INFLUENCE OF MULTIPLE ADHESIVE COATINGS ON THE SHEAR BONDING STRENGTH OF COMPOSITE RESIN

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Journal of the Korean Academy of Pediatric Dentistry 2006;33(3):377-387.
Published online August 31, 2006.

INFLUENCE OF MULTIPLE ADHESIVE COATINGS ON THE SHEAR BONDING STRENGTH OF COMPOSITE RESIN

접착제의 다층적용이 복합레진의 전단결합강도에 미치는 영향

박헌동, 이창섭, 이상호, 이난영

조선대학교 치과대학 소아치과학교실

Correspondence: ,

Abstract

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 (p<0.05). 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.

Key Words: Adhesives; Multiple coating; Shear bond strength