Dentigerous cyst is a developmental odontogenic cyst, which apparently develops by accumulation of fluid between the reduced enamel epithelium and the tooth crown of an unerupted tooth. There is usually no pain or discomfort associated with the cyst unless there is acute inflammatory exacerbation. Management of dentigerous cyst in primary dentition needs special consideration regarding the preservation of the developing permanent tooth buds. Here, we report a case of dentigerous cyst in primary dentition in a 10-year-old male patient and its management.

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Objective: To compare and evaluate the fracture resistance of endodontically treated molars reinforced with various bonded restorations and to study the type of fractures in various restorations. Methods: Forty extracted mandibular molars were endodontically treated. MOD (Mesio-Occluso-Distal) cavities were prepared and Mesio-Buccal cusp was reduced in all to provide cuspal coverage. All the teeth were then divided into 4 groups. The cavities in group 1(control) were filled with high copper amalgam. Group 2 was restored with direct resin composite. In group 3 after the priming and bonding procedures as in group 2, cavity surfaces were coated with flowable resin composite. Before curing a piece of polyethylene ribbon fiber was cut and coated with adhesive resin and was embedded inside the flowable composite. The resin composite was cured with visible light cure (VLC) gun. For group 4, restorations were done according to the recommendations provided by the manufacturers of SR Adoro (Ivoclar-Vivadent, Schaan, Liechtenstein) composite material. Compressive fracture strength test was performed after at least 24 hours of the fabrication of the specimens, by application of compressive loading in a Universal testing machine, applied on the occlusal aspect of each specimen with a steel bar. The mean loads necessary to fracture were recorded in Newton and the results were statistically analyzed. Results: Group 4 (indirect composite inlay) had the greater fracture resistance and group 1(Amalgam) had the poorest. Difference between group 1 and 3, group 1 and 4, group 2 and 4 were statistically significant. No statistically significant difference was found between group 1 and 2, group 2 and 3, group 3 and 4. Predominant type of fracture in group 1 and 3 was fracture of tooth below cemento enamel junction at tooth restoration interface without mesio buccal cusp involvement. In group 2 and 4, predominant fractures were of tooth below cemento enamel junction through center of restoration without mesio–buccal cusp involvement.

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Background:The strength of endodontically treated teeth depends on the remaining amount of tooth structure after canal preparation. Epoxy resin sealers like AH Plus was found to bond better to the core obturation material and root dentine. Hence, the present study was conducted with the aim of assessing the efficacy of root canal sealers in obturated root canals. Materials & methods:A total of 30 freshly extracted mandibular first premolars were collected and enrolled. Decoronation of all the specimens was done. Random division of all the samples was done in three study groups with ten specimens in each group as follows: Group 1: AH Plus sealer, Group 2: Tubliseal sealer, and Group 3: FUJI -1 sealer. Obturation was carried out using the single-cone technique. Stereoscopic examination of the internal aspects of the sealer coated canals was done, followed by a calculation of the total percentage of the sealer-coated perimeter of the canal.Results: Mean percentage of the sealer coated perimeter of the canal among group 1 specimens, group 2 specimens and group 3 specimens was 95.45%, 98.28% and 91.11%, respectively. While analyzing statistically, it was seen that the highest percentage of sealer coated perimeter was found to be of Tubliseal and lowest for FUJI-1, the results of which were found to be statistically significant. Conclusion:Highest percentage of sealer coated perimeter was found to be of Tubliseal and lowest for FUJI-1.

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