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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Analysis of four gutta-percha techniques used to fill mesial root canals of mandibular molars

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Marciano, M. A. [1] ; Ordinola-Zapata, R. [1] ; Cunha, T. V. R. N. [1] ; Duarte, M. A. H. [1] ; Cavenago, B. C. [1] ; Garcia, R. B. [1] ; Bramante, C. M. [1] ; Bernardineli, N. [1] ; Moraes, I. G. [1]
Total Authors: 9
[1] Univ Sao Paulo, Dept Operat Dent Dent Mat & Endodont, Bauru Dent Sch, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: International Endodontic Journal; v. 44, n. 4, p. 321-329, APR 2011.
Web of Science Citations: 32

P>Aim To compare the percentage of gutta-percha, sealer and voids and the influence of isthmuses in mesial root canals of mandibular molars filled with different techniques. Methodology Canals in 60 mesial roots of mandibular first molars were prepared with ProTaper instruments to size F2 (size 25, 0.08 taper) and filled using a single-cone, lateral compaction, System B or Thermafil techniques. An epoxy resin sealer was labelled with Rhodamine-B dye to allow analysis under a confocal microscope. The percentage of gutta-percha, sealer and area of voids was calculated at 2, 4 and 6 mm from the apex, using Image Tool 3.0 software. Statistical analysis was performed using nonparametric Kruskal-Wallis and Dunn tests (P < 0.05). The influence of isthmuses on the presence or absence of voids was evaluated using the Fisher test. Results At the 2 mm level, the percentage of gutta-percha, sealer and voids was similar amongst the System B, lateral compaction and single-cone techniques. The single-cone technique revealed significantly less gutta-percha, more sealer and voids in comparison with the Thermafil technique at the 2 and 4 mm level (P < 0.05). The analysis of all sections (2, 4 and 6 mm) revealed that more gutta-percha and less sealer and voids were found in root canals filled with Thermafil and System B techniques (P < 0.05). The Fisher test revealed that the presence of isthmuses increased the occurence of voids in the lateral compaction group only (P < 0.05). Conclusion Gutta-percha, sealer filled area and voids were dependent on the canal-filling technique. The presence of isthmuses may influence the quality of root filling. (AU)

FAPESP's process: 09/15233-5 - Influence of the preparation method at root canal obturation by different techniques
Grantee:Marco Antonio Hungaro Duarte
Support Opportunities: Regular Research Grants