The Hyrax appliance from Ortholab Zuid.

The hyrax appliance is an all-metal expansion device which is laser-welded onto 4 bands.

By means of a special long key, the expansion screw can be unscrewed, so that a narrow upper jaw achieves the correct relationship with the lower jaw.

If you have any questions about Ortholab Zuid or one of its products, you can call us at +31 (0)40-2413969 and ask for Frans Klaasen or you can send an e-mail to and we will answer your question as soon as possible.