This removable appliance is used to equally expand the arch. An expansion screw is embedded in the acrylic plate, while a labial bow and adams clasps are used for anchorage and retention. Additional clasping for even greater retention between the bicuspids is optional, as well as occlusal coverage on all posterior teeth.
Crowding may be alleviated through the use of sagittal appliances. This type of appliance is able to move anterior teeth labially, free up crowded space or distalize molars. Through the use of properly positioned expansion screws, and clasping for retention, both maxillary and mandibular sagittal appliances allow for proper expansion and case treatment.
Rapid Palatal Expander-Hyrax
Designed for quick and efficient expansion, this appliance breaks the patients median suture thus allowing for easy expansion with minimum resistance. This all metal hygienic appliance is typically fabricated with bands on the first molars and lingual bars extending to the first bicuspid. The RPE can also be used as a slow expander depending on the number of times activated daily/weekly.
Rapid Palatal Expander-Haas
With the same desired effects as a Hyrax, the difference is the screw placed in the center of the palate is embedded in an acrylic casing.
This all-metal hygienic appliance uses a small 12mm single-arm-screw. Due to its relative compact nature and size, it is one of the more comfortable lower expanders for patients and is primarily bonded to first molars.
This appliance has an anterior acrylic pad with an expansion screw embedded within. The acrylic pad is attached to lingual bars extending to first molar bands. The Gordon expander is designed to expand the width of the lower arch primarily in the anterior region, however it can also provide some molar expansion and buccal torque.
This appliance may be used on either maxillary or mandibular arches and is simplistic, yet extremely effective. Unlike the RPE, the W-Arch does not expand the whole upper arch but instead widens only the teeth in the arch form. It is a fixed appliance bonded to the permanent molars and expands at a slow rate without parental intervention.
This appliance is the same overall shape as the 'W' Arch but with includes the addition of extra helixes. Two are placed in the sub-gingival areas distal to the molar bands and two are placed near the anterior rugae. The extra helixes allow for further movement and positioning options.
Removable Space Regainer
These acrylic regainers are clasped for retention and incorporate a small acrylic screw where distalization needs to occur. Removable regainers have proven to be extremely effective and efficient.