ABSTRACT
The aim of this study was to compare and evaluated the influence of post space preparation on the marginal integrity of MTA root end restoration. Methodology: 60 Freshly extracted human maxillary anterior teeth were collected, and decoronated to obtain a uniform root length of 14mm. Cleaning, shaping and obturation of root canals was performed. These teeth were then randomly divided into three groups of twenty each. In Group I, post space preparation was followed by retrograde preparation and restoration by MTA. In Group II, firstly root end cavity preparation and restoration was done. Post space preparation was done after the completion of above procedures. Group III, served as positive control. These samples were covered with fingernail polish and immersed in 0.2% rhodamine B dye for 48 hours. The specimens were sectioned longitudinally using a diamond disc to measure dye penetration under stereomicroscope. Results revealed that, Group I, showed minimum mean dye penetration of 52.50 µm whereas the mean leakage scores observed in Group II i.e of 1087.50. Conclusion: The post space should be prepared before the root end surgery
ABSTRACT
The aim of this study was to investigate development of third molars in 18 year old North Indian male population by means of CT scans and 3D software imaging. Methods: A retrospective analysis of CT scans of 50 patients aged 18 years at the time of their scan was conducted, and the developmental stages of the left third molars were evaluated using Demirjian's classification. Demirjian's classification system distinguished eight stages of crown and root development (Stages A-H). Results: The percentile distributions were recorded for each stage of development and variations for different stages were noted. The developmental and physiological changes of the tooth can be correlated to chronological age. Conclusion: The present investigation could provide reference data for third molar development in the North Indian population and maybe used in wider studies of tooth development and age prediction using dental radiographs for forensic and medico- legal purposes.