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KMID : 1036420090020020005
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대한치의학회 영문학회지
2009 Volume.2 No. 2 p.5 ~ p.11
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Effect of Hydrophobic, Neutral Adhesive on the Dentin Bond Strength of Self-etching Adhesive
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Bae Ji-Hyun
Choi Yong-Hoon
Jung Moon-Kyung
Cho Byeong-Hoon
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Abstract
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Objectives : This study investigated the hypothesis that the dentin bond strength of self-etching adhesives (SEAs) may be improved by applying a coat of hydrophobic, neutral adhesive resin in addition to SEA.
Method and Materials : The bond strengths of two SEAs - Experimental SEA (EX) and Adper Prompt (AP) - were measured with three bonding protocols. The D/E resin of All-Bond 2 was applied as the hydrophobic, neutral adhesive. Clearfil SE Bond (SE, self-etching primer system) and All-Bond 2 (AB, total etching system) were used as references. The following protocols were used: (1) EX1 (EX 1 coat); (2) EX2 (EX 2 coats); (3) EX+ (EX 1 coat + D/E resin); (4) AP1 (AP 1 coat); (5) AP2 (AP 2 coats); (6) AP+ (AP 1 coat + D/E resin); (7) SE (SE primer + SE bond); (8) SE+ (SE primer + D/E resin); (9) AB (etching + AB primer + D/E resin). Filtek Z250 composite resin was built up and the microtensile bond strength (MTBS) values of the specimens were compared. The fractured surfaces were observed using SEM.
Results : When SEA was used as self-etching primer and hydrophobic, neutral adhesive was applied as well, MTBS was significantly higher than that when either one coat or two coats of SEA only were used (p < 0.05).
Conclusion : The hydrophobic, neutral adhesive improved the integrity of the bonded interface obtained with SEA.
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KEYWORD
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self-etching adhesive, microtensile bond strength, neutral pH, hydrophobic adhesive, acidic monomer, SEM
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