Micro-computed tomography study of oval-shaped canals prepared with the self-adjusting file, Reciproc, WaveOne, and ProTaper universal systems. Changes in root canal geometry after preparation assessed by high-resolution computed tomography. All three groups evaluated in this study proved to be safe for the preparation of moderately curved root canals. Centering ratios and transportation values were more favorable in the apical region after use of TEF. Combined results showed that TEF was significantly moreĬentered than TWOG but similar to TOFG (P = 0.017). Apically, TEF remained significantly more centered with significantly lower transportation values than TWOG and TOFG (P < 0.05). Transportation values for TEF and TWOG were similar (P = 0.98) at the midroot level but significantly lower than TOFG (P = 0.04). Transportation values were similar at the coronal level and for the combined mean values (P > 0.05). There were no significant differences in centering ratios at the coronal and midroot levels (P > 0.05). Pre- and post-preparation micro-CT scans were compared at levels 7 mm (coronal), 5 mm (midroot), and 3 mm (apical) from the apex to evaluate transportation and centering ratios. The canals were randomly divided into three groups for glide path preparation and shaping (n = 20): Group TWOG (WaveOne Gold Glider + Primary WaveOne Gold) Group TEF (Edge GlidePath + Primary EdgeOneįire) and Group TOFG (One File G Reciprocating Glide Path File + Primary Shaping file). Radiographs were used to select sixty untreated mesiobuccal canals with curvatures of 25° to 35° from extracted, human, mandibular molars. The aim of this study was to evaluate and compare canalcentering ability and transportation of three analogous reciprocating shaping instruments after glide path preparation.
WAVE ONE ENDO SEQUENCE MANUAL
CONCLUSIONS: Neither the manual instruments nor the PathFile or Mtwo rotary instruments used to create a glide path had any influence on the occurrence of apical transportation or produced any canal aberration.Department of Odontology, School of Dentistry, University of Pretoria, Pretoria, South Africa.ĭepartment of Odontology, School of Dentistry, University of Pretoria, Pretoria, South Africa RESULTS: No apical transportation or aberration in root canal morphology occurred in any of the teeth therefore, no statistical analysis was conducted. The specimens were analyzed by 3 evaluators, whose calibration was checked using the Kendall agreement test. The initial and final images of the central axis of the canals were compared by superimposition through computerized analysis and with the aid of magnification. The double digital radiograph technique was used, pre- and postinstrumentation, to assess whether apical transportation and/or aberration in root canal morphology occurred. The specimens were divided randomly into 3 groups with 15 canals each, and canal preparation was performed by an endodontist using #10-15-20 K-type stainless steel manual files (group M), #13-16-19 PathFile rotary instruments (group PF), and #10-15-20 Mtwo rotary instruments (group MT). METHODS: The mesial canals of 45 mandibular first and second molars (with curvature angles between 25° and 35°) were selected for this study.
The goal of this study was to evaluate the occurrences of apical transportation and canal aberrations produced with different instruments used to create a glide path in the preparation of curved root canals, namely manual K-files (Dentsply Maillefer, Ballaigues, Switzerland) and PathFile (Dentsply Maillefer) and Mtwo (Sweden and Martina, Padua, Italy) nickel-titanium rotary files.
Nickel-titanium rotary instruments reduce procedural errors and the time required to finish root canal preparation.
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