Author/Authors :
Delvarani, Abbas Dental Material Research Center - Dental Branch, Azad University, Tehran , Mohammadzadeh Akhlaghi, Nahid Department of Endodontics - Cranio-maxillo-facial Research Center - Dental Branch, Islamic Azad University, Tehran , Aminirad, Raana Private Practice - Mianeh, East Azerbaijan , Tour Savadkouhi, Sohrab Dental Material Research Center - Dental Branch, Azad University, Tehran , Vahdati, Aliakbar Department of Endodontics - Dental School, Loma Linda University, CA, USA
Abstract :
Introduction: The aim of this in vitro study was to compare the amount of apically
extruded debris after root canal preparation using rotary and reciprocating systems in
severely curved root canals. Methods and Materials: Thirty six extracted human
mandibular first molars with 25-35° curvature in their mesiobuccal (MB) canal (according
to Schneider’s method) were cleaned and shaped with ProTaper and WaveOne systems.
The extruded debris was collected and their net weight was calculated. To compare the
efficiency of the two systems, the operation time was also measured. The data were
analyzed with t-test. Results: The amount of extruded debris in WaveOne group was
significantly greater in comparison with ProTaper group (26%). The operating time for
ProTaper was however, significantly longer than WaveOne. Conclusion: Both root
preparation systems caused some degree of debris extrusion through the apical foramen.
However, this amount was greater in WaveOne instruments.
Keywords :
Apical Extrusion , Curved Canals , Reciprocating File , Root Canal Preparation , Rotary Instrumentation
