"Deleterious Oral Habits" is a professional book that addresses the complex patterns of oral habits and their effects on dentoalveolar and skeletal structures. It highlights how repetitive behaviors, often occurring in early childhood, can lead to significant changes in jaw and dental growth. The book provides a comprehensive analysis of the causes and consequences of these habits, including potential dentoalveolar deformities such as open bites and crossbites. Additionally, it emphasizes the importance of the child's medical and developmental history to understand the physical, emotional, and genetic factors contributing to these habits. The work is aimed at professionals in the field of dentistry and offers valuable information on treatment approaches ranging from behavior modification to myofunctional therapy. It is an essential reference for anyone involved in the prevention and treatment of harmful oral habits.