In vitro analysis of the apical deformation, using a different number of files during the instrumentation
Journal Title: RSBO - Year 2009, Vol 6, Issue 4
Abstract
Introduction and objective: The aim of the present study was to evaluate in vitro the apical deformation in roots of crooked lower incisors with mesio-distal flattening, using a different number of files during the instrumentation. Material and methods: Twenty roots were randomly divided into two groups (n = 10). Group I: roots were initially instrumented with a K #15 file until a #35 file, through step-back technique. During instrumentation, the canals were irrigated with 1 mL of 1% NaOCl between every instrument change. Obturation was performed with Grossman sealer by lateral condensation technique. Group II: procedure was similar to group I, except for the files number, using file #40 as memory instrument. After that, each root was 1mm apical weared in order to reveal the filling. A 3 mm cut from the root apex was performed, resulting in samples with the same length, which were examined with an optical microscope (X40). The images captured by the Image Tool software were analyzed and the area occupied by sealer, gutta-percha and possible empty spaces was quantified. Results: Data was submitted to statistical analysis and showed no statistical significant differences between groups I and II (p > 0.05). Conclusion: The variation in the number of files during instrumentation did not promote apical deformation, but resulted in a similar hermetic sealing between the studied groups.
Authors and Affiliations
Lucas GARCIA, André MARQUES, Gabriela ALMEIDA, Manoel SOUSA-NETO, Simonides CONSANI
Keywords
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