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Retainers designed for use in dental treatments, either for permanent use as prosthesis support or for temporary use in orthodontic and/or restoration procedures. Retainers are typically metallic casts, wires, or bands that may be an integral component of fixed prostheses, partial dentures, or orthodontic devices. Retainers intended to maintain natural or artificial teeth in an appropriate position are usually attached to abutment teeth; temporary retainers used in orthodontic procedures are used for relatively long periods of time (e.g., weeks, months, years) while temporary retainers intended to held matrix bands used to contour and confine dental restorative materials are used only during the dental procedure.
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Retainers designed to hold teeth in place during the period of functional adaptation while surrounding gingival tissue (i.e., gums) and bone adjusts to a new position following corrective orthodontic treatment. Orthodontic retainers may be fixed (i.e., nonremovable) metallic wires placed around tooth abutments or removable retainers that typically consist of a metallic wire surrounding the teeth or, less frequently, a transparent plastic device that fits over the entire tooth arch. These retainers are frequently used after the removal of or braces are removed to prevent rehearsal at the Modifications in the positions of the teeth and jaws gained by orthodontic procedures.
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