The Dynamax system: a new orthopedic appliance.

Skeletal Class II treatment requires harmoniza tion of the structures supporting the dentition, as well as tooth movement, if an esthetic facial appearance is to be achieved for the patient. Harmonized skeletal bases need less tooth movement and, in particular, less incisor root movement to produce the dental correction. Therefore, two-phase treatment, beginning with a first stage of orthopedic therapy, is now a useful approach. Although a number of appliances are available for orthopedic or functional therapy, many of these are relatively inefficient or have unfavorable dentoalveolar side effects. This article presents a new design that incorporates features of the original Bass Orthopedic System, 1-6 but with a much simplified construction and clinical technique. It is more comfortable for the patient and hence is readily accepted for full-time wear.