Comparison of Apical Transportation between Two Rotary File Systems and Two Hybrid Rotary Instrumentation Sequences
Frank C. Setzer, DDS, MS, PhD,* Tae-Kyung Kwon, DDS, MSD,† and Bekir Karabucak, DMD, MS*
JOE — Volume 36, Number 7, July 2010
Introduction:
The aim of this study was to evaluate apical transportation of 2 rotary file systems and 2 hybrid rotary instrumentation sequences.
Methods:
One hundred twenty-four mesiobuccal canals of ex- tracted molars were instrumented by 4 nickel-titanium rotary sequences. Group PF (n = 32) was instrumented with ProFile Series 29 to size #6 (#36/.06) at working length (WL). Group ES (n = 28) used EndoSequence to #35/.06. Group PFLS (n = 32) used ProFile Series 29 fol- lowed by LightSpeed in a hybrid technique to a final size #50. Group PTLS (n = 32) was instrumented with Pro- Taper and additional enlargement with LightSpeed to #50 in a hybrid technique. A double-digital radiographic technique was used to measure canal transportation at 0.5–5.0 mm from WL. Statistical analysis was carried out with one-way analysis of variance.
Results:
There was no statistically significant difference for apical transpor- tation between the groups at any level from the WL (0.5 mm,P=.74;1.0mm,P=.09;2.0mm,P=.29;3.0mm, P=.65;4.0mm,P=.21;5.0mm,P=.12).Conclu- sions: indicated that combining different file systems does not lead to increased levels of apical transporta- tion. Hybrid instrumentation might be a valid alternative to achieve larger apical diameters without higher risk of procedural errors. (J Endod 2010;36:1226–1229)
Key Words
Apical transportation, hybrid technique, rotary instru- ment, rotary instrumentation
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