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- Title
Micro-CT evaluation of the efficacy of hard-tissue removal from the root canal and isthmus area by positive and negative pressure irrigation systems.
- Authors
Versiani, M. A.; Alves, F. R. F.; Andrade‐Junior, C. V.; Marceliano‐Alves, M. F.; Provenzano, J. C.; Rôças, I. N.; Sousa‐Neto, M. D.; Siqueira, J. F.
- Abstract
Aim To evaluate the removal of accumulated hard-tissue debris ( AHTD) from the root canal system of mandibular molars by positive and negative pressure irrigation systems, using micro- CT imaging analysis. Methodology Mandibular molars with a single canal in the distal root and 2 canals connected by an isthmus in the mesial root were matched based on similar morphological dimensions using micro- CT evaluation and assigned to 2 experimental groups ( n = 20 mesial and 10 distal canals), according to the irrigation protocol: apical positive (conventional irrigation) or negative (EndoVac system) pressure. Changes in root canal volume and surface area as well as percentage of uninstrumented canal wall surface and accumulated hard-tissue debris ( AHTD) after canal preparation were compared statistically using the independent sample t-test and Mann-Whitney U-test, with the significance level set at 5%. Results Volume, surface area and percentage of static voxels in either mesial or distal root canal systems were not significantly different between groups before or after root canal preparation ( P > 0.05). After preparation, AHTD was not observed in the distal canal of both groups. However, in the mesial root canal system, the conventional irrigation group was associated with a significantly higher median percentage of AHTD (11.48%; IQR: 5.9-22.6; range: 1.86-41.98) than the EndoVac group (3.40%; IQR: 1.5-7.3; range: 0.82-12.84) ( P < 0.05). Conclusions Neither irrigation protocol succeeded in rendering the mesial canal system free of AHTD; however, apical negative pressure irrigation resulted in lower levels of AHTD than conventional irrigation.
- Subjects
ROOT canal treatment; IRRIGATION (Medicine); MANDIBLE; MOLARS; DENTAL debris (Surgery); EXPERIMENTAL groups
- Publication
International Endodontic Journal, 2016, Vol 49, Issue 11, p1079
- ISSN
0143-2885
- Publication type
Article
- DOI
10.1111/iej.12559