A custom-made resilient orthodontic appliance for positively positioning the opposing arches relative to each other and a method for making the appliance, wherein the appliance includes a body of thermoplastic material sized to have impressions of the upper and lower anterior teeth and including means...http://www.google.es/patents/US5067896?utm_source=gb-gplus-sharePatente US5067896 - Orthodontic appliance
