Dental caries a dynamic disease, is an important dental public health problem and is the most prevalent disease of oral cavity among children in the world*. This disease not only causes damage to health but is also responsible for several morbid conditions(such as periapical abscess, periapical granuloma ,Cyst) of the oral cavity and other systems of the body****. Although the prevalence of caries is declining ,mainly because of the wide spread of fluorides ,there still remains a subgroup of susceptible children at high caries risk. The dental caries usually starts in childhood and is undetected till adult life leading to complications and tooth mortality. Dental caries is a multifactorial disease influenced by many factors including age,sex,diet,microorganisms,oral hygiene etc.