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KMID : 0358920060330030377
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Journal of the Korean Academy of Pedodontics
2006 Volume.33 No. 3 p.377 ~ p.387
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INFLUENCE OF MULTIPLE ADHESIVE COATINGS ON THE SHEAR BONDING STRENGTH OF COMPOSITE RESIN
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Park Heon-Dong
Lee Chang-Seep
Lee Sang-Ho
Lee Nan-Young
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Abstract
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The objective of this study was to evaluate the influence of multiple adhesive coatings on the thickness of hybrid and adhesive layer and shear bond strength(SBS) of self-etch adhesives and self-etch primer adhesives. The buccal or lingual crown dentin of extracted human molars was used. Self-etch adhesives or self-etch primer adhesives were applied 1, 2 and 3 times on the dentin before light curing. In another group adhesives were reapplied after light curing first layer. Treated surfaces were prepared to measure the thickness of hybrid and adhesive layer with SEM, and shear bond strength to dentin using an Instron machine.
The following results were obtained :
1. The adhesive layers increased with the number of coatings(p<0.05) with all adhesives. Adpor Prompt L-Pop and Xeno III were significantly thinner than self-etch primer adhesives (p<0.05).
2. The thickness of hybrid layers increased with the number of coatings
3. The shear bonding strength of Unifil Bond and Clearfill SE Bond were higher than Scotchbond Multipurpose Plus and Adpor Prompt L-Pop (p<0.05), and similar with Xeno III.
4. The shear bond strength increased significantly with the number of coatings in Adpor Prompt L-Pop(p<0.05), but decreased at 3 times in AdheSE Bond(p>0.05).
5. In Adpor Prompt L-Pop and Xeno III, the shear bond strength decreased when adhesives were reapplied after curing the first adhesive layer.
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KEYWORD
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Adhesives, Multiple coating, Shear bond strength
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