Patent ID: 7094051

Claim:
An orthodontic arch expansion device, comprising: a first forward orthodontic band; a second forward orthodontic band; a substantially straight connecting member between said first and second forward orthodontic bands; a first rear orthodontic band; a second rear orthodontic band; a first spring loaded expansion apparatus between the first forward orthodontic band and the first rear orthodontic band; a second spring loaded expansion apparatus between the second forward orthodontic band and the second rear orthodontic band; said first and second expansion apparatuses each having one of a rigid hollow tube and a rigid rod connecting integrally inwardly of the first and second forward orthodontic bands, and said expansion apparatuses further including the other of a hollow tube and rod integrally connecting with the rear orthodontic bands; a spring applied to each of the rods, and said rods extending into the hollow tubes, to provide for linear expansion between the forward and rear orthodontic bands to provide the exertion of lengthening forces upon the teeth to which the orthodontic arch expander device is applied.