Orthodontic appliance for forward displacement of the lower jaw of a patient

摘要

Wires are guided around the upper and the lower teeth of the patient joined with a telescopic device (2) positioned between them. The outer element (6) is attached with a joint (4) to the appropriate spot at the lower teeth (1), the upper end of the inner element (7) is swivel mounted (5) to the end of the upper wire. The joint element (4) is provided with an inner thread to be moved along an outer thread positioned at the surface of the outer part (6) of the telescopic element (2) when this is rotated with a screw driver or an Allen key inserted into a space at its lower end.