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Effect of wetness on the enamel bonding


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Effect of wetness on the enamel bonding

Article information

Restor Dent Endod. 2004;29(3):205-211
Publication date (electronic) : 2004 May 31
doi : https://doi.org/10.5395/JKACD.2004.29.3.205
Keun-Ho Ko, Young-Gon Cho, Cheul-Hee Jin, Sang-Hoon Yoo, Jong-Uk Kim, Byung-Cheul Park, Young-Jae Ki, Hee-Young Choi, Jong-Jin Kim
Department of Conservative Dentistry, College of Dentistry, Chosun University, Korea.
Corresponding author: Young-Gon Cho. Department of Conservative Dentistry, College of Dentistry, Chosun University, 421 Susuk-dong, Dong-gu, Gwangju, 501-825, Korea. Tel: 82-62-220-3840, Fax: 82-62-232-9064, ygcho@mail.chosun.ac.kr

Abstract

This study evaluated the microleakage and interfacial gap between enamel and composite resin under the dry and wet condition of the enamel surface. V shaped class 5 cavities were prepared on the occlusal portion of extracted human molars. Samples were divided into three groups: D group (air dry for 10-15 s), BD group (blot dry with moist cotton pellet), and DR group (air dry for 10-15 s and rewet with Aqua-Prep F for 20 s).

Cavities were filled using Aelitefil composite resin after applied One-Step. Microleakage was tested by 2% methylene blue dye solution and the data were statistically analysed by Kruskal-Wallis test and Mann-Whitney test. Also Enamel-resin interface was observed under SEM. Group BD showed statistically lower microleakage than group D (p < 0.05), but there was no statistically significant difference between group BD and DR (p > 0.05). At the enamel-resin interface, group D showed the gap of 2 µm thickness, but group BD and DR showed close adaptation.

In conclusion, the use of blot dry and rewetting agent (Aqua-Prep F) resulted in decreased microleakage and improved adhesion between enamel and resin when using One-Step.

Keywords: Microleakage; Interfacial gap; Air dry; Blot dry; Rewet

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Article information Continued

Copyright © 2004 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.

Figure 1

Figure 1

Number of microleakage scores of each group

Figure 2

Figure 2

D (dry) group showed the gap (G) of 2 µm thickness at the enamel (E)-resin (R) interface (SEM ×5,000)

Figure 3

Figure 3

BD (blot dry) group showed close adaptaition (CA) at the enamel (E)-resin (R) interface (SEM ×5,000)

Figure 4

Figure 4

DR (dry/rewet with Aqua-Prep F) group showed close adaptation (CA) at the enamel (E)-resin (R) interface (SEM ×5,000)

Table 1

Materials used in this study and their chemical composition

Table 1

BPDM, biphenyl dimethacrylate; Bis-GMA, bisphenol glycidyl methacrylate;

HEMA, 2-hydroxyethyl methacrylate; TEGDMA, triethylenglycol dimethacrylate

Table 2

Group classification according to the surface condition of cavity

Table 2

Table 3

Distribution of microleakage scores and means at enamel margins

Table 3

Table 4

Statistical analysis to enamel microleakage among groups by Kruskal-Wallis test and Mann-Whitney test

Table 4

*: significant differences (p < 0.05)