Amos Dudley, a broke graduate student, designed his own orthodontics to correct his own teeth for which he used Stratasys Dimenstion 1200es. Obtaining the 3D Printer, he used retainer material Keystone Pro-Form .030 plastic purchased from eBay and finally made all of his aligner steps, as well as a riser, while eliminating ‘draping artifacts’ as well as saving time.
Source: http://amosdudley.com/weblog/Ortho