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

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05/5/2014 11:49 AM

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



MervetM. Al-Bakry, B.D.S., M.Sc. (1)


ABSTRACT

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. Endofill root canal sealer was employed as the common sealant. Results: The least apical microleakage 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 microleakage 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.
Keywords: Apical seal, soft core, hand ProTaper, Rotary ProTaper, step-back technique.




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