Whether your treatment plan includes traditional braces or Invisalign, orthodontic treatment works by slowly shifting the position of your teeth by small increments over time. When you have an adjustment appointment (or start a new set of Invisalign aligners), you may experience some minor sensitivity.  We suggest taking acetaminophen (Tylenol, for example) for this soreness prior to your appointment and afterward if necessary.  This discomfort should be minimal and only last a day or so.