To demonstrate the effect of several irrigants used during root canal procedures.
2.Chemical irrigation- 1% , 6% NaOCl, 6% NaOCl+ 3% H2O2, EDTA, RCPrept, Polyacrylic acid.
3.Sealed chemical irrigations for 24 hours.
Each group had 2 teeth split down the length of the root and examined under scaning electron microscope.
1.All irrigations showed smear layer and debris except for EDTA
2.6% NaOCl+ 3% H2O2 is less effective than NaOCl alone and decreses the effectiveness of EDTA in the apical 1/3
3.RC Prep- More debris remaining than with water irrigation
4. EDTA showed completely smear free surface after 24
EDTA is most effective in terms of removing the smear layer
Nothing can remove the smear layer and debris completely