Functional Appliances
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Functional Appliances
Twin Block
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Dentofacial orthopaedic appliances utilize the muscle action of the patient to produce orthodontic or orthopaedic forces.

 HerbstFrankelTwin Block


The Bionator is one of the best known and most popular of the functional appliances.

The Bionator is most commonly used to correct a Class II occlusion.Bionator










The Bionator

The Twin Block incorporates the use of upper and lower bite blocks to position the mandible forward for  Class II correction. The basic appliances are separate upper and lower plates. The upper plate includes an expansion screw for lateral development and occlusal pads to cover the molars. The lower plate includes occlusal pads to cover the lower bicuspids. These plates interface at 70 degree angles to lock in the desired forward position of the mandible.

 Twin BlockThe Twin Block





The Herbst® appliance encourages the mandibular development in a forward direction by positioning it forward and holding it there.The Herbst appliance can be fabricated to be bonded or attached to upper and lower crowns. 





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