Effects of preparation with the Self‐Adjusting File, TRUS hape and XP ‐endo Shaper systems, and a supplementary step with XP ‐endo Finisher R on filling material removal during retreatment of mandibular molar canals
| Autor: | André Guimarães Machado, José C. Provenzano, Bianca P.S. Guilherme, Mônica A.S. Neves, Marília F. Marceliano-Alves, J. F. Siqueira, Lucio Souza Gonçalves |
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| Rok vydání: | 2018 |
| Předmět: |
Molar
Materials science business.industry Root canal Micro computed tomography 0206 medical engineering Dentistry Material removal 030206 dentistry 02 engineering and technology Material volume 020601 biomedical engineering 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure medicine Total removal business General Dentistry Mandibular molar |
| Zdroj: | International Endodontic Journal. 52:709-715 |
| ISSN: | 1365-2591 0143-2885 |
| Popis: | AIM To compare the effects of three instrumentation systems, and a supplementary approach with a finishing instrument, on filling material removal during retreatment of mandibular molar canals. METHODS Sixty mesial canals from mandibular molars (Vertucci's type IV anatomy) were instrumented, filled and subjected to retreatment. After initial removal of the root canal filling material using the D-RaCe system, the canals were randomly distributed into three groups (n = 20) according to the instrument system used for preparation: the Self-Adjusting File (SAF), TRUShape or XP-endo Shaper. The filling material volume in the apical 5 mm of the canals was assessed by means of micro-computed tomography (micro-CT) before and after retreatment. All specimens with residual filling material were subjected to a supplementary approach with the XP-endo Finisher R instrument and another micro-CT scan was taken. Data on the volumes of filling material and incidence of total removal were compared between groups by the general linear model for paired data and the Fisher's exact test. The effects of the refinement step were evaluated by the Wilcoxon Signed Ranks test. RESULTS The amount of removed material was 92.4%, 96.9% and 96.9% for the SAF, TRUShape and XP-endo Shaper, respectively. There were no significant differences between them (P > 0.05). Canals were completely cleaned of filling material in 70% of the specimens for XP-endo Shaper, 55% for SAF and 30% for TRUShape; the difference between XP-endo Shaper and TRUShape was significant (P = 0.03). The supplementary step with the XP-endo Finisher R instrument was associated with additional filling material removal of 38% (P |
| Databáze: | OpenAIRE |
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