ABSTRACT
AIM: To evaluate and compare canal-centering ability (CCA), canal transportation (CT), and dentinal crack formation by using Hyflex-electrical discharge machining (EDM), OneShape, WaveOne Gold, and Reciproc single file system in the mesiobuccal root of maxillary first molar at coronal, middle, and apical third using cone-beam computed tomography (CBCT) and scanning electron microscopy (SEM). MATERIALS AND METHODS: Mesiobuccal roots of 120 freshly extracted maxillary molar teeth were divided into four experimental groups; Hyflex-EDM, OneShape, WaveOne Gold, and Reciproc (n = 30/group). Preinstrumentation scanning was done using CBCT for all samples at coronal one-third (4 mm), middle one-third (8 mm), and apical one-third (12 mm). After cleaning and shaping with standard irrigation protocol, the specimens were again scanned. Canal-centering ability and CT were calculated using pre- and postinstrumentation CBCT values. A scanning electron microscope was used to identify dentinal crack formation. RESULTS: No significant difference was found for CCA by any of the systems at coronal, middle, and apical third, respectively. However, OneShape was found to have better CCA at the coronal third and WaveOne Gold at the middle and apical third. There was a significant difference in canal transportation at the apical third (p = 0.004) with WaveOne Gold having the least CT followed by Reciproc at the apical third. OneShape resulted in more dentinal cracks in the coronal and middle thirds. Also, Hyflex-EDM was better in the apical third. CONCLUSION: No difference in CCA was observed between the groups. The lowest values for CT were obtained for WaveOne Gold (similar to Reciproc) whereas both rotary files showed higher values for CT. Also, OneShape showed the most dentinal at all levels. Furthermore, Hyflex-EDM and WaveOne Gold produced the least dentinal cracks at all levels. CLINICAL SIGNIFICANCE: Given that the Reciprocating file system had the least CT and least dentinal cracks, the clinical success rate of root canal treatment (RCT) with the Reciprocating file system can be a better choice to improve the longevity of root canal-treated teeth.
Subject(s)
Dental Pulp Cavity , Root Canal Preparation , Dental Pulp Cavity/diagnostic imaging , Molar/diagnostic imaging , Root Canal Preparation/methods , Root Canal TherapyABSTRACT
Background: The objective of study was to assess the knowledge and awareness of the management of biological waste (BMW) among undergraduate students of Dental College, Tamilnadu state. Materials and Methods: Among the students of Dental College in Tamilnadu state, India, a cross-sectional observational research was conducted. A pre-designed questionnaire was distributed to the students. Their expertise and awareness of managing biomedical waste were the variables that were investigated. Results: One hundred and eighty students were participated. The male to female ratio was 1:2, and the average age of responders was 19.76 ± 1.03 years. When it comes to information concerning the management of biomedical waste, an average of 60.33% were correct and 39.57% were incorrect. For their knowledge of the same, 81.35% were correct and 18.65% were incorrect. Conclusion: The findings indicated that students had a high degree of knowledge and understanding regarding the management of biomedical waste.
