Background: Endodontic irrigants have an important role in endodontic treatment of primary teeth, owing to their complex anatomy. Quercetin is a natural flavonoid that exhibits significant antimicrobial properties. Objective: To evaluate the antimicrobial activity of 0.2% chlorhexidine, 1% (w/v) quercetin, and 2% (w/v) quercetin against endodontic pathogens in primary molars. Materials and methods: A total of 15 patients of 4-7 years of age with nonvital carious primary molars were selected. A sample from the root canal was obtained using number 15 paper point. Antimicrobial activity was measured using the disk diffusion method, for the following solutions: group I: 0.2% chlorhexidine solution, group II: 1% w/v quercetin solution, and group III: 2% w/v quercetin solution. For each sample, microbial culture was done under the microaerophilic condition. After 24 hours, the maximum inhibition zone was recorded in millimeters. Results: The highest inhibition was shown by group I, 13.13 ± 0.74, followed by group III, 12.00 ± 0.65, and the lowest in group II, i.e., 8.53 ± 0.63. On comparison between groups, statistically significant difference was noted. Conclusion: Maximum antimicrobial activity was shown by 0.2% chlorhexidine, followed by 2% quercetin that showed significant antimicrobial activity against endodontic pathogens in primary molars.
Aim: This study set out to compare the damage done to dentin by three distinct titanium file brands -the Hyflex EDM, the ProTaper Next, and the Waveone Gold Nickel -in order to draw conclusions about which one is the most effective.Materials and methods: Forty-first premolars in the mandible with straight canals and single roots were instrumented using Hyflex EDM, Waveone Gold, and Protaper Next. Dentinal flaws after endodontic treatment were studied by sectioning specimens using a hard tissue microtome and analyzing them under a stereomicroscope.Results: There was no discernible variation between the groups in the coronal third (p=0.312) or apical third (p=0.076). Hyflex EDM and Protaper Next differed significantly in the middle portion of the tape (p=0.016). The Hyflex EDM sample had the fewest cracks. There was no statistically significant difference between Hyflex EDM and Waveone Gold; however, Hyflex EDM had fewer fractures in the middle third of the sample than Waveone Gold did. Conclusion: Electric discharge machining (EDM) files made from Hyflex proved to be far superior to their Protaper Next and Waveone Gold counterparts as they induced the fewest cracks in the middle third of the root dentin.
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