This book is aimed at the parents of children having adverse oral habits and to dentists with an interest in preventing, treating and learning the damage caused by adverse oral habits on dentofacial structures. It is not necessarily assumed that the reader attracted to the book has a detailed knowledge of adverse oral habits, its relation to dentofacial structures and the malocclusion caused by them. The delicate shading involved in a decision on just what is normal or abnormal and the dividing line between physiologic and pathologic are often established by the interaction of the training, clinical experience and philosophical bent of the dentist. If parents are aware of normal and can differentiate between normal and abnormal for that age group, and have clear mind set regarding the cause and effect of particular habit, the situation can be dealt in better way. Increased stress levels in modern societies cause these habits to become more prevalent as compared to the past decades. Hence, this book is the end of thrust for knowledge to parents and dental students in prevention, management and rehabilitation of adverse oral habits.