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The influence of IRM temporary restorations on marginal microleakage of dentin adhesives


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The influence of IRM temporary restorations on marginal microleakage of dentin adhesives

Article information

Restor Dent Endod. 2003;28(1):1-10
Publication date (electronic) : 2003 January 31
doi : https://doi.org/10.5395/JKACD.2003.28.1.001
Young-Gon Cho, Hyun-Kyung Kim, Young-Gon Lee
Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.
Corresponding author (ygcho@mail.chosun.ac.kr)

Abstract

This study investigated the influence of IRM on marginal microleakage of 5th generation adhesives. Class V cavities with gingival margins in dentin were prepared on both buccal and lingual surfaces of 60 extracted human molar teeth. Prepared teeth were randomly divided into six groups. Group 1 and 4 received no temporary restoration with IRM. Group 2 and 5 were covered with IRM mixed at P/L ratio(10g/1g). Group 3 and 6 were covered with IRM mixed at P/L ratio(10g/2g). The temporary restorations were removed mechanically with an ultrasonic scaler after one-week storage in distilled water. The cavities were restored using one of two adhesives and composites; Single Bond/Filtek Z 250(Group 1, 2 and 3), UniFil Bond/UniFil F(Group 4, 5 and 6).

Following one day storage in distilled water, the restored teeth were thermocycled for 500 cycles(between 5℃ and 55℃) and immersed in 2% methylene blue for dye penetration testing. The results were analysed using Kruskal-Wallis Test, Mann-Whitney and Wilcoxon signed ranked test at a significance level of 0.05.

The results of this study were as follows:

1. Ranking of mean microleakage scores at the enamel margins was Group 1<Group 3<Group 2<Group 4<Group 5<Group 6. The microleakage of Group 6 was significantly higher than that of Groups 1, 2 and 3(p<0.05).

2. At the enamel margins, without regard to pretreatment with IRM, the microleakage of Single Bond was lower than that of UniFil Bond.

3. Ranking of mean microleakage scores at the dentin margins was Group 4<Group 1<Group 5<Group 6<Group 3<Group 2. But there were no significant difference among microleakages of each group(p>0.05).

4. At the dentin margins, the microleakage of the group not pretreated with IRM was lower than that of the group pretreated with IRM. And the microleakage of UniFil Bond was lower than that of Single Bond.

5. Compared with microleakages between the enamel and dentin margins of each groups, Group 1, 2, 3, 4, 5 and 6 at dentin margin were higher microleakage than those at enamel margin. There were significant difference between enamel and dentin microleakage of Group 2 and 3(p<0.05).

Keywords: Temporary restoration; Marginal microleakage; IRM; Dentin adhesives; Self-etching primer; One bottle adhesive

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Copyright © 2003 Korean Academy of Conservative Dentistry
(open-access) :

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Fig. 1

Fig. 1

Numbers of leakage scores of each group at enamel margins

Fig. 2

Fig. 2

Numbers of leakage scores of each group at dentin margins

Table 1

Materials and their manufacturers

Table 1

Table 2

Adhesive systems and their compositions

Table 2

Table 3

Group classification

Table 3

Table 4

Distribution of microleakage scores and means at enamel margins

Table 4

Table 5

Distribution of microleakage scores and means at dentin margins

Table 5

Table 6

Statistical analysis of microleakage at enamel margin between each group by Mann-Whitney test

Table 6

*: significant differences (p<0.05),

- : no-significant differences (p>0.05)

Table 7

Statistical analysis of microleakage at dentin margin between each group by Mann-Whitney test

Table 7

- : no-significant differences (p>0.05)

Table 8

Statistical analysis of microleakage at enamel and dentin margin between each group by Wilcoxon signed rank sum test

Table 8

*: significant differences (p<0.05), - : no-significant differences (p>0.05)