Influence of foraminal enlargement on the apical extrusion of filling material: Volumetric analysis using micro‐computed tomography

The aim of this study was to compare the root canal instrumentation techniques that involve foraminal enlargement versus those not involving it, in regard to the apical extrusion of filling material, using micro‐computed tomography (micro‐CT). Twenty‐two premolars with single canals were instrumente...

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Bibliographic Details
Published in:Australian endodontic journal 2020-08, Vol.46 (2), p.210-216
Main Authors: Albuquerque, Patrícia Pereira, Hungaro Duarte, Marco Antonio, Pelegrine, Rina Andréa, Kato, Augusto Shoji, Stringheta, Carolina Pessoa, Duque, Jussaro Alves, Bueno, Carlos Eduardo da Silveira
Format: Article
Language:English
Subjects:
apical foramen
Computed tomography
Dentistry
Endodontics
Enlargement
foraminal enlargement
foraminal patency
Premolars
root canal obturation
Root canals
Volumetric analysis
X‐ray computed tomography
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Summary:The aim of this study was to compare the root canal instrumentation techniques that involve foraminal enlargement versus those not involving it, in regard to the apical extrusion of filling material, using micro‐computed tomography (micro‐CT). Twenty‐two premolars with single canals were instrumented using the ProTaper Universal System and then randomly divided into two groups (n = 11): Group NFE, without foraminal enlargement, and Group FE, with foraminal enlargement. Instrumentation was performed up to 1 mm short of the apical foramen, and foraminal patency was maintained at each instrument change in both groups. Prior to obturation, the apical portion of the specimens was wrapped in adhesive paper to ensure complete separation between apex and extruded material. The canals were filled according to the continuous wave of condensation technique. The apically extruded material was collected and measured using micro‐CT. Extrusion in Group FE was significantly higher than in Group NFE (0.928 mm3 vs. 0.148 mm3; P 
ISSN:1329-1947
1747-4477
DOI:10.1111/aej.12394