Invisalign can be used to fix the placement of multiple teeth in some cases. Whether you have an overbite, buck teeth or are just not happy with gaps. Invisalign has the capability to move lower teeth farther back so that they naturally sit where they should. In some cases, braces can be used with Invisalign. If the case is serious enough you may need more than Invisalign, or Invisalign may not help at all.