TY - JOUR ID - TI - Comparison of apically extruded debris of different nickel titanium instruments AU - Dr. Diyar Kh. Bakr, B.D.S., M.Sc., Ph.D.* د. ديار بكر PY - 2017 VL - 14 IS - 1 SP - 16 EP - 23 JO - MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان SN - 26188500 18138500 AB - Background and objective: During root canal instrumentation irrigants, necroticpulp tissue, microorganism and dentin debris may be extruded beyond the apexinto the periradicular tissue. These extrusions may cause flare-up. The purpose ofthis study was to compare the amount of apically extruded debris with three rotaryNickel titanium instruments.Methods: Sixty single rooted, single canalled premolars were selected. The rootswere divided randomly into three groups; (n = 10) according to the type ofinstrumentation system used, group 1“ProTaper Next” system, group 2 “OneShape” system and group 3 “Mani Silk” system. The Debris extruded during theinstrumentation was collected and dried in preweighed vials and the amount ofextruded debris was assessed with an electronic balance.Result: results showed that the Mani silk system extruded significantly less debristhan the ProTaper Next and One shape systems (P < .05), and there is nosignificant difference in apically extruded debris between ProTaper Next groupand One Shape group but the One Shape produced more debris than ProTaperNext.Conclusion: the Mani silk file instrument was behaved well during instrumentationand extruded less debris than the other groups.

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