Effectiveness of customized master cone on apical sealing in various apical size of prepared root canals

Hye-Young Hong; Ho-Young Choi; Gi-Woon Choi

doi:10.5395/JKACD.2002.27.1.066

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Original Article Effectiveness of customized master cone on apical sealing in various apical size of prepared root canals: Hye-Young Hong, Ho-Young Choi, Gi-Woon Choi; Journal of Korean Academy of Conservative Dentistry 2002;27(1):66-76.
DOI: https://doi.org/10.5395/JKACD.2002.27.1.066
Published online: January 31, 2002

Department of Conservative Dentistry, College of Dentistry, KyungHee University, Korea.

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Abstract
REFERENCES

Abstract

The purpose of this study is to evaluate the effectiveness of customized master cone on apical sealing in various apical size of prepared root canals, that is MAF(Master Apical File) and to know at which apical size the apical leakage is to be significantly reduced using customized master cone.

120 extracted single rooted premolars were divided into four groups according to their apical size(MAF), #30, 40, 50 and 60. And then, each group was subdivided into three in accordance with three obturation methods, lateral condensation with standardized master cone, lateral condensation with chloroform-dipped customized master cone, and continuous wave of obturation technique.

Resorcinol-formaldehyde resin was used for the microleakage test of this study. Teeth were sectioned horizontally at 1.5mm(Level 1), 2.5mm(Level 2), and 3.5mm(Level 3) from the anatomical root apex using low speed microtome. All sections were examined under ×40 magnification with a stereomicroscope, photographed, and then scanned. With the scanned images, resin-infiltrated area presenting the microleakage was calculated using SigmaScan/Image, and the ratio of leakage to the total root canal area of each group was analyzed statistically(one way ANOVA).

The results were as follows;

1. In groups of MAF #30, there was no significant difference of mean leakage ratio among three obturation methods at all three levels.

2. In groups of MAF #40, the group using lateral condensation with customized master cone had the lowest mean leakage ratio at all three levels, but there was no significant difference among three obturation techniques.

3. In groups of MAF #50, the mean leakage ratio of the group using lateral condensation with standard master cone was the highest among those of three obturation techniques at level 1, and this difference was statistically significant(p<0.05).

4. In groups of MAF #60, the groups using lateral condensation with standard master cone had also the highest mean leakage ratio at all levels, but there was no significant difference at level 1 and 2. At level 3, the leakage of the group using lateral condensation with standard master cone was significantly higher than that of the group using continuous wave of obturation(p<0.05).

The results of this study suggested that the obturation method using customized master cone or the continuous wave of obturation is more effective for apical sealing than that using standardized master cone when MAF is larger than #50.

REFERENCES

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Fig. 1

Mean leakage ratio(%) at 3 Levels (MAF #30)

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Fig. 2

Mean leakage ratio(%) at 3 Levels (MAF #40)

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Fig. 3

Mean leakage ratio(%) at 3 Levels (MAF #50)

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Fig. 4

Mean leakage ratio(%) at 3 Levels (MAF #60)

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Fig. 5

Representative photograph of the group using lateral condensation with standard master cone at MAF #30, Level 1 (×40).

Fig. 6

Representative photograph of the group using lateral condensation with customized master cone at MAF #30, Level 1 (×40).

Fig. 7

Representative photograph of the group using continuous wave of obturation at MAF #30, Level 1 (× 40).

Fig. 8

Representative photograph of the group using lateral condensation with standard master cone at MAF #40, Level 1 (×40).

Fig. 9

Representative photograph of the group using lateral condensation with customized master cone at MAF #40, Level 1 (×40).

Fig. 10

Representative photograph of the group using continuous wave of obturation at MAF #40, Level 1 (× 40).

Fig. 11

Representative photograph of the group using lateral condensation with standard master cone at MAF #50, Level 1 (×40).

Fig. 12

Representative photograph of the group using lateral condensation with master cone at MAF #50, Level 1 (×40).

Fig. 13

Representative photograph of the group using continuous wave of obturation at MAF #50, Level 1 (× 40).

Fig. 14

Representative photograph of the group using lateral condensation with standard master cone at MAF #60, Level 1 (×40).

Fig. 15

Representative photograph of the group using lateral condensation with customized master cone at MAF #60, Level 1 (×40).

Fig. 16

Representative photograph of the group using continuous wave of obturation at MAF #60, Level 1 (× 40).

