A fixed appliance for the distalization and derotation of the upper first molars, the Pendulum appliance eliminates patient compliance concerns from this treatment objective.
A large Nance type acrylic button is used in conjunction with wire rests that are bonded to the occlusal surface of the bicuspids to provide anchorage.
Helical springs of .032 TMA wire extend from the distal portion of the acrylic button and are fit into lingual sheaths on the first molar bands. The springs are preactivated in the laboratory and, once fit into the sheaths, provide a continuous light pressure for the desired molar distalization. The design is similar to the Pendex pictured below without the expansion screw.