title: A morphological study on facial soft tissue in orthodontic treatment by use of activators.
mesh_terms: D000202:Activator Appliances; D002508:Cephalometry; D002648:Child; D005145:Face / Q000033:anatomy & histology*; D006801:Humans; D007368:Interferometry; D008310:Malocclusion / Q000628:therapy; D009968:Orthodontic Appliances, Removable; D010780:Photogrammetry