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ORIGINAL RESEARCH Table of Contents   
Year : 2014  |  Volume : 25  |  Issue : 6  |  Page : 698-701
Micro-computed tomography and bond strength analysis of different root canal filling techniques


1 Department of Restorative Dentistry, Ribeirão Preto Dental School, University of São Paulo - FORP/USP, Ribeirão Preto, São Paulo, Brazil
2 Department of Endodontics, Paranaense University - UNIPAR, Francisco Beltrão, Paraná, Brazil
3 Campinas State University - UNICAMP, Piracicaba, São Paulo, Brazil
4 Grande Rio University - UNIGRANRIO, Duque de Caxias, Rio de Janeiro, Brazil

Correspondence Address:
Ricardo Machado
Department of Endodontics, Paranaense University - UNIPAR, Francisco Beltrão, Paraná
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-9290.152164

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Introduction: The aim of this study was to evaluate the quality and bond strength of three root filling techniques (lateral compaction, continuous wave of condensation and Tagger's Hybrid technique [THT]) using micro-computed tomography (CT) images and push-out tests, respectively. Materials and Methods: Thirty mandibular incisors were prepared using the same protocol and randomly divided into three groups (n = 10): Lateral condensation technique (LCT), continuous wave of condensation technique (CWCT), and THT. All specimens were filled with Gutta-percha (GP) cones and AH Plus sealer. Five specimens of each group were randomly chosen for micro-CT analysis and all of them were sectioned into 1 mm slices and subjected to push-out tests. Results: Micro-CT analysis revealed less empty spaces when GP was heated within the root canals in CWCT and THT when compared to LCT. Push-out tests showed that LCT and THT had a significantly higher displacement resistance (P < 0.05) when compared to the CWCT. Bond strength was lower in apical and middle thirds than in the coronal thirds. Conclusions: It can be concluded that LCT and THT were associated with higher bond strengths to intraradicular dentine than CWCT. However, LCT was associated with more empty voids than the other techniques.


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