The Effect of the NRT Files Instrumentation on the Quality of the Surface of the Root Canal Wall
| Autor: | Chiara Baroni, Pier Paolo Cirulli, Chiara Pirani, Alessio Buonavoglia, Stefano Chersoni |
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| Přispěvatelé: | Chiara Pirani, Alessio Buonavoglia, Pier Paolo Cirulli, Chiara Baroni, Stefano Chersoni |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
file Surface Properties Instrumentation Root canal Biomedical Engineering Biophysics Smear layer Dentistry Bioengineering Biomaterials medicine Humans Root Canal Irrigants business.industry endodntic NITI INSTRUMENTS Sem analysis General Medicine medicine.anatomical_structure Smear Layer Coronal plane Microscopy Electron Scanning Dental Pulp Cavity business SEMANALYSIS Root Canal Preparation |
| Zdroj: | Journal of Applied Biomaterials & Functional Materials. 10:136-140 |
| ISSN: | 2280-8000 |
| Popis: | Purpose To analyze in vitro, trough scanning electron microscope (SEM), the shaping ability of NRT NiTi rotary system (Mani, Inc, Toshigi-Ken, Japan). Methods Ten extracted human teeth were cut at the level of the CEJ and prepared with Gates-Glidden burs 4-3-2 and NRT rotary files up to size #35. Irrigation was performed with 7.5 mL of 5% NaOCl and 7.5 mL of 10% EDTA during each canal instrumentation. Following the shaping sequence, a final irrigation was performed with EDTA followed by NaOCl, each left in situ for three minutes. Teeth were then fractured longitudinally, and the coronal, middle, and apical thirds of the canals were inspected with SEM. Three parameters, divided into four different levels (Alfa and Bravo, considered clinically acceptable; Charlie and Delta, considered clinically unacceptable), were used to score the canal morphology: presence and amount of smear layer; presence of organic and inorganic debris; surface profile. Results SEM assessment revealed that in the coronal and middle third the majority of canals shaped with NRT rotary system presented a clinically acceptable surface. The apical third presented a higher amount of smear layer and dentinal debris instead, compared to the coronal and middle third. Conclusions NRT files demonstrated that they provided good instrumentation of the coronal and middle third, while being unable to obtain a defects-free surface in the apical third. |
| Databáze: | OpenAIRE |
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