activator appliance การใช้

• Herren modified the Activator appliance by including clasps on the appliance.
• Activator appliance initially started out as one block of acrylic which fit in both maxillary and mandibular arch.
• Schwarz modified the original activator appliance by making activator a two part appliance and connecting it with elastic bow.
• Myotatic reflex activity with isotonic muscle contraction is stimulated and this loose appliance works with kinetic energy, just like activator appliance.
• The double active plate of Schwarz tried to combine the effect of activator appliance and plates by created two separate plates for each arch.