Abstract: Objective: To investigate the quality of root canal obturation using synchrotron radiation based diffraction enhanced imaging CT. Methods: Ten lower premolars were collected, and the root canals were prepared and obturated. All teeth were scanned with synchrotron radiation based diffraction enhanced imaging CT and reconstruction of the obturated root canals was performed. Results: Root canals and lateral canals were observed and interface voids and gaps around dentin were surveyed. Conclusion: Synchrotron radiation based diffraction enhanced imaging CT has the potential benefit on analyzing the effects of root canal obturation.

Key words: Root canal obturation , Synchrotron radiation , Diffraction enhanced imaging