Year : 2018

Volume : Volume 8

Issue : Issue 2

Abstract

Aim:  To compare the effectiveness in reaching full working length and fracture rate of four pathfinding nickel titanium  rotary systems in mechanically negotiating moderately curved molar canals. Materials and method: Forty extracted permanent maxillary (n=20) and mandibular (n=20) first and second molars are included in this study. Access opening has  done and patency of canal  confirmed by inserting ISO size 08 K file. Samples were divided according to the type of pathfinding nickel  titanium rotary systems: Four groups: Group 1: Glide path preparation performed using M2, Group 2: Glide path preparation  performed using Proglider, Group 3: Glide path preparation performed using G files, Group 4: Glide path preparation performed using Pathfiles The absolute and percentage frequencies of molars in which the pathfinding instruments reaching full working length until resistance was encountered and instruments fracture rate in all root canals in all groups were recorded. Results: The highest and lowest frequency of canals classified as RFWL were observed in the Pathfile (83.33) and proglider groups(73.33) whereas M2 and G files showed intermediate results. The highest percentage frequency of instrument separation was observed in the Proglider group (6.66).  Conclusions: The lack of glidepath establishment and glidepath enlargement is often the cause of ledge formation, transportation, blockage of root canals followed by obturation short of the apical constrictor.

Keywords: Glide path, Nickel titanium rotary instruments, Pathfinding instruments.