Dental caries is often not self-limiting and without proper care, caries can progress until the entire tooth is destroyed. It can be prevented considerably by controlling multiple factors that are the causative agents of this disease. Any factor that can balance between remineralization and demineralization can be utilized as a weapon in the battle against dental caries. However, for some individuals, it happens simultaneously in the oral cavity.For a Paediatric patient assessing the risk of dental caries and preventing the teeth from it is extremely important. Various materials and methods have been reported in the literature to attain prevention from decay depending on its clinical potential. Along with the improved advancements in prevention and assessment of dental caries patient's and operator's convenience must also be considered. Therefore, by re-establishing the optimal oral health through the various approaches which are discussed in this book, a Paediatric dentist can preserve tooth structure and avoid costly & extensive dental treatments among children.