Braces or Invisalign can help you get a beautifully straightened smile that you can enjoy for life, but only if you take care of your results correctly! Most orthodontic patients will need to wear a retainer for life after completing their treatment in order to prevent their teeth from shifting out of position again. However, a single retainer certainly won’t last you that long! Here are the top four most common signs that it’s time to get a new one in order to keep your smile straight and healthy.