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ENDO - Endodontic Practice Today

Edited by Antionio Bonaccorso, Bun San Chong, Edgar Schafer, and Luc van der Sluis

Official Publication of the Belgian Association for Endodontology and Traumatology (BAET), the French Society of Endodontics (SFE) and the Norwegian Endodontic Society (NEF)

ISSN (print) 1753-2809 • ISSN (online) 1753-2817


Spring 2013
Volume 7 , Issue 1

Pages: 41-46
Share Abstract:

Quality of root canal fillings performed by inexperienced operators in oval-shaped canals

Vieira, Márcia V. B. / Lopes, Weber S. P. / Neves, Monica A. S. / Gama, Tulio G. / Moreno, Jaime O. / Rocas, Isabela N. / Siqueira Jr, José F. / Armada, Luciana / Alves, Flavio R. F.

Objective: To evaluate the percentage of filled area of oval-shaped root canals.
Materials and methods: Thirty-four mandibular incisors, 42 mandibular premolars and 50 mandibular molars (distal roots only) (n = 126 teeth) were resected 1 and 5 mm from the apex and the cross sections evaluated. All treatments were performed by undergraduate students, who were not aware of the cross-sectional shape of the canal. Obturation was performed using the lateral compaction technique of gutta-percha with sealer.
Results: The findings demonstrated that although all treated root canals were oval-shaped at 5 mm short, the vast majority of them were round at the 1-mm level. The percentage of the total filling area at the 1-mm level was 79% (range: 20-100%) for incisors, 89% (range: 46-100%) for premolars, and 97% (range: 60-100%) for the molar distal root. Correspondent values for the 5-mm level were 92% (range: 52-100%) for incisors, 99% (range: 86-100%) for premolars, and 96% (range: 78-100%) for molars. Gutta-percha was always the major component of the filling mass. At the 1-mm level, the mean proportion of gutta-percha ranged from 66% to 79%, while at the 5-mm level it ranged from 62.5% to 76%.
Conclusion: The findings confirmed that the quality of the root canal filling is compromised in ovalshaped canals, and suggested that this may be more likely a limitation of the technique than a matter of the operator’s expertise.

Keywords: endodontic treatment, gutta-percha, lateral compaction technique, oval root canals, pre- clinical training, root canal filling

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