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Hyrax Expander
An expander works by making enlarging the dental arch. It helps to straighten crowded teeth, as well as create room for the rest of the permanent teeth to erupt without becoming overcrowded. It can also work by correcting the the bite.
The Hyrax expander consists of two rings (bands) or chrome crowns covering the back molar teeth on each side of the mouth. Welded to these bands or crowns are strong wires that are attached to a rectangular shaped expansion screw. For the upper expander, the screw is located in the palate. The upper expansion screw is usually activated one turn each day for two weeks, preferably the same time of day each day.
