ABSTRACT
Background: Retention of crowns depends on various factors such as the retentive properties of the luting cements and the type of cast metal. Limited information is available regarding the retentive strengths of crowns, cemented with resin cements. Objective: The purpose of the study was to evaluate the retentive property of resinous dental adhesives with three other luting cements. Material and methods: Twenty freshly extracted human sound first mandibular molar was used for the study. The root of each tooth was embedded into a cylindrical shape block of self cured resin. Each of the tooth samples was prepared to receive a full metal crown. Total samples were divided into four groups, each containing five samples, for cementation of the metal crown in order to compare retentive properties of resinous adhesive and other luting agents; group A- resinous adhesive Panavia, group B - Zinc Phosphate cement, Group C- Glass ionomer cement, and group D- polycarboxylate cement. After 10min of cementation, the retention test was performed in an Instron tensile testing machine, to analyze the retentive properties of different luting cements. A one-way analysis of variance was used to analyze the data, with a significance level of alpha =.05. Results: Result showed a maximum mean retentive strength in Panavia Ex. (281.34kg), followed by Glass Ionomer (70.21kg), Polycarboxylate (63.06kg), and least in Zinc Phosphate cement (40.31 kg), which was statistically significant. Conclusion: Within the limitation of the present study, it was concluded that resinous adhesive Panavia Ex. cement has better retentive properties compare to other luting cements.
ABSTRACT
A grossly decayed tooth sometime poses difficulty in fabrication of FDP, The post core is often required to gain support from the remaining tooth structure, In a multirooted tooth where more then one root were used as support the path of insertion of post is difficult, in those cases a custom split post and core has to be fabricated. This case report describes a simple and scientific multidisciplinary approach towards management of grossly decayed tooth. The technique seems to be effective for extensively damaged teeth that lack sufficient tooth structure to create an adequate ferrule of 1.5 to 2 mm for the final crown.
ABSTRACT
The replacement of a single missing anterior tooth with an implant-supported crown is a demanding therapy. This report describes a treatment in which an anterior maxillary implant was immediately restored with a provisional restoration. During the provisional phase, an optimal emergence profile was created by adjusting the provisional restoration. An impression was made with an individually fabricated impression post for an accurate reproduction of the established emergence profile and, finally, a screw-retained all-ceramic crown was placed. By implementing this protocol, an optimal definitive result could be achieved, together with immediate patient satisfaction.
ABSTRACT
Immunisation protects children and adults against harmful infections before they come into contact with them in the community. Immunisation is given as an injection or, in the case of polio vaccine, taken as drops by mouth. The waste generated during the whole immunisation process must be disposed off properly. Improper waste disposal leads to serious health risks to recipients, health workers and the public. In King George’s Medical University (KGMU) immunisation programmes are conducted regularly. Waste generated during the process are properly mutilated, collected, transported and disposed off. In KGMU a well established biomedical waste management system which disposed offs the waste as per the norms and legislation.