Microleakage of the class V cavity according to restoration site and cavity size using SEM and three-dimensional reconstruction techniques

In-Seo Yang; Dong-Hoon Shin

doi:10.5395/JKACD.2005.30.2.112

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Original Article Microleakage of the class V cavity according to restoration site and cavity size using SEM and three-dimensional reconstruction techniques: In-Seo Yang, Dong-Hoon Shin; Journal of Korean Academy of Conservative Dentistry 2005;30(2):112-120.
DOI: https://doi.org/10.5395/JKACD.2005.30.2.112
Published online: March 31, 2005

Department of Conservative Dentistry, School of Dentistry, Dankook University, Korea.

Corresponding author: Dong-Hoon Shin. Department of Conservative Dentistry, School of Dentistry, Dankook University, San 7-1, Shinbu Dong, Cheonan, Chungnam, Korea, 330-714. Tel : 82-41-550-1965, Fax : 82-41-550-1963, donyshin@dankook.ac.kr

• Received: August 19, 2004 • Revised: November 10, 2004 • Accepted: November 23, 2004

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Abstract
REFERENCES

Abstract

This study was done to evaluate whether there were any differences in microleakage of class V composite restorations according to restoration site and cavity size.

Total sixty-four restorations were made in molar teeth using Esthet-X. Small (2 × 2 × 1.5 mm) and large (4 × 2 × 1.5 mm) restorations were made at the buccal/lingual surface and the proximal surface each. After 1,000 times of thermocycling (5℃ - 55℃), resin replica was made and the percentage of marginal gap to the whole periphery of the restoration was estimated from SEM evaluation.

Thermocycled tooth was dye penetrated with 50% silver nitrate solution. After imbedding in an auto-curing resin, it was serially ground with a thickness of 0.25 mm. Volumetric microleakage was estimated after reconstructing three dimensionally.

Two-way ANOVA and independent T-test for dye volume, Mann-Whitney U test for the percentage of marginal gap, Spearman's rho test for the relationship between two techniques were used.

The results were as follows:

1. The site and size of the restoration affected on the microleakage of restoration. Namely, much more leakage was seen in the proximal and the large restorations rather than the buccal/lingual and the small restorations.

2. Close relationship was found between two techniques (Correlation coefficient = 0.614 / P = 0.000).

Within the limits of this study, it was noted that proximal and the large restorations leaked more than buccal/lingual and the small restorations. Therefore, it should be strictly recommended large exposure of margins should be avoided by reducing unnecessary tooth reduction.
Keywords: Microleakage; Restoration site; Cavity size; Three-dimensional reconstruction; SEM

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Figure 1

Occlusal view of three-dimensionally reconstructed image (Green : restoration, Red : dye)

Figure 2

Calculation of marginal gap: Percentage of marginal gap to cavity perimeter (SEM image ; × 35)

(Blue line : cavity perimeter, Red line : area with marginal gap)

Figure 3

Internal view of three-dimensionally reconstructed images of experimental groups

(Green : restoration, Red : dye)

Table 1

Experimental groups

Table 2

Amount of dye penetration (cubic voxels)

Table 3

Two-way ANOVA analysis (dye penetration)

^*indicates significance at the 0.05 level

^**indicates significance at the 0.01 level

Table 4

Significance between restoration surface (dye penetration)

^**indicates significance at the 0.01 level

Table 5

Significance between cavity size (dye penetration)

^*indicates significance at the 0.05 level

Table 6

Percentage of marginal gap (%)

Table 7

Correlation between dye penetration and percentage of marginal gap

^**indicates significance at the 0.01 level

Tables & Figures

REFERENCES

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Microleakage of the class V cavity according to restoration site and cavity size using SEM and three-dimensional reconstruction techniques

J Korean Acad Conserv Dent. 2005;30(2):112-120. Published online March 31, 2005

DOI: https://doi.org/10.5395/JKACD.2005.30.2.112

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Figure

Microleakage of the class V cavity according to restoration site and cavity size using SEM and three-dimensional reconstruction techniques

Figure 1 Occlusal view of three-dimensionally reconstructed image (Green : restoration, Red : dye)

Figure 2 Calculation of marginal gap: Percentage of marginal gap to cavity perimeter (SEM image ; × 35) (Blue line : cavity perimeter, Red line : area with marginal gap)

Figure 3 Internal view of three-dimensionally reconstructed images of experimental groups (Green : restoration, Red : dye)

Figure 1

Figure 2

Figure 3

Microleakage of the class V cavity according to restoration site and cavity size using SEM and three-dimensional reconstruction techniques

Table 1

Experimental groups

Table 2

Amount of dye penetration (cubic voxels)

Table 3

Two-way ANOVA analysis (dye penetration)

^*indicates significance at the 0.05 level

^**indicates significance at the 0.01 level

Table 4

Significance between restoration surface (dye penetration)

^**indicates significance at the 0.01 level

Table 5

Significance between cavity size (dye penetration)

^*indicates significance at the 0.05 level

Table 6

Percentage of marginal gap (%)

Table 7

Correlation between dye penetration and percentage of marginal gap

^**indicates significance at the 0.01 level

Table 1 Experimental groups

Table 2 Amount of dye penetration (cubic voxels)

Table 3 Two-way ANOVA analysis (dye penetration)

^*indicates significance at the 0.05 level

^**indicates significance at the 0.01 level

Table 4 Significance between restoration surface (dye penetration)

^**indicates significance at the 0.01 level

Table 5 Significance between cavity size (dye penetration)

^*indicates significance at the 0.05 level

Table 6 Percentage of marginal gap (%)

Table 7 Correlation between dye penetration and percentage of marginal gap

^**indicates significance at the 0.01 level