Nanotechnology is considered to be an upcoming technology. In the field of dentistry, it helps in diagnosis, prevention and treatment. Nanotechnology incorporates the usage of nanoparticles less than 100 nm. It has delivered its impact on almost every facet of science and development. It is but natural that medicine and dentistry too are being influenced by this recent entrant which has immense potential. A new revolution in the field of dentistry by the use of nanotechnology has got remarkable potential that can bring considerable improvements to human health in the form of nanomaterials, nano diagnostics and nano robotics. The usage of nanoparticles in restorative materials has increased the quality and life of dental restorations resulting in better oral care and hygiene. The technology helps in modifying the existing restorative material in terms of physical, chemical and biological aspects to improve their quality. The restorative materials with nanoparticles currently used are nanocomposites, nano glass ionomers, nano adhesives. In endodontics these nanoparticles can be incorporated in endodontic sealer, obturating material, intracanal medicament and irrigating solutions to provide the desired results. Nanotechnology possesses tremendous potential but social issues of public acceptance, ethics, regulation, and human safety must be addressed before it can be looked upon as the hope for the future.