Apical Extrusion of Irrigants in Immature Permanent Teeth by Using EndoVac and Needle Irrigation: An in Vitro Study

Objective: immature teeth have a large apical opening and thin divergent or pa-rallel dentinal walls; hence, with conventional needle irrigation there is a very high possibility of extrusion. this study was done to compare the apical extrusion of naocl in an immature root delivered using endovac and needle irrigation.materials and methods: eighty freshly extracted maxillary central incisors were decoronated followed by access cavity preparation. modified organotypic protocol was performed to create an open apex; then, the samples were divided into four groups (n=20): endovac microcannula (group i), endovac macrocan-nula (group ii), navitip irrigation needle (group iii) and max-i-probe irrigating needle (group iv); 9.0 ml of 3% sodium hypochlorite was delivered slowly over a period of 60 seconds. extruded irrigants were collected in a vial and analysed sta-tistically.results: group i, group iii and group iv showed 100% extrusion (20/20) but group ii showed only 40% extrusion (8/20). the difference in this respect between group ii and other groups was statistically significant (p<0.001). with regards to the volume of extrusion, group ii had only 0.23 ml of extruded irrigant. group i extruded 7.53ml of the irrigant. group iii and group iv extruded the entire volume of irrigant delivered.conclusion: endovac macrocannula resulted in the least extrusion of irrigant in immature teeth when compared to endovac microcannula and conventional needle irrigation