The Study Of Coronal Microleakage Of Different Post And Core Materials In Vitro

Objective: The aim of this study was to compare the coronal microleakage of prefabricated post and composite resin cores, conventional amalgam cores, and bonded amalgam coronal -radicular restorations on endodotically treated posterior teeth.Method: Thirty extracted human posterior teeth were root-filled and prepared for prefabricated post and composite resin cores, conventional amalgam cores, and bonded coronal-radicular amalgam restorations. The teeth were wrapped and immersed in India ink for 1 week. Another 10 teeth were selected as positive control and negative control. The ink penetration was assessed with a coded scoring system.Results: The bonded amalgam groups had significantly less microleakage than did the nonbonded groups. But no statistically significant differences in leakage were detected between the nonbond groups and the composite resin post and cores.Conclusion: To reduce the microleakage, it might be recommended to restore the endodontically treated posterior tooth using a bonded amalgam coronal-radicular technique.