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- W2779156770 abstract "Aim: To compare the efficacy of hand and rotary NiTi instruments in removing filling material from curved root canals of endodontically treated teeth with unknown preparation parameters. Methodology: Ninety mandibular molars with curved root canals and a previous endodontic treatment were selected. Root canal curvatures and radii were measured in two directions and micro-CT scans were used to determine preoperative volumes of the filling material. Subsequently, the teeth were assigned to two identical groups (n = 14). The root fillings were removed with Hedström files or FlexMaster NiTi rotary instruments. Postoperative micro-CT imaging was used to assess the percentage of residual filling material as well as the amount of dentine removal. Working time and procedural errors were recorded. Data were compared using analysis of covariance and analysis of variance procedures. Results: Root canals retreated with Hedström files showed significantly less remaining filling material compared with FlexMaster instruments (P < 0.05). Both retreatment techniques removed similar amounts of dentine with no significant differences (P > 0.05). FlexMaster instruments were significantly faster than Hedström files (P < 0.05). No procedural errors were detected in the Hedström group while three instruments fractured in the FlexMaster group. Conclusions: Hand instrumentation resulted in significantly less residual filling material than retreatment with rotary NiTi instruments. Dentine removal was not significantly different for both techniques. FlexMaster NiTi rotary files were significantly faster than Hedström files, but showed a higher risk of instrument fracture." @default.
- W2779156770 created "2018-01-05" @default.
- W2779156770 creator A5061160170 @default.
- W2779156770 date "2022-02-20" @default.
- W2779156770 modified "2023-10-01" @default.
- W2779156770 title "In-vitro-Vergleich zweier verschiedener Techniken zur Revision von Wurzelkanalfüllungen in gekrümmten Wurzelkanälen - Eine Micro-Computertomografie-Studie" @default.
- W2779156770 doi "https://doi.org/10.53846/goediss-1662" @default.
- W2779156770 hasPublicationYear "2022" @default.
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