Abstract:

Objective To examine the compositions of those adhesion modes between luting cements and canal dentin, and to evaluate the dentin- cement- post interface by Laser- Raman spectroscopy. Methods Three representative luting cements（zinc phosphate, glass ionomer and resin cements）, two kinds of prefabricated posts（titanium and fiber - glass）, six extracted intact human maxillary anterior teeth were used canal dentin after endodontic treatment. Laser- Raman spectroscopy measure of cement, post and canal dentin before and after luting together. Results There are no evident Raman spectra change cross the ZPC/dentin interface and glass ionomer/dentin interface, while cross the resin/dentin interface and resin/glass fiber post interface can be seen special Raman spectra. Conclusion Laser- Raman microspectroscopy is a useful analytical technique for evaluation interface between dentin and luting cements. Resin cement may interact with dentin and glass fiber post.

Key words: Laser- Raman microspectroscopy, root canal dentin, luting cement, post