The clinical success of dental composites depends critically upon the adhesive bond that secures it to the tooth. Previous efforts to characterize the adhesive/dentin interface have generally required sample preparation that alters or damages the interface. Using microRaman spectroscopy, we have collected chemical and morphologic information on the dentin/adhesive interface with minimal sample preparation. Results from this technique have provided direct evidence of adhesive penetration and demineralization depth for two adhesive systems.

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