Quantitative evaluation of apically extruded debris with different single-file systems: Reciproc, F360 and OneShape versus Mtwo




To assess in a laboratory setting the amount of apically extruded debris associated with different single-file nickel-titanium instrumentation systems compared to one multiple file rotary system.


Eighty human mandibular central incisors were randomly assigned to 4 groups (n=20 teeth per group). The root canals were instrumented according to the manufacturers’ instructions using the reciprocating single-file system Reciproc, the rotary single-file-systems F360 and OneShape and the multiple files rotary Mtwo instruments. The apically extruded debris was collected and dried in pre-weighed glass vials. The amount of debris was assessed with a micro balance and statistically analyzed using ANOVA and post-hoc Student-Newman-Keuls test. The time required to prepare the canals with the different instruments was also recorded.


Reciproc produced significantly more debris compared to all other systems (P<0 .05="" and="" between="" difference="" em="" file="" multiple="" no="" noted="" rotary="" significant="" single-file="" system="" systems="" the="" two="" was="">P
>0.05). Instrumentation with the three single-file systems was significantly faster than with Mtwo (P<0 .05="" p="">


Under the condition of this study, all systems caused apical debris extrusion. Rotary instrumentation was associated with less debris extrusion compared to reciprocal instrumentation.


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