Hyrax appliance

A rapid dilator, which works by tearing the labial suture and is used to dilate the upper dental arch skeletal body. It is usually anchored on 4 bands (first molars, first premolars, or possibly milk canines) It is advisable to perform a direct band test in the office. The bands are soldered to the metal arms of the Hyrax screw or possibly laser welded. The ideal expansion rate is 0.8-1 mm per day. The required dilation is overcompensated by 1-3 mm. The device is then left on for at least three months for retention. Can also be made with metal printing.