Comparative Assessment of Canal Transportation, Dentin Loss, and Remaining Root Filling Material by Different Retreatment Files An Cross-Sectional Study.

AIM

The purpose of this study was to evaluate the centering ability, canal transportation and efficacy of re-treatment rotary and hand files in removing Gutta Percha from root canals using Cone Beam Computed Tomography(CBCT).

MATERIALS AND METHODS

Sixty extracted human maxillary anteriors were obturated and randomly divided into three groups. Root fillings were removed with ProTaper Universal retreatment system, R-Endo system, and Hedstrom files. CBCT scans were taken.

STATISTICAL ANALYSIS AND RESULTS

The data were analyzed using the Statistical Package for the Social Sciences (SPSS 15.0, IBM). The mean and standard deviation among the groups was calculated by one-way analysis of variance, Kruskal-Wallis, and Mann- Whitney U-tests, and the comparison among the various groups was done by Tukey's test. A statistically significant amount of remaining root canal filling material and canal transportation was noted ( < 0.05).

CONCLUSION

No system completely removed the root filling material from root canals. Manual instrumentation resulted in more dentin loss and canal transportation than rotary file system.