A frenulum is a natural muscle attachment, typically between the front teeth (either upper or lower). It connects the inner aspect of the lip with the gum. A lack of attached gingiva (the pink gum tissue that is directly adjacent to teeth), in addition to a high (closer to the biting surface) frenulum attachment, which exaggerates the pull on the gum margin, can result in recession. Additionally, an oversized frenulum can prevent the teeth from coming together, which will result in a space between the front teeth. If pulling is seen or the frenulum is too large to allow the teeth to come together, the frenulum is surgically removed from the gum with a frenectomy.
When orthodontic treatment is planned, the removal of an abnormal frenulum will improve the orthodontic results.