Background:
Irrigation dynamics vary in optimally shaped canals. Various factors combine to create a stress-induced environment leading to a dynamic irrigant flow.
Aim:
Evaluate the irrigant flow and apical pressure using 30 gauge open-ended needle in virtually created root canal model of single-rooted teeth.
Materials and Methods:
Sixty extracted single-rooted premolars were selected and prepared using a single rotary instrument HY-FLEX CM and grouped as : Group I: 30 size 0.6% taper (n=15), Group II: 30 size 0.4% taper (n=15), Group III: 25 size 0.6% taper (n=15), Group IV: 25 size 0.4% taper (n=15). Post instrumentation imaging was carried out using CBCT, and CAD models were obtained. Subgrouping was done based on the nozzle position, and computational fluid dynamic analysis was carried out for the respective parameters assessed.
Results:
Statistical significance was elicited in all the groups at different nozzle positions analysed. (p<0.05) A post-Hoc test revealed a significance in the mean flow rate and flow velocity in Group I at low nozzle position (p<0.05) as compared to others.
Conclusions:
30 size 0.6% tapered preparations proved efficient irrigant flow and least apical pressures at allnozzle positions.