Harvold Activator
《英文msh詞典》Harvold Activator
[入口詞] Harvold Activator
[主題詞] Activator Appliances
[英文釋義] 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.