Summary:
A total 30 root canals, curvature ranging between 0 and 35
degree, were divided into three groups, A, B and C, consisting
of 10 canals in each. Five canals from each group were
prepared with FlexMaster using crown-down technique and
the others with hand instrument K-Felxofile using
conventional and step-back technique. Irrigation was done
with sodium hypochlorite (NaOCl) solution and ethylene diamine
tetra-acetic acid (EDTA) after canal preparation by
each instrument size. All the prepared roots were then cut
longitudinally using diamond burs in turbine handpiece.