Regeneration of immature incisor using platelet rich fibrin: report of a novel clinical application.

Background: Endodontic treatment of young permanent teeth with necrotic pulp presents a clinical challenge for the dentist, and conventional endodontic treatment will result in tooth fracture along with a poor prognosis. Regenerative endodontics is a new protocol that has been advanced in the last decades for managing immature permanent teeth. Rare successful management of immature permanent incisors using platelet-rich fibrin is a technique-sensitive procedure.

Silver Diamine Fluoride in Preventing Caries: A Review of Current Trends.

Aim And Objective: To evaluate whether silver diamine fluoride (SDF) is effective in the management of dental caries.

Background: Dental caries is most common chronic disease and conventional treatment method could not tackle the problem completely. The use of silver compounds in dentistry is over a 100 years.

Kelthane residues in tissues of the tropical penaeid prawn, Metapenaeus monoceros (Fabricius), under sublethal chronic exposure--a monitoring study.

Monitoring the biodegradation and bioaccumulation of kelthane residues were undertaken during reclamation through oxygen consumption (respiration) and target enzyme activity assays. Even after 30 days of reclamation, non-recovery in respiration and target enzyme assays revealed the accumulation of kelthane as a residue in tissues. Thin-layer chromatography demonstrated the presence of kelthane residues as spots in tissue extracts of midgut gland and muscle after a 30-day recovery period.

Inhibition and recovery of selected target enzyme activities in tissues of penaeid prawn, Metapenaeus monoceros (Fabricius), exposed to different insecticides.

The target enzymes, acetylcholinesterase (for phosphamidon and carbaryl) and Mg2+ ATPase (for DDT and fenvalerate) have been assayed during exposure and reclamation of these insecticides in M. monoceros. Toxicity of these insecticides are in the order: fenvalerate greater than DDT greater than carbaryl greater than phosphamidon.