J Korean Acad Conserv Dent.  2004 May;29(3):273-280. 10.5395/JKACD.2004.29.3.273.

The etching effects and microtensile bond strength of total etching and self-etching adhesive system on unground enamel

• Oh SK
• Hur B
• Kim HC

• KMID: 1987103
• DOI: http://doi.org/10.5395/JKACD.2004.29.3.273

Abstract

The purpose of this study was to evaluate the etching effects and bond strength of total etching and self-etching adhesive system on unground enamel using scanning electron microscopy and microtensile bond strength test. The buccal coronal unground enamel from human extracted molars were prepared using low-speed diamond saw. Scotchbond Multi-Purpose (group SM), Clearfil SE Bond (group SE), or Adper Prompt L-Pop (group LP) were applied to the prepared teeth, and the blocks of resin composite (Filtek Z250) were built up incrementally. Resin tag formation was evaluated by scanning electron microscopy, after removal of enamel surface by acid dissolution and dehydration. For microtensile bond strength test, resin-bonded teeth were sectioned to give a bonded surface area of 1mm2. Microtensile bond strength test was perfomed. The results of this study were as follows. 1. A definite etching pattern was observed in Scotchbond Multi-Purpose group. 2. Self-etching groups were characterized as shallow and irregular etching patterns. 3. The results (mean) of microtensile bond strength were SM; 26.55 MPa, SE; 18.15 MPa, LP; 15.57 MPa. SM had significantly higher microtensile bond strength than SE and PL (p < 0.05), but there was no significant differance between SE and PL.

Keyword

Etching effect; Microtensile bond strength; Total etching; Self etching; Enamel; Scanning electron microscopy

MeSH Terms

Adhesives*
Dehydration
Dental Enamel*
Diamond
Humans
Microscopy, Electron, Scanning
Molar
Tooth
Adhesives
Diamond

Figure

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  Figure 1 The SEM photographs of resin replica using Scotchbond Multi-Purpose

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  Figure 2 The SEM photographs of resin replica using Clearfil SE Bond

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  Figure 3 The SEM photographs of resin replica using Adper Prompt L-Pop

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