J Korean Acad Conserv Dent.  2004 May;29(3):205-211. 10.5395/JKACD.2004.29.3.205.

Effect of wetness on the enamel bonding

• Ko KH
• Cho YG
• Jin CH
• Yoo SH
• Kim JU
• Park BC
• Ki YJ
• Choi HY
• Kim JJ

• KMID: 1987095
• DOI: http://doi.org/10.5395/JKACD.2004.29.3.205

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 microm 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.

Keyword

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

MeSH Terms

Dental Enamel*
Humans
Methylene Blue
Molar
Methylene Blue

Figure

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  Figure 1 Number of microleakage scores of each group

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

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  Figure 3 BD (blot dry) group showed close adaptaition (CA) at the enamel (E)-resin (R) interface (SEM ×5,000)

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  Figure 4 DR (dry/rewet with Aqua-Prep F) group showed close adaptation (CA) at the enamel (E)-resin (R) interface (SEM ×5,000)

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