-Youn Kim, Dong-Hoon Shin
2007;32(4):-384.
DOI: https://doi.org/10.5395/JKACD.2007.32.4.377
Published online: July 31, 2007

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Corresponding Author: Dong-Hoon Shin. Department of Conservative Dentistry, College of Dentistry, Dankook University, 7-1 Shinbu-dong, Cheonan, Chungnam, 330-716, Korea. Tel: 82-41-550-1965, Fax: 82-41-550-1963, donyshin@dankook.ac.kr
• Received: June 12, 2007   • Revised: June 27, 2007   • Accepted: June 28, 2007

Copyright © 2007 Korean Academy of Conservative Dentistry

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  • Present tooth bonding system can be categorized into total etching bonding system (TE) and self-etching boding system (SE) based on their way of smear layer treatment. The purposes of this study were to compare the effectiveness between these two systems and to evaluate the effect of number of themocycling on microleakage of class V composite resin restorations.
    Total forty class V cavities were prepared on the single-rooted bovine teeth and were randomly divided into four experimental groups: two kinds of bonding system and another two kinds of thermocycling groups. Half of the cavities were filled with Z250 follwing the use of TE system, Single Bond and another twenty cavities were filled with Metafil and AQ Bond, SE system. All composite restoratives were cured using light curing unit (XL2500, 3M ESPE, St. Paul, MN, USA) for 40 seconds with a light intensity of 600 mW/cm2.
    Teeth were stored in distilled water for one day at room temperature and were finished and polished with Sof-Lex system. Half of teeth were thermocycled 500 times and the other half were thermocycled 5,000 times between 5℃ and 55℃ for 30 second at each temperature.
    Teeth were isolated with two layers of nail varnish except the restoration surface and 1 mm surrounding margins. Electrical conductivity (µA) was recorded in distilled water by electrochemical method. Microleakage scores were compared and analyzed using two-way ANOVA at 95% level.
    From this study, following results were obtained: There was no interaction between variables of bonding system and number of thermocycling (p = 0.485). Microleakage was not affected by the number of thermocycling either (p = 0.814). However, Composite restoration of Metafil and AQ Bond, SE bond system showed less microleakage than composite restoration of Z250 and Single Bond, TE bond system (p = 0.005).
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Figure 1
Schematic drawing of electrochemical test.
jkacd-32-377-g001.jpg
Table 1
Component of dentin bonding systems
jkacd-32-377-i001.jpg
Table 2
Currents from electrochemical test (µA)

Different letters means statistically significant differences (p < 0.05)

jkacd-32-377-i002.jpg
Table 3
Two-way ANOVA result
jkacd-32-377-i003.jpg
Table 4
Currents between restoratives (µA)

Different letters means statistically significant differences (p < 0.05)

jkacd-32-377-i004.jpg

Tables & Figures

REFERENCES

    Citations

    Citations to this article as recorded by  
    • Evaluation of Shear Bond Strength and Microleakage of Bulk-fill Resin Composites
      Hanbyeol Lee, Hyunwoo Seo, Juhyun Lee, Howon Park
      THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY.2015; 42(4): 281.     CrossRef
    • Effect of Er:YAG lasing on the dentin bonding strength of two-step adhesives
      Byeong-Choon Song, Young-Gon Cho, Myung-Seon Lee
      Journal of Korean Academy of Conservative Dentistry.2011; 36(5): 409.     CrossRef
    • Microleakage of the experimental composite resin with three component photoinitiator systems
      Ji-Hoon Kim, Dong-Hoon Shin
      Journal of Korean Academy of Conservative Dentistry.2009; 34(4): 333.     CrossRef

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      Microleakage of composite resin restoration according to the number of thermocycling
      J Korean Acad Conserv Dent. 2007;32(4):377-384.   Published online July 31, 2007
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    Figure
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    Microleakage of composite resin restoration according to the number of thermocycling
    Image
    Figure 1 Schematic drawing of electrochemical test.
    Microleakage of composite resin restoration according to the number of thermocycling

    Component of dentin bonding systems

    Currents from electrochemical test (µA)

    Different letters means statistically significant differences (p < 0.05)

    Two-way ANOVA result

    Currents between restoratives (µA)

    Different letters means statistically significant differences (p < 0.05)

    Table 1 Component of dentin bonding systems

    Table 2 Currents from electrochemical test (µA)

    Different letters means statistically significant differences (p < 0.05)

    Table 3 Two-way ANOVA result

    Table 4 Currents between restoratives (µA)

    Different letters means statistically significant differences (p < 0.05)


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