The course introduces first year residents to mechanical principles and their applications in orthodontic tooth movement and dentofacial orthopedics. It also familiarizes them with the properties and applications of different types of materials and contemporary orthodontic appliances commonly used in practice. The residents develop an in depth understanding of continuous and segmental mechanics, sliding and frictionless approaches, as well as different intra and extraoral anchorage management options. Clinical applications of one and two couple systems in orthodontics is covered giving the residents the knowledge base to choose the most efficient mechanical concepts in executing orthodontic treatment plans.