Table 1

Classification of Experimental Groups

^*MAF;Master Apical File

Table 2

Mean leakage ratio (%) at 3 Levels

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Level 1: 1.5mm from the apex, Level 2: 2.5mm from the apex, Level 3: 3.5mm from the apex

Table 3

Statistical analysis of mean leakage ratio(%) in experimental groups

^*statistically significant at P<0.05

Table 4

Statistical analysis of mean leakage ratio(%) between groups:Newman-Keuls multiple comparisons test

^*statistically significant at P<0.05

ND; no statistical difference

Tables & Figures

REFERENCES

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Effectiveness of customized master cone on apical sealing in various apical size of prepared root canals

J Korean Acad Conserv Dent. 2002;27(1):66-76. Published online January 31, 2002

DOI: https://doi.org/10.5395/JKACD.2002.27.1.066

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Figure

Effectiveness of customized master cone on apical sealing in various apical size of prepared root canals

Fig. 1 Mean leakage ratio(%) at 3 Levels (MAF #30) A: Lateral condensation with standard master cone B: Lateral condensation with customized master cone C: Continuous wave of obturation

Fig. 2 Mean leakage ratio(%) at 3 Levels (MAF #40) A: Lateral condensation with standard master cone B: Lateral condensation with customized master cone C: Continuous wave of obturation

Fig. 3 Mean leakage ratio(%) at 3 Levels (MAF #50) A: Lateral condensation with standard master cone B: Lateral condensation with customized master cone C: Continuous wave of obturation

Fig. 4 Mean leakage ratio(%) at 3 Levels (MAF #60) A: Lateral condensation with standard master cone B: Lateral condensation with customized master cone C: Continuous wave of obturation

Fig. 5 Representative photograph of the group using lateral condensation with standard master cone at MAF #30, Level 1 (×40).

Fig. 6 Representative photograph of the group using lateral condensation with customized master cone at MAF #30, Level 1 (×40).

Fig. 7 Representative photograph of the group using continuous wave of obturation at MAF #30, Level 1 (× 40).

Fig. 8 Representative photograph of the group using lateral condensation with standard master cone at MAF #40, Level 1 (×40).

Fig. 9 Representative photograph of the group using lateral condensation with customized master cone at MAF #40, Level 1 (×40).

Fig. 10 Representative photograph of the group using continuous wave of obturation at MAF #40, Level 1 (× 40).

Fig. 11 Representative photograph of the group using lateral condensation with standard master cone at MAF #50, Level 1 (×40).

Fig. 12 Representative photograph of the group using lateral condensation with master cone at MAF #50, Level 1 (×40).

Fig. 13 Representative photograph of the group using continuous wave of obturation at MAF #50, Level 1 (× 40).

Fig. 14 Representative photograph of the group using lateral condensation with standard master cone at MAF #60, Level 1 (×40).

Fig. 15 Representative photograph of the group using lateral condensation with customized master cone at MAF #60, Level 1 (×40).

Fig. 16 Representative photograph of the group using continuous wave of obturation at MAF #60, Level 1 (× 40).

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Effectiveness of customized master cone on apical sealing in various apical size of prepared root canals

Table 1

Classification of Experimental Groups

^*MAF;Master Apical File

Table 2

Mean leakage ratio (%) at 3 Levels

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Level 1: 1.5mm from the apex, Level 2: 2.5mm from the apex, Level 3: 3.5mm from the apex

Table 3

Statistical analysis of mean leakage ratio(%) in experimental groups

^*statistically significant at P<0.05

Table 4

Statistical analysis of mean leakage ratio(%) between groups:Newman-Keuls multiple comparisons test

^*statistically significant at P<0.05

ND; no statistical difference

Table 1 Classification of Experimental Groups

^*MAF;Master Apical File

Table 2 Mean leakage ratio (%) at 3 Levels

A: Lateral condensation with standard master cone

B: Lateral condensation with customized master cone

C: Continuous wave of obturation

Level 1: 1.5mm from the apex, Level 2: 2.5mm from the apex, Level 3: 3.5mm from the apex

Table 3 Statistical analysis of mean leakage ratio(%) in experimental groups

^*statistically significant at P<0.05

Table 4 Statistical analysis of mean leakage ratio(%) between groups:Newman-Keuls multiple comparisons test