A frenum is a fold of tissue or muscle that connects the lips, cheek or tongue to the jawbone. A frenectomy is a procedure to remove one of these folds of tissue. There are times where the frenum is attached between the two upper front teeth and its presence may create space between the two front teeth. Even if an orthodontist closes this gap, the frenum can still push the teeth apart once more. Additionally, the frenum may contribute to tooth recession and in those cases can be removed to lessen the chance of further recession.