Comparison of apically extruded debris of different nickel titanium instruments

Abstract

Abstract
Background and objective: During root canal instrumentation irrigants, necrotic
pulp tissue, microorganism and dentin debris may be extruded beyond the apex
into the periradicular tissue. These extrusions may cause flare-up. The purpose of
this study was to compare the amount of apically extruded debris with three rotary
Nickel titanium instruments.
Methods: Sixty single rooted, single canalled premolars were selected. The roots
were divided randomly into three groups; (n = 10) according to the type of
instrumentation system used, group 1“ProTaper Next” system, group 2 “One
Shape” system and group 3 “Mani Silk” system. The Debris extruded during the
instrumentation was collected and dried in preweighed vials and the amount of
extruded debris was assessed with an electronic balance.
Result: results showed that the Mani silk system extruded significantly less debris
than the ProTaper Next and One shape systems (P < .05), and there is no
significant difference in apically extruded debris between ProTaper Next group
and One Shape group but the One Shape produced more debris than ProTaper
Next.
Conclusion: the Mani silk file instrument was behaved well during instrumentation
and extruded less debris than the other groups.