MANDIBULAR ADVANCEMENT APPLIANCE

摘要

A mandibular advancement device for pulling the jaw forward includes upper and lower plastic trays conforming to upper teeth and maxillary dentition soft tissue and palate and lower teeth and mandibular dentition and soft tissue, respectively. A ball type of hook support is located on both sides of the upper tray at a forward position and a plurality of ball type of hook supports are located at a rearward position of both sides of the lower tray. Tension coil springs are fitted to each of the upper tray ball hook supports and to one of the plurality of lower ball type of hook supports. The plurality of lower tray ball hook supports provides discrete levels of tension force of the coil spring on each side of the appliance. A plastic tube may be fitted over the coil springs to prevent injury to the inside of a user's mouth.