Purpose: The aim of this study was to evaluate the apical sealing ability of Total Fill BC sealer and AH Plus sealer with single cone and continuous wave condensation obturation techniques using dye extraction leakage method. Materials and Methods: Eighty-four extracted human single-rooted teeth with round canals were decoronated at 12 mm length and instrumented using crown down technique with the iRace rotary file system to apical file size 40 with 0.04 taper. The roots were randomly divided into four experimental groups (n=20). Group (A1) contained roots which were obturated with Total Fill BC sealer with a single cone. Group (A2) contained roots which were obturated using Total Fill BC sealer with continuous wave condensation. Group (B1) contained roots which were obturated using epoxy resin sealer (AH Plus) with a single cone. Group (B2) contained roots which were obturated using AH Plus sealer with continuous wave condensation. Apical microleakage was assessed with dye extraction method where the absorbance of leaked 1% methylene blue dye was measured using a spectrophotometer. The absorbance values were converted into concentrations, and the data was analyzed using One way ANOVA test. Results: The mean dye concentration values were 0.012, 0.016, 0.011 and 0.015 for Group A1, Group A2, Group B1 and Group B2, respectively. One-way ANOVA indicated no significant difference in dye leakage between the investigated groups (F = 0.938). Conclusion: With the limitation of the study, it was concluded that Total Fill BC was equivalent to AH Plus in apical sealing ability when using single cone or continuous wave condensation. The single cone can provide a similar apical seal of canal filling as can be achieved by using continuous wave condensation methods, in the round canal.
Aim: This study aims to assess the opinion of dental students and interns about the success rates of inferior alveolar nerve block (IANB). Materials and methods:A cross-sectional questionnairebased study was conducted among dental students and interns in the College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia. Before the conduct of the study, ethical approval was taken from the Scientific Research Committee, King Khalid University, Abha. A questionnaire containing two sections was formulated; the 1st section included questions of age, gender, and academic year, while the 2nd section included 10 questions related to IANB.Results: About 70% of the interns and 50.6% of dental students said that they always administered IANB while doing surgical and endodontic procedures in mandibular posterior teeth. When the respondents were asked about their awareness about alternative techniques (such as Gow-Gates technique and Vazirani-Akinosi) to classical IANB, the majority of interns (81.4%) and dental students (82%) were aware about these techniques although only theoretically, while 14.3% of interns and 11.2% of the dental students had practically used these alternative techniques. Conclusion:It was concluded that IANB was the most frequently used technique during various surgical and endodontic procedures. About 52.9% of the interns and 42.7% of dental students had rarely faced IANB failure in clinics. Both the students as well as interns were aware of other alternative techniques, such as Gow-Gates and Akinosi techniques of mandibular block anesthesia although they did not practice these techniques much in their day-to-day practice.Clinical significance: Effective IANB by interns and students for pain-free dentistry.
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