J Korean Acad Conserv Dent.  2005 May;30(3):204-214. 10.5395/JKACD.2005.30.3.204.

The change of adaptability change in adhesive systems to dentin substrte according to storage time

• Cho YG
• Ban IH
• Yu MK

• KMID: 2045246
• DOI: http://doi.org/10.5395/JKACD.2005.30.3.204

Abstract

This study compared the microtensile bond strength (microTBS) and microscopic change of two 2-step and two 1-step self-etching adhesives to dentin according to storage times in distilled water. Occlusal dentin was exposed in 48 human molars. They were divided to four groups by different adhesives: SE Bond group (Clearfil SE Bond), AdheSE group (AdheSE), Adper group (Adper Prompt L-Pop), and Xeno group (Xeno III). Each group was stored in 37degrees C distilled water for 1, 15, and 30 days. Resin-bonded specimens were sectioned into beams and subjected to microTBS testing with a crosshead speed of 1 mm/minute. For SEM observation, one specimen was selected and sectioned in each group after each stroage time. Resin-dentin interface was observed under FE-SEM. In all storage times, mean microTBS of SE group was significantly higher than those of other groups (p < 0.05). There was no significant difference between mean microTBS of SE group and AdheSE group among all storage times, but significant difference between 1- and 30-day storage in mean microTBS of Adper group and Xeno group (p < 0.05). For 1-and 15-day storage, all groups showed the close adaptation between resindentin interfaces. For 30-day storage, resin-dentin interfaces showed wide gap in Adper group and separate pattern in Xeno III group.

Keyword

Microtensile bond strength; Microscopic adaptability change; 2-step and 1-step self-etching adhesive; Storage time

MeSH Terms

Adhesives*
Dentin*
Humans
Molar
Water
Adhesives
Water

Figure

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  Figure 1. Histogram showing microtensile bond strengths for each group to dentin according to storage times in distilled water.

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  Figure 2. SEM photographs showing the close adaptation of dentin-resin interface produced by Clearfil SE Bond (SE), AdheSE (AD), Adper Prompt L-Pop (LP), and Xeno III (XE) after 1-day distilled water storage (× 1000).

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  Figure 3. SEM photographs showing the close adaptation of dentin-resin interface produced by Clearfil SE Bond (SE), AdheSE (AD), Adper Prompt L-Pop (LP), and Xeno III (XE) after 15-day distilled water storage (× 1000).

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  Figure 4. SEM photographs showing the close adaptation of dentin-resin interface produced by Clearfil SE Bond (SE) and tiny gap between dentin and resin interface produced by AdheSE (AD) after 30-day distilled water storage (× 1000).

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  Figure 5. SEM photographs showing wide gap between the dentin-resin interface produced by Adper Prompt L-Pop (LP), and separate pattern between the interface of resin and adhesive layer produced by Xeno III (XE) after 30-day distilled water storage (× 1000).

Reference

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