Polymers for drug delivery applications have been synthesised via environmentally benign routes and with sustainable feedstocks.

Introduction:The main aim of root canal treatment is cleaning, shaping and then obturating three dimensionally to prevent reinfection. This includes chemicomechanical cleansing by instrumentation and the use of irrigating solutions. Therefore, the purpose of this study was to compare the smear layer removal from root canal dentine subjected to two root canal irrigants, 17% EDTA and 0.2% Chitosan, a new irrigant using Scanning Electron Microscope.Methodology:40 single rooted premolars were decoronated followed by instrumentation with I Race files and intermediate irrigation with 3% sodium hypochlorite and activation with ultrasonics. Then the samples were longitudinally sectioned and place in the respective test solutions and their controls for 5 minutes. Scanning Electron Microscopic evaluation was further carried out.Results:The results of the present study indicates that the Chitosan which was proved effective in removing smear layer.Conclusion:A moderate concentration of 0.2% chitosan removes the smear layer with greater efficiency.

Block co-polymers with a block derived from a sustainable monomer source are used to encapsulate and release the drug indomethacin.