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  • Title: Tensile bond strength of composite to air-abraded dentin.
    Author: Geitel B, Wischnewski R, Jahn KR, Barthel RC, Zimmer S, Roulet JF.
    Journal: Oper Dent; 2004; 29(1):69-74. PubMed ID: 14753335.
    Abstract:
    This study evaluated the influence of air abrasive treatment of dentin surfaces on the tensile bond strength between dentin and two different composite-adhesive-systems Multi-Purpose/Z100 and OptiBond FL/Herculite XR). The crowns of 200 maxillary central incisors were embedded in resin and then ground to expose a dentin surface 5 mm in diameter. The surfaces were etched or abraded by using a KCP 1000 device with different treatment conditions. Adhesive systems were applied according to the manufacturer's instructions and composite cylinders were bonded to the conditioned dentinal surface using a split mold. Tensile bond strength values and failure modes were then determined. Tensile bond strength values of the acid-etched dentin-composite-interface were significantly higher than for the interface between air-abraded dentin and composite, independent of the composite-adhesive-system used. The light microscopic evaluation showed mainly adhesive and combined adhesive-cohesive fractures. Significantly more adhesive fractures could be observed between abraded dentin and composite than between etched dentin and composite.
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