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Hybrid Twin Block Expander Appliance

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sushantpatel_doc's picture
Joined: 30 Nov 2009

This appliance is used to widen the palate by cranking a screw. Usually once a day.
Due to the positioning of the 4 blocks of plastic (two on each side), the patient's mouth can only shut when the bottom jaw is as far forward as it will go. The blocks of plastic are shaped so that the patients jaw will slide open of the patient does not constantly push their bottom jaw forwards.
The position of the plastic blocks also cause the toungue to not lie flat which causes noticeable changes to speech.

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