ABSTRACT
INTRODUCTION: Endodontic failure resolves after complete removal of obturating material followed by disinfection, cleaning, shaping and three-dimensional obturation. MATERIALS AND METHODS: Seventy single-rooted mandibular premolars, with single oval-shaped root canal were included. They were decoronated at a length of 16 mm from the apex. Shaping and cleaning were performed, and obturation was done using the warm lateral compaction technique. The teeth were divided into seven groups according to retreatment procedures (Hand files; ProTaper Universal retreatment files; MTwo® Retreatment system; R-Endo® Retreatment system; ProTaper Universal retreatment files with solvent and ultrasonics; MTwo® R with solvent, and ultrasonics and R-Endo® with solvent and ultrasonics). The data were obtained and subjected to the statistical analysis. RESULTS: All instrumentation techniques left obturating material with least in Group 6 and maximum Group 5. The mean time taken for complete retreatment procedure was minimum in Group 2 and maximum with Group 1. CONCLUSION: MTwo® R with solvent and ultrasonics, R-Endo®, and R-Endo® with solvent and ultrasonics were effective in gutta-percha removal from coronal third, middle third, and apical third, respectively. Significance: Nonsurgical endodontic retreatment using rotary files helps in gaining access to infected teeth. During retreatment procedure, this helps disinfectant to reach in critical areas of the root canal system, thereby decreasing the microbial load, leading to achieve healthy periradicular tissues.
ABSTRACT
BACKGROUND: Herbal agents are used for treating different forms of diseases since decades. In the current study, the antiadhesive property of herbal extracts has been evaluated using Glycyrrhiza glabra (GG) and Terminalia chebula (TC) herbal extracts on Streptococcus mutans. MATERIALS AND METHODS: The plant extracts (GG and TC) were powdered in mechanical grinder. Ten gram of each plant extract in powder form was placed in porous bag or thimble. The extract was placed in a round-bottom flask and was transferred into clean preweighed universal tubes. The yield strength of the extract was calculated. The antiadherence property of the herbal extract was evaluated using glass surface adherence test. STATISTICAL ANALYSIS: The statistical analysis was done using one-way analysis of variance followed by post hoc Tukey's test. RESULTS: Both herbal extracts have significant antiadhesive and antimicrobial activity against S. mutans, however, high antiadherence property was seen with TC than GG. CONCLUSION: Both the plant extracts exhibit inhibitory activity against S. mutans. However, TC had more clinically significant results than GG, but it was found statistically insignificant.
ABSTRACT
BACKGROUND: Pulpal infections are caused by varied number of organisms and are located in various sites of root canal system. Thus, the success of root canal treatment depends on complete eradication of microbiota. MATERIALS AND METHODS: Thirty-two patients were selected and divided into four groups (photoactivated disinfection [PAD], diode laser, 5% sodium hypochlorite [NaOCl], and normal saline). The treatment was done according to groups, following manufacturer's instructions. The efficacies of groups were evaluated using microbial culturing technique. Three samples were taken for each group and were incubated separately for aerobic and anaerobic culture. Microbial counting was done for each sample in the form of colony-forming units. RESULTS: It was evaluated using two-way analysis of variance and Friedman test. All the groups showed reduction in number of bacteria. However, for group A P < 0.0001 when analyzed for aerobic and anaerobic microorganisms, whereas, with Group B and C, P < 0.0001 for aerobic microorganisms. CONCLUSION: PAD, diode laser, and 5% NaOCl showed antibacterial action against aerobic and anaerobic bacteria.
