Apical Extrusion of Debris Using Self-Adjusting File, Reciprocating Single-File, And 2 Rotary Instrumentation Systems

S. Koçak, M. M. Koçak, B. C. Sağlam, S. A. Türker, B. Sağsen, and Ö. Er

Journal of Endodontics. 2013 October; 39(10):1278-80.


INTRODUCTION: The purpose of this study was to evaluate the weight of debris extruded apically from teeth using different in vitro preparation techniques.

METHODS: Sixty-eight extracted human mandibular premolars with single canals and similar lengths were instrumented using ProTaper F2 (25, .08; Dentsply Maillefer, Ballaigues, Switzerland), the Self-Adjusting File (1.5-mm diameter; Re-Dent Nova, Ra'anana, Israel), Revo-S SU (25, .06; MicroMega, Besancon, France), or Reciproc (R25; VDW GmbH, Munich Germany). Debris extruded during instrumentation were collected into preweighed Eppendorf tubes. The Eppendorf tubes were then stored in an incubator at 70°C for 5 days. The Eppendorf tubes were weighed to obtain the final weight of the Eppendorf tubes when the extruded debris were included. Three consecutive weights were obtained for each tube.

RESULTS: There were no statistically significant differences among the groups (P = .218). The ProTaper group produced the highest mean extrusion value. The Reciproc produced less debris compared with all the other instruments (P > .05).

CONCLUSIONS: All instrumentation techniques were associated with extruded debris.

Additional Info

  • ReDent Nova’s note:


    The SAF was only operated after the canal was shaped by hand files, to a larger extent than the recommended glidepath, thus caused extrusion of debris prior to the operation of the SAF.

    Moreover, irrigation rate of 1mL/min, as used here, is insufficient and does not comply with the manufacturer's instructions.

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  • View abstract on PubMed. PMID: 24041391