Disinfecting and Shaping Type I C-shaped Root Canals: A Correlative Micro-computed Tomographic and Molecular Microbiology Study
| Autor: | Aida Meto, Flávio R.F. Alves, Patricia Olivares, Marília F. Marceliano-Alves, José F. Siqueira, Isbelia Gazzaneo, Isabela N. Rôças, Pablo Andrés Amoroso-Silva, Ibrahimu Mdala, Juan Pacheco-Yanes |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Structure model index business.industry Micro computed tomography Dentistry 030206 dentistry X-Ray Microtomography Bacterial counts Molar Computed tomographic Mandibular second molar Disinfection 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology 0302 clinical medicine chemistry Molecular microbiology Sodium hypochlorite Dental Pulp Cavity business General Dentistry Root Canal Preparation Mathematics |
| Zdroj: | Journal of endodontics. 47(4) |
| ISSN: | 1878-3554 |
| Popis: | This ex vivo study compared the disinfection and shaping abilities of 2 preparation protocols in C-shaped canals.Mandibular second molars with type I C-shaped canals were pair matched based on micro-computed tomographic (micro-CT) analysis and distributed into 2 groups. The canals were contaminated with a mixed bacterial culture and prepared using 2 protocols, both with 2.5% sodium hypochlorite irrigation: XP-endo Shaper (FKG Dentaire, La Chaux-de-Fonds, Switzerland) supplemented with XP-endo Finisher (FKG Dentaire) (XP-E) and BioRaCe (FKG Dentaire) supplemented with a Hedström file (Dentsply/Sirona, Tulsa, OK) (BR-Hed). Micro-CT scans and intracanal bacteriologic samples were taken before (scan #1 and sample 1) and after preparation (scan #2 and sample 2) and after the supplementary step (scan #3 and sample 3). Canal shaping was evaluated by micro-CT imaging, and disinfection was assessed by quantitative polymerase chain reaction.Micro-CT data from the XP-E (n = 21) and BR-Hed (n = 23) protocols revealed no significant differences between groups regarding shaping parameters (canal volume, surface area, structure model index, and prepared walls) after preparation and after the supplementary step (P.05). All these parameters significantly increased after each preparation step (P.05), except for structure model index changes after the XP-endo Finisher (P.05). Bacteriologic data from the XP-E (n = 21) and BR-Hed (n = 22) groups showed that 14 (66.7%) and 10 (45.5%) S2 samples still had detectable bacteria, respectively. The corresponding figures for supplementary steps with the XP-endo Finisher and Hedström file were 11 (52.4%) and 10 (45.5%), respectively. Bacterial counts in sample 1 significantly decreased in samples 2 and 3 in both groups (P.01). Intragroup comparison between sample 2 and sample 3 showed a 66% reduction in counts after using the Hedström file and 18% after using the XP-endo Finisher (P.05 for both groups). The quantitative bacterial reduction was not different between groups (P.05).The XP-endo Shaper and BioRaCe systems have similar disinfecting and shaping abilities in C-shaped canals. Supplementary steps with the Hedström file and the XP-endo Finisher were similarly effective in improving shaping, but this was not sufficient to enhance disinfection. About half of the cases, in both groups, still harbored detectable amounts of bacteria. |
| Databáze: | OpenAIRE |
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