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Evaluation of microleakage with retrograde filling materials in blood contamination using fluid transport model
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Original Article Evaluation of microleakage with retrograde filling materials in blood contamination using fluid transport model
Hyo-Soon Ahn, In-Ho Jang, Se-Joon Lee, Kwang-Won Lee
Journal of Korean Academy of Conservative Dentistry 2002;27(1):24-33.
DOI: https://doi.org/10.5395/JKACD.2002.27.1.024
Published online: January 31, 2002

Department of Conservative Dentistry & Institute for Oral Bioscience, College of Dentistry, Chonbuk National University, Korea.

Copyright © 2002 Korean Academy of Conservative Dentistry

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  • Leakage studies have been performed frequently, since a fluid-tight seal provided by various dental filling materials has been considered clinically important. The leakage of the various root-end filling materials has been widely investigated mostly dye penetration method. These dye studies cannot offer any information about the quality of the seal of a test material over a long period of time The purpose of this study was to evaluate the microleakage of root end cavities in blood contamination filled amalgam, intermediate restorative material(IRM), light cured glass ionomer cement(GI) and mineral trioxide aggregate(MTA) by means of a modified fluid transport model. Fifty standard human root sections, each 5mm high and with a central pulp lumen of 3mm in diameter, were and filled with our commonly used or potential root end filling materials after they were contaminated with blood. At 24h, 72h, 1, 2, 4, 8, and 12 weeks after filling, leakage along these filling materials was determined under a low pressure of 10KPa(0.1atm) using a fluid transport model.
    The results were as follows:
    1. MTA group showed a tendency of decreasing percent of gross leakage (20ml/day) in process of time, whereas the other materials showed a tendency of increasing in the process time.
    2. At the all time interval, GI group leaked significantly less than amalgam group and IRM group (p<0.05).
    3. At the 4 weeks, the percentage of gross leakage in MTA group decreased to 0% thereafter, the low percentage of gross leakage was maintained in MTA group until the end of the experiment, whereas the percentage in IRM group increased to 100%.
    4. At the 12 weeks, percentage of gross leakage was significantly low in MTA group(0%), comparison with GI group(40%), amalgam group(90%) and IRM group(100%), but there was no significant difference between latter two materials.
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Fig. 1
Schematic diagram of fluid transport device
jkacd-27-24-g001.jpg
Fig. 2
Percentage of Gross leakage (F > 20)
jkacd-27-24-g002.jpg
Fig. 3
A SEM photograph of Am (×3,000)
jkacd-27-24-g003.jpg
Fig. 4
A SEM photograph of GI (×3,000)
jkacd-27-24-g004.jpg
Fig. 5
A SEM photograph of IRM (×3,000)
jkacd-27-24-g005.jpg
Fig. 6
A SEM photograph of MTA (×3,000)
jkacd-27-24-g006.jpg
Table 1
Classification of groups
jkacd-27-24-i001.jpg
Table 2
Result of fluid transport (F:µl/day)
jkacd-27-24-i002.jpg
Table 3
Multiple comparison by Mann-Whitney rank sum test
jkacd-27-24-i003.jpg

Tables & Figures

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        Evaluation of microleakage with retrograde filling materials in blood contamination using fluid transport model
        J Korean Acad Conserv Dent. 2002;27(1):24-33.   Published online January 31, 2002
        DOI: https://doi.org/10.5395/JKACD.2002.27.1.024
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      Evaluation of microleakage with retrograde filling materials in blood contamination using fluid transport model
      Image Image Image Image Image Image
      Fig. 1 Schematic diagram of fluid transport device
      Fig. 2 Percentage of Gross leakage (F > 20)
      Fig. 3 A SEM photograph of Am (×3,000)
      Fig. 4 A SEM photograph of GI (×3,000)
      Fig. 5 A SEM photograph of IRM (×3,000)
      Fig. 6 A SEM photograph of MTA (×3,000)

      Fig. 1

      Fig. 2

      Fig. 3

      Fig. 4

      Fig. 5

      Fig. 6

      Evaluation of microleakage with retrograde filling materials in blood contamination using fluid transport model

      Classification of groups

      Result of fluid transport (F:µl/day)

      Multiple comparison by Mann-Whitney rank sum test
      Table 1 Classification of groups

      Table 2 Result of fluid transport (F:µl/day)

      Table 3 Multiple comparison by Mann-Whitney rank sum test

      Table 1

      Table 2

      Table 3

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