(PR68) Efficacy of Different Solvents for Retreatment of Teeth Obturated Using Bioceramic Sealer

Abstract:

Introduction: The purpose of this study was to compare the efficacy of Formic acid (FA), Hydrochloric acid (HCl), and chloroform (CHCl3) for retreatment of teeth obturated with gutta percha and bioceramic sealer.

Methods: 45 extracted single-canaled teeth were instrumented to size 40/0.04. Canals were obturated 1.5 mm short of the working length using EndoSequence BC sealer and gutta percha. The remaining 1.5 mm of the canal was obturated with sealer only to the level of the working length. After 2 weeks gutta-percha was removed using heat and rotary instrumentation. The teeth were randomly divided into 3 different groups: 3 mL of 10% FA , 3 ML of HCl , and 3 ML of Chloroform. Once the solvents were placed in the canal, the time to gain patency through the bioceramic sealer using a 10 C file was recorded. Kruskal Wallis and Mann Whitney were used to evaluate the results.

Results: Patency was achieved in all canals except for 1 of the teeth in the chloroform group. The median time recorded was 28.2 s (IQR: 60.12) for Chloroform, 33.2 s (IQR: 43.41) for FA, and 14.78 s (IQR: 20.3) for the HCl group. There was a significant difference between the 3 groups (P < .01481). No significant difference was noted between chloroform and FA (P < 0.85), there was however a significant difference between chloroform and HCl (P < 0.007) and between FA and HCl (P < 0.024).

Conclusion: HCl was superior to FA and chloroform in achieving patency in teeth obturated with bioceramic sealer.