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KMID : 0358920070340030420
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Journal of the Korean Academy of Pedodontics
2007 Volume.34 No. 3 p.420 ~ p.429
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MICROTENSILE BOND STRENGTH OF DENTIN BONDING ADHESIVES ON BOVINE TEETH
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Song Eun-Joo
Kim Jae-Moon
Kim Shin
Jeong Sung-Hee
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Abstract
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The purpose of this study was to compare the micro ensile bond strength to bovine dentin of several adhesives (SM, Scotch Multipurpose; SB, Single Bond 2; SE, SE Bond; AQ, AQ ; TS, tri-S Bond). Except SM and SB, they have a simplified one- or two-step application protocols in compare with the dentin adhesives conventional three-step protocols. For the microtensile bond strength test, the labial surfaces of bovine incisors were used. Following exposure of dentin layer, according to their manufacturer’s directions, each dentin adhesives were applied and composite resin blocks were constructed. The teeth were sectioned for specimen and tested microtensile bond strength. Also observed the fracture mode of interface. The obtained results were as follows : 1. The microtensile bond strength values ranged from 51.34 to 24.04 MPa on dentin(in decreasing order, SE, SM, SB, AQ and TS). 2. The highest microtensile bond strength was by SE and SM on bovine dentin, and the lowest by AQ and TS. 3. SM, SB and SE showed cohesive failures and adhesive failure but AQ, TS presented almost adhesive failures. In summary, microtensile bond strengths of single-step adhesives (AQ and TS) on bovine dentin were significantly lower than those of multi-step adhesives (SM, SB and SE) (p<0.05).
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KEYWORD
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Microtensile strength, Dentin adhesive
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