The Pendulum has a Nance button and occlusal rests on the first and second premolars for anchorage. The springs are preactivated in the laboratory for easier insertion by the clinician. If the second molars are fully erupted, it is recommended that these be distalized first in order to achieve maximum efficiency in molar distalization.
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.