Group I: AH + sealer; Protaper universal retreatment files alone for retreatment – 15 teeth, Group II: Portland cement as sealer; Protaper universal retreatment files alone for retreatement – 15 teeth, Group III: AH + sealer; Protaper universal retreatment files followed by H file for retreatment – 15 teeth, Group IV: Portland cement as sealer; Protaper universal retreatemtn files followed by H file for retreatement – 15 teeth. The teeth were sectioned after the retreatment process and observaed under stereomicroscope for remaining filling material.

All the groups were compared and the results were not significant. Within the limitations of this study it can be concluded that Portland cement has the required retrievability property when used as a sealer, further research with regard to its property such as handling, wetting, dentinal tubule penetration and interaction with dentine need to be studied.