Unintended Orthodontic Movements With Long-Term Fixed Retainers

After completion of orthodontic treatment, retaining the orthodontic outcome is crucial. There are, however, a number of liabilities associated with long-term fixed retainers. This article describes unintended movements associated with some designs of fixed lingual retainers and suggests alternative designs while also identifying corrective measures that may be taken for reparative treatment. The article highlights inadvertent side effects of specific designs that need to be recognized and presents design options that may be more appropriate depending on the nature of the case.