Frena are small folds of tissue located in the mouth: under the tongue, inside the upper lip, inside the lower lip, and connecting the cheeks to the gums. A frenectomy is a surgical procedure to loosen or release these bands. An oral and maxillofacial surgeon (OMS) typically performs a frenectomy to increase the range of motion of the tongue (removing the lingual frenum) or to close a gap in a patient’s upper front teeth (removing the labial frenum).