This Book markedly emphasizes the Importance of a person to know about his Genetics. Genetics Had already proven its importance in art of knowing about the species from the basic cell of reproduction and also about the various features that a species adopt from his ancestors. Thousands of inherited Human disorders have been catalogued till date, but the underlying genetic causes of less than 20 percent of those disorders have been discovered so far. Studies of population, families, and twins have provided good evidence that genetic factors play an important role in almost every aspect of craniofacial growth and development including Oro-dental diseases like caries, periodontal diseases and malocclusion had provided major platform to work upon these genetic information. This book provides illustrative studies on genetic in the recent scenario regarding Oro-dental Diseases. A sincere effort has been made to describe the comprehensive aspect of genetic influence of oral diseases on a global aspect.