Nanotechnology is the study of materials associated with components which are less than 1 to 100 nanometer .[1]The word (NANO) is derived from the greek word nanos which means dwarf which symbolises the word ‘Billionth’.It explains that a nanoparticle(10-9 )m is billion times smaller than a normal macro scale particle .These nano size particles cannot be viewed under ordinary microscope they need specialised high resolution microcopic devices devices to view them. The word nanotechnology was a controversy in the last centuries ,as it was not used in various fields in our life but nowadays it is evident that it is being used in several fields and also having various applications especaially in the field of dentistry. This usage is due its advantages that shows the good working of nanotechnolgy in nanoscales than in usual micro or macro scales .Due to its nano size it is expected to have various properties than normal particles because of its greater surface area . In denistry these nanoparticles has been started to be used to prepare more useful efficient materials and several devices These Nanoparticles have many advantages in dental field, such as (i) storing capacity and good stability in dental fluids , (ii) preparation methods are getting easier, (iii) easier large-scale manufacturing, (iv) Area specific controlled or timed release. Nowadays ,nanoparticles satisfy the needs of dentistry in deliver of medicated drug directly to diseased site , for example in to the gingival pocket or dento-gingival pouch /sac and also have controlled timely release of drugs.

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