Apical extrusion of debris after hand, engine-driven reciprocating and continuous preparation

  • Simone Bonato Luisi FOPUCRS
  • Alice Cunegatti Zottis FOPUCRS
  • Caroline Scheeren Piffer
  • Andréa Cabral de Mello Vanzin
  • Rosane Angélica Ligabue
Keywords: Root canal preparation, crown-down technique, periapical tissue, Protaper

Abstract

Purpose: This in vitro study assessed the amount of debris extruded apically after preparation with different techniques. Methods: Sixty healthy, extracted, human mandibular incisors were randomly divided into 3 groups: Group A - hand crown-down technique; Group B - crown-down technique with engine-driven rotary reciprocating instruments; Group C - Protaper: engine-driven continuous rotary instrumentation. The roots were immersed in 2.3 mL of distilled water. After preparation, the water in each tube was filtered to collect solid material extruded, and the filters were weighed using a precision scale. Data were analyzed by Kolmogorov-Smirnov and Kruskal-Wallis tests at the 0.05 level of significance. Results: The statistical analysis showed that group C had significantly higher values of debris than groups A and B. Conclusion: The instrumentation using a continuous rotary technique, Protaper, produced greater apical extrusion than the hand and engine-driven crown-down techniques. The direction of instrumentation, whether cervical-apical or apical-cervical, seems to be a more important factor influencing apical extrusion than whether the instrumentation was performed by hand or was engine-driven.

Author Biographies

Simone Bonato Luisi, FOPUCRS
Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Alice Cunegatti Zottis, FOPUCRS
Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Caroline Scheeren Piffer
Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Andréa Cabral de Mello Vanzin
Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Rosane Angélica Ligabue
Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
Published
2010-09-25
Section
Original Article