A Frenectomy is a surgery that is used to remove excess frenal tissue. A frenum is a small muscular fold that attaches two tissues together. The purpose of the frenum is to limit muscle movements which prevents tissue damage.
There are two different kinds of frenums in the mouth. The first is the lingual frenum which connects the tongue to the bottom of the mouth. The second is called a labial frenum which connects the lips to the gums above or below the teeth.