Craft32 Dental care in saligramam, vadapalani, virugambakkam A Hyrax expander is an orthodontic appliance used to widen the upper jaw (maxilla). It is commonly used in children and adolescents whose bones are still growing. The device is attached to the upper molars with bands and has a central screw that, when turned, gradually separates the mid-palatal suture, expanding the arch. How It Works: Installation: The Hyrax expander is custom-made for each patient and cemented onto the upper molars. Activation: The central screw is turned, usually by a parent or the patient, using a special key. This creates tension at the suture, leading to bone growth and expansion. Duration: The expansion phase typically lasts a few weeks, after which the appliance may be left in place for several months to allow the bone to stabilize. Benefits: Corrects crossbites. Creates more space for crowded teeth. Improves breathing by widening the nasal passages. Considerations: Some discomfort or pressure is normal, especially when the device is first activated. Patients need to maintain good oral hygiene, as the appliance can make brushing more challenging.