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What’s the difference between retainers and aligners?


  • Written by
    Michael Noorani
  • Posted on
    Sep 19, 2025

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Retainers and aligners may look similar at first glance, but they serve very different purposes. Aligners, such as Invisalign trays, are designed to move teeth into better positions through a series of gradual changes. Retainers, on the other hand, are used after treatment is finished to hold teeth in their corrected positions. While aligners are worn most of the day, retainers are usually worn full-time at first and then only at night. Both are essential tools in orthodontics, but retainers are the long-term key to keeping a new smile stable for life.


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