This 2nd Edition includes new, updated chapters that deal with important issues and were written by orthodontists known worldwide. Dr Dr Bernd Lapatki presents an outstanding chapter about Early treatment of Class II Div. 2 and Coverbite, that provides a step-by-step description on how to treat these malocclusions using different alternatives. In addition to this topic, Dr Amit Bhardwaj shares the following question, is early Class II treatment worth the effort? Dr Somchai Satravaha added a new chapter about the benefits of early treatment in cleft lip palate patients and long-term controls, where she discusses all the benefits. Digital technology is here to stay forever. Dr Bryce Lee explains how this technology can help us to achieve a better diagnosis and treatment plan. Dr Julia Harfin add new chapters including relevant topics as mandibular incisor agenesis ,impacted central incisors and, how to avoid long term relapse in early orthodontic treatment. She also updates other chapters. The most important controversies are discussed in detail and which will allow doctors to expand their knowledge in order to achieve better orthodontic treatment results. New topics such as orthodontic treatment in patients with hemophilia and diabetes are also discussed by Dr Eduardo Rey and Olga Ramos. The book, which is the result of many years of clinical practice, includes numerous clinical photographs that clearly exemplify how to diagnose and to treat all these patients. It is written by the most experienced team of doctors in the field and will be a valuable asset for all who specialize in odonto pediatrics and orthopedic-orthodontic treatments.