Loose-fitting removable orthodontic appliances which redirect the pressures of the facial and masticatory muscles onto the teeth and their supporting structures to produce improvements in tooth arrangements and occlusal relations.

Synonyms: Bionators, Jumper, Jasper, Function Activators, Andresen Appliance, Activator Appliances, Appliance, Andresen, Function Activator, Activator Orthodontic Appliance, Appliances, Activator, Activator Appliance, Activators, Function, Appliance, Activator, Appliance, Activator Orthodontic, Activator, Function, Appliances, Activator Orthodontic, Activator Orthodontic Appliances, Orthodontic Appliance, Activator, Orthodontic Appliances, Activator, Activator, Harvold, Harvold Activator, Bionator, Jasper Jumper