An orthodontic tool designed to be placed around the head of a person to apply force to the teeth thereof through braces or brackets mounted on the teeth

摘要

An extraoral orthodontic force applying appliance defining an encircling assembly to be located about the head of the wearer which includes a single release mechanism incorporated at the nape of the wearer which will separate the encircling assembly upon the encircling assembly incurring an unusual force tending to enlarge the enclosed area of the encircling assembly. This release mechanism can be also purposely manually operated by the wearer for connection and disconnection. The encircling assembly can be collapsed when not in use to facilitate storage and portability.