A frenum is a naturally occurring muscle attachment.It is normally seen between the front teeth (either upper or lower) but frenums can be located at other areas also. A frenum connects the inner aspect of the lip with the gum. A lack of attached gingiva in conjunction with an abnormal frenum attachment can result in recession. Additionally, an excessively large frenum can prevent the teeth from coming together resulting in a gap between the front teeth. If pulling is seen or the frenum is too large to allow the teeth to come together, the frenum is surgically released from the gum with a frenectomy. A frenectomy is simply the surgical repositioning of a frenum.
When Orthodontic treatment is planned or initiated, the removal of an abnormal frenum, with or without a gingival graft, can increase stability and improve success of the final orthodontic result.