Release of the labial frenum with a wide base. (A–B) Wide V-type of incision made at the most inferior portion of frenal attachments in the area of the alveolar ridge. (C) Supraperiosteal dissection completed, releasing mucosa and fibrous frenal attachments. (D) Diagram of mucosal margins sutured to periosteum. (E) Mucosal margins sutured to periosteum at the depth of the vestibule.