<qa>  What is the name of the new medical device that is marketed since 2011?A large number of functional appliances, mandibular advancement activators with various designs, fixed or removable, are used in Class II malocclusion correction; one of the largest means being used is the Herbst. These appliances can be individualized, made to measure by the prosthetist or standardised on market. A new medical device, EC marked and marketed since 2011, the Twicare, can be used as positioner, growth activator, but also for lingual re-education. 