The number of adult patients receiving orthodontic treatment is increasing worldwide. By proper diagnosis and treatment planning as well as taking into account the individual circumstances that may affect the patient's biological response to treatment, realistic goals of orthodontics can be mutually recognized and agreed on by both the provider and the patient before therapy is initiated, resulting in an immensely rewarding experience. This book provides an insight to various factors which needs to be considered during orthodontic treatment of an adult patient.