Preventive dentistry is the modern way of reducing the amount of dental treatment necessary to maintain a healthy mouth. The two major causes of tooth loss are decay and gum disease. The better we prevent or deal with these two problems, the more chances people have in keeping their teeth for life. The combined efforts of the dentist, the hygienist and the patient, can help to prevent the need for treatment, and so to avoid the traditional pattern of ϐillings and extractions of teeth. Tooth cleaning and polishing and ϐluoride application are all part of prevention program. Preventive dentistry has a wide range of opportunities for studies [1, 5, 15, 16]. There are interests in child dental health, geriatric dental health, ϐluoride and dental health, dental health services research, and dental labor force. Nanotechnology will change preventive dentistry and healthcare [7, 9, 10, 29, 30]. Current work is focused on the recent develop-

ments, particularly of nanoparticles and nanotubes for periodontal management, the materials developed such as the hollow nanospheres, core shell structures, nanocomposites, nanoporous materials, and nanomembranes will play a growing role in materials development for the dental industry.