Objective:

To evaluatethe influence of threedifferent instrumentation techniques on the incidence of postoperative pain after endodontic treatment.

Material and Methods:

Ninety permanent single rooted mandibular premolar with sign and symptoms of non-vital teethwere selected.

Patients were randomly divided into three different groups according to the type of instrumentation:

Group 1=Reciproc; Group 2=Twisted File incontinuousmotion and Group 3=WaveOne. Oburation was done with corresponding guttapercha points using zinc oxide eugenol sealer. The intensity of pain was recorded by the patient using visual analoguescale, after 2hr,6hr,12hr,48hr and 3days of completion of obturation.Data analysis was done using Wilcoxon signed-rankstest. The level of significance was set at 5%.

Results:

For Group 1 at 12 hours mean was 4.53 + 1.9 and median was 5. The mean value increased from 2 hours to 6 hours upto 12 hours and decreased after 48 hours till 3rd day. For Group 2 at 12 hours mean was 2.80 + 0.71 and median was 3.00. The mean value increased from 2 hours to 6 hours upto 12 hours and decreased after 48 hours till third day. For Group 3 at 12 hours mean was 4.77 + 1.81 and median was 5.00. Mean value increased from 2 hrupto 12 hr and decreased from 12 hours upto third day.At interval from 2-48 hours there is no significant difference seen between 3 groups and at 2 hours-3 days interval significant difference was seen in first group, but no significant results were seen between group 2 and group 3. There was no significant difference seen between all the groups at the interval of 6-12 hours (p>0.05).

Conclusion:

Pain score was less in case of Twisted File continuous motion technique while it was more in WaveOne and Reciproc technique (AU).