Comparison of debris extrusion in Xp-endo-Shaper and One-Shape rotary systems: in vitro study

Extrusion of debris from apex is one of the main factors of flare up (inflammation, pain or combination of both). Various studies have been conducted toward the amount of debris extrusion but no one compared this drawback on one – shape and xp-shaper system in curved root canals. So, this study aimed to determine the amount of apical debris extrusion following preparation of canal by one-shape or xp-shaper in curved canals of mesiobuccal root in mandibular first molars.
Method & Matherial: This experimental study was done on 34 mandibular first molars with 30 to 40 degree curved mesiobuccal root canal. The samples were randomly divided in two groups. First group had one – shape for root canal preparation while the other had xp-shaper. Roots of the teeth were fixed in pre weighted fluxes till cervical area so that all apical debris were collected in vials. After desiccation process, the vials were weighted again. The difference between original and secondary weight of vials containing debris is considered as weight of debris extrusion .Data were analyzed using T-test.
Amount of debris extrusion in one – shape group was 0/018±0/014 and in xp-shaper group was 0/01±0/007 and the difference was statistically significant ( 0/01).
Considering the situation and limitation of this in vitro study, xp-shaper rotary system was associated with less debris extrusion compared to one – shape systems.