Synchrotron radiation-based micro-computed tomographic analysis of apical transportation of different Nickel–Titanium rotary systems in curved root canals An in vitro study

Background: In the last few decades, the availability of synchrotron sources has initiated revolutionary advances in X-ray imaging. Aims: The study aimed to evaluate the incidence of apical transportation after root canal preparation with ProTaper Gold (PTG), Hyflex electro discharge machining (HEDM), Reciproc (RPC), and WaveOne Gold (WOG) using synchrotron radiation-based micro-computed tomographic (SR–?CT) analysis. Materials and Methods: Forty mandibular molars were assigned to four experimental groups (n = 10) according to the file system used for the root canal preparation: Group 1: PTG (25/0.08), Group 2: HEDM (25/0.08), Group 3: RPC (25/0.08), and Group 4: WOG (25/0.07). The specimens were scanned on SR–?CT system before and after the root canal preparation. Apical transportation was assessed at 1, 2, 3, 4, and 5 mm section. Statistical Analysis: Two-way analysis of variance and Wilcoxon Mann–Whitney test was used. Results: No significant difference was found between the groups. Transportation in the mesial direction was of greater magnitude than distal transportation for all the files systems. Conclusion: SR–?CT can be used as a reliable diagnostic tool for further implications.

Management of Single Rooted Mandibular First Molar A Rare Entity –A CBCT Analysis

The case report here tries to describe the rare variation of root canal morphology in a mandibular first molar, which is rare in occurrence in literature. This case report presents a relatively rare case of mandibular first molar with single root and a single root canal in a 24-year-old female patient.. Cone-beam computed tomography (CBCT) was employed to confirm the extension of the unusual anatomy. Ambiguity in the canal morphology of the first molar is quite common. Knowledge of variations in internal anatomy of teeth is important for success in endodontic treatment. Root canal morphology is limitless in its variability and clinicians must be aware that anatomic variations constitute a formidable challenge to endodontic success. Hence, clinicians have to take utmost care when these cases with single canal and single root come in our practice.