After completing orthodontic treatment, your retainer becomes one of the most important tools for maintaining your beautiful new smile. Whether you wore braces or Invisalign, retainers keep your teeth from shifting back to their original positions. But while retainers are designed to be long-lasting, they don’t last forever. So how often should you replace your retainer? The answer depends on the type you have, how well you care for it, and how it fits over time.
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