Abstract
BackgroundThe purpose of this study was to evaluate the changes in canal volume after root canal preparation in vivo with 3 different single-file techniques (Reciproc-Blue®, WaveOne-Gold® and XP-EndoShaper®), with a new method using CBCT and 3D reconstruction.MethodsIn this prospective study, thirty human lower premolars from healthy patients were used, in which extraction was indicated for orthodontic reasons. All the teeth used were caries- and restoration-free with complete root development, without signs of periodontal disease or traumatic occlusion, and with only one straight canal (up to 25º curvature). Teeth were randomly divided into three different groups: Reciproc-Blue, WaveOne-Gold and XP-EndoShaper. CBCT scans before root canal preparation were used to create a 3D reconstruction with RHINOCEROS 5.0 software to assess the initial canal volume, and then compared with 3D reconstructions after canal preparation to measure the increase in canal volume. Student’s t test for paired data were used to determine statistically significant differences between the before and after canal volumes. Anova test was used to determine statistically significant differences in the percentage of canal volume increase between the groups and Tukey's post-hoc test were used to paired comparison.ResultsReciproc-Blue showed the higher increase in canal volume, followed by WaveOne-Gold and XP-EndoShaper (p = 0.003). XP-EndoShaper did not show a statistically significant increase in canal volume after root canal preparation (p = 0.06).ConclusionWith this model, Reciproc-Blue showed higher increase in root canal volume, followed by WaveOne-Gold, while XP-EndoShaper did not significantly increase root canal volume during preparation.
Highlights
The purpose of this study was to evaluate the changes in canal volume after root canal preparation in vivo with 3 different single-file techniques (Reciproc-Blue®, WaveOne-Gold® and XP-EndoShaper®), with a new method using cone-beam computed tomography (CBCT) and 3D reconstruction
Optimal endodontic preparation aims to preserve the original morphology of root canals, respecting the size and spatial position of the apical foramen [1]
The internal cross-section anatomy of root canals has different shapes and sizes, being oval shapes the most common at the cervical and middle thirds, while rounded shapes are more common at the apical third
Summary
The purpose of this study was to evaluate the changes in canal volume after root canal preparation in vivo with 3 different single-file techniques (Reciproc-Blue®, WaveOne-Gold® and XP-EndoShaper®), with a new method using CBCT and 3D reconstruction. Optimal endodontic preparation aims to preserve the original morphology of root canals, respecting the size and spatial position of the apical foramen [1]. Operative procedural errors, such as over instrumentation and poor. The internal cross-section anatomy of root canals has different shapes and sizes, being oval shapes the most common at the cervical and middle thirds, while rounded shapes are more common at the apical third These variations in the internal anatomy of the canal makes cleaning and disinfecting difficult [5, 6]. The shaping ability of NITI rotary files in oval-shaped canals is still a main endodontic concern, since unprepared root canal areas harbor necrotic endodontic tissue or microbial biofilms, risking the treatment outcome [9]
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