[This corrects the article on p. 420 in vol. 22, PMID 33082655.].Ideal coronal restoration that provides satisfactory esthetic and functional outcome for endodontically treated and extensively damaged teeth is still an arduous task for restorative dentistry. None of the available post systems have all the ideal biological and mechanical properties. HCQ inhibitor molecular weight Biological dentin posts are considered as a good alternative to conventional post systems as they preserve dentin walls, which results in better distribution of forces along the root surfaces in the compromised tooth. This case report is an attempt to detail “autogenous dentin post” which serves as a homologous unit for the reinforcement of endodontically treated tooth by virtue of its biomimetic property.Root canal stenosis and external inflammatory root resorption are potential consequence of trauma that can occur depending on the severity of the injury. Luxation injuries induce reduced blood supply to the pulp, which leads to calcification/narrowing of root canals leading to root canal stenosis. External inflammatory cervical resorption occurs when there has been the loss of cementum due to damage to the external surface of tooth root during trauma, plus root canal system becoming infected with bacteria. External inflammatory resorption can ultimately lead to loss of tooth if it is not managed in a timely manner. The treatment should aim toward the complete suppression of all tissues undergoing resorption and the reconstruction of the resorptive defect by the placement of a suitable bioactive material. This case report presents the management of root canal stenosis in the maxillary left central incisor in 35-year-old female and management of Class IV external invasive cervical and apical inflammatory resorption in maxillary right central incisor, both of which were diagnosed with the help of cone-beam computed tomography scan. The treatment of external inflammatory resorption included surgical excision of granulation tissue and root reconstruction with Biodentine. Twelve months follow-up showed successful outcomes for both the teeth treated for root canal stenosis and external invasive inflammatory resorption leading retention of the traumatized teeth with otherwise poor prognosis.

The aim of this study is to evaluate and compare the antibacterial efficacy of

, and 5% sodium hypochlorite against

.

Herbal extracts of

and

were prepared. Tryptone soya broth was used to grow

and agar plates were prepared. The tested solutions (Group A 5% NaOCl, Group B 20%

, Group C 12.5%

, Group D 10%

, Group E 10%

) were added to the wells made on agar media. Agar diffusion test was performed. Plates were incubated at 37°C for 24 h. Bacterial zones of inhibition were recorded.

The data were analyzed statistically by Analysis of Variance (ANOVA) and

comparison by Tukey’s

-test. The highest zone of inhibition against

was shown by 5% NaOCl, followed by 10%

, 20%

and 10%

showed similar comparable antibacterial activity. The least zone of inhibition was showed by S. persica.

5% NaOCl showed the maximum antibacterial activity, and herbal products demonstrated significant antibacterial activity against

and can be employed as an alternative to NaOCl.

5% NaOCl showed the maximum antibacterial activity, and herbal products demonstrated significant antibacterial activity against E. faecalis and can be employed as an alternative to NaOCl.

Endodontic failure resolves after complete removal of obturating material followed by disinfection, cleaning, shaping and three-dimensional obturation.

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.

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.

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.

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.

The aim is to compare the effects of diode laser, GC tooth mousse, and sodium fluoride (NaF) varnish on dentinal hypersensitivity by scanning electron microscopic (SEM) evaluation.

Forty extracted human maxillary first premolar teeth were selected to prepare dentin disc of 2 mm thickness. The specimens were divided into four groups of 10 discs each-Group 1 Negative control, Group 2 Diode laser, Group 3 GC tooth mousse, and Group 4 NaF varnish. Diode laser and NaF was exposed on dentin disc for three consecutive days. GC tooth mousse was applied twice a day for 1 week. All the specimens were examined under SEM at a magnification of ×1500. The standardized SEM microphotographs were analyzed according to the scoring criteria.

Friedman test with

Wilcoxon sign rank test for pair wise comparison at different time intervals within the group was computed using SPSS version 20. A

< 0.05 was regarded as statistically significant.

The results showed that the use of diode laser was able to achieve complete occlusion of dentinal tubules followed by the use of GC tooth mousse and that of NaF varnish while control group showed completely open tubules.