IntroductionKnowledge of blood groups and their association with oral diseases and depression is very important, as it may help in early diagnosis and treatment strategies.MethodA cross sectional descriptive study was conducted among dental students of a private dental college. The study was conducted in two phases, in the first phase the blood samples of each student were collected and sent for blood group examination in laboratory. Data for oral health status was collected by recording oral hygiene, dental caries and questions regarding oral hygiene habits and adverse oral habits. Depression level was recorded using a pre-validated, 21 item close ended questionnaire. Data thus collected was subjected to statistical analysis using chi-square and frequency distribution test using SPSS software.ResultsThe total study subjects were 315, 95 males and 220 females. On applying chi-square test between blood group and Decayed, Missing and Filled Teeth (DMFT) score, a highly significant association (p=0.00) was observed. A non-significant association p=0.217 and p=0.668 was observed between gender and DMFT and Oral hygiene index-simplified and Blood group respectively. When comparing blood group and Depression score, a non-significant association (p=0.74) was observed.ConclusionDMFT score varies in different blood groups and this might suggest a positive association between blood groups and DMFT score, while depression, oral hygiene and gender might not be affected by the different blood groups.

Aim: The aim of the study was to compare the sealing ability of Mineral Trioxide Aggregate (MTA) and Retroplast as root end filling materials using the Rhodamine B dye penetration method in vitro. Methodology: Forty freshly extracted human single-rooted teeth were randomly divided into two groups of 20 teeth each, and standard root-end cavities were prepared in all teeth. The cavities were filled with MTA and Retroplast in groups 1 and 2, respectively. The specimens were then stored in 1% Rhodamine B dye for a week, following which the dye penetration with all samples was analysed under a stereomicroscope and scored according to Tronstad's criteria. The observations were compared with Chi square test at a 0.220 level of significance. Results: 5% of the samples in both the groups showed no significant leakage. The leakage was deeper with the Retroplast group than with the MTA group; however, there was no statistically significant difference between the two groups. Conclusion: Both MTA and Retroplast are similar in their sealing potential as root-end cavity fillings with Retroplast reporting slightly deeper microleakage than MTA within the limits of the present study.

Human mandibular premolars gained popularity as they have complex root and root canal morphology. Multiple roots and canals are more common in mandibular first premolars when compared to mandibular second premolars. The occurrence of three root canals and separate foramina in mandibular second premolars is not common. In this case report, endodontic management of a three-rooted mandibular second premolar is discussed.

<p class="Default">The main objective of root canal treatment is thorough mechanical and chemical cleansing of the entire pulp space followed by complete obturation with an inert filling material. These molars normally have two roots, one mesial and one distal, and their usual canal distribution is two in the mesial root and one or two in the distal root. This clinical case reports and review of literature describes the management of the mandibular molar with three separate mesial canals including middle mesial canal.</p>