Effect of immediate post space preparation after three different root canal preparation technique on apical sealing ability in straight root canals

Objective To investigate the effect of immediate post space preparation after root canal obturation with different root canal preparation technique on apical sealing ability in straight root canals.Methods One hundred and twenty four upper anterior teeth with straight root canals were collected, 120 teeth were randomly assigned to 3 groups (n=40). Group A: stainless steel file conventional root canal preparation technique; group B: Gate-Glidden drill coronal preflaring plus stainless steel file conventional root canal preparation technique; group C: ProTaper for hand crown-down technique. The remained four teeth were equally divided into negative control group and positive control group. All the prepared canals were obturated with cold lateral condensation. A portion of the root canal filling material was removed with vertical plugger, and post space was prepared with Peeso reamer. Dye penetration was used to evaluate the apical sealing ability of different groups.Results The apical microleakage of group B and C was less than that of group A(P0.05).Conclusion The apical sealing ability of immediate post space preparation after root canal obturation with large taper root canal preparation was better than conventional root canal preparation.