Journal of Dental Medicine

:.In the result of first world investigations, it has recommended that most oral and dental disease (over 80%) can be prevented by oral hygiene Instruction and sanitary methods.In our investigation, we have wanted to estimate the rate of knowledge, attitude and practice of dentists in urmieh. Our results exhibited that the rate of dentist's knowledge about sanitary and preventive methods and their etiologic relations of oral disease is 95%.But in spite of this high rate of knowledge the dentists attitude rate is %55.48 and more strange is that the practice of these dentist in relation with sanitary and preventive methods for patients has evaluated about 66.17% that ,this rate is 13% more than their attitude rate. The cause of this strange result, may be is dentists un honestly answer or because of their high theoretical knowledge of our dentist. May be we thinking that this recent factor in spite of insufficient attitude has effected on their practice.