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The frenum is a muscle that attaches the upper and lower lips to the upper and lower gums, respectