Fixed Appliances

An appliance with a similar purpose and made in a similar way to the hyrax appliance. Here, however, instead of anterior rings, palatal miniscrews are used. The advantage is less dental side-effects and the fact that the appliance is more rigid in the anterior plane, so that there is less tooth or maxillary tilt.

Hyrax-like device, exclusively anchored on palatal 2 screws.
With the development of digital technology, it is now possible to digitally design the screw positions based on CT. Thus, a drilling template can be made and the device can be printed, thus obtaining an accurate device that can be anchored in one sitting

Hyrax-like device, exclusively anchored on palatal 4 screws.
With the development of digital technology, it is now possible to digitally design the screw positions based on CT. Thus, a drilling template can be made and the device can be printed, thus obtaining an accurate device that can be anchored in one sitting.

A cast or printed thick palatal arch anchored on rings, with hooks or other attachments for anchoring orthodontic elements. They may be made by soldering cast frames to rings or by printing entirely in metal. It may also include miniscrews as anchors.

Their job is to maintain the treatment result by keeping the teeth fixed in relation to each other, by splinting.The wire used as a splint can be a 0.4 mm twisted wire, or a thicker annealed round or ribbon-like wire made up of several strands.

An appliance anchored in the palatal tube of the bands on the maxillary first molars, consisting of a 0.9 mm arch following the dental arch orally and an acrylic bite pad fitting over the teeth and palate in the anterior region. Its height is communicated to the laboratory using a construction bite. The lower front teeth bite down on the pad to achieve bite elevation.

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.

Maxillary Skeletal Expander (MSE) is a specific type of Miniscrew Assisted Rapid Palatal Expander (MARPE), capable of producing large maxillary and midface expansion in young as well as in adult patients.

The MSE uses 4 TADs for fixation to the palate and a wrench for activation. It attaches to 2 molar bands via 4 legs for stabilization.

It is indicated in the treatment of posterior cross bite, Class III malocclusions and it is able to improve nasal airflow and breathing. Recent publications show the positive effects also in the therapy of Obstructive Sleep Apnea (OSA).

These retention appliances can be fixed or removable appliances. The fixed type consists of a band and a metal arm attached to it.
A removable appliance is actually an acrylic plate into which a space-retaining element or elements are inserted in order to keep adjacent teeth out of the area of tooth loss.