Below are a few additional sources for information that you may find helpful:

American Association of Oral and Maxillofacial Surgeons
American Dental Association
Cincinnati Dental Society
Imaging Science International
3D Diagnostix
Designs for Vision Inc.
Thacker Orthodontics
Wolterman Orthodontics
Cassinelli and Shanker
Johnson Orthodontics
David D. Carrier, DDS, FACP, LTD.