The effect of root canal instrumentation technique on sealing ability of soft core obturation system

الملخص EN

Background : The aim of this study is to compare the apical sealing ability of three different instrumentation techniques using dye penetration.

Materials and methods : Thirty extracted human single straight canals were collected and these teeth were randomly divided into three groups.

There were 10 teeth in each group.

The teeth were instrumented as follows : group A with hand P.T, group B with Rotary P.T.

and group C with step –back technique then obturation with soft core was done.

Endofil root canal sealer was employed as the common sealant.

Results : The least apical micro leakage was seen in hand P.T while the highest apical microleakagewas seen in stepback technique.

There was no statistically significant difference between group A and group B (P> 0.05) while there was statistically significant difference between group A and group C which is (P=o.o12) and between group B and group C which is P= 0.019.

Conclusion : The highest apical micro leakage was seen in step-back technique while least apical microleakagewas seen in hand ProTaper technique followed by rotary ProTaper technique with no statistical significant difference between hand and rotary ProTaper.