Resiliently expandable orthodontic device

摘要

The orthodontic device comprises a rigid cylinder having a first end and a second end, a plunger having a first end and a second end, the plunger being at least partially within the cylinder, a coil spring within the cylinder, the coil spring engaging the first end of the plunger for urging the plunger from the cylinder and a stop for preventing separation of the plunger from the cylinder. There is a first attaching device for attaching the first end of the cylinder to one of the points on a set of teeth, and a second attaching device for attaching the second end of the plunger to the other of the points on a set of teeth. The first attaching device comprises a ball within the cylinder and the second attaching device comprises a crimpable clamp for loosely engaging the second point so that the first and second attaching device allow universal motion between the orthodontic appliance and the set of teeth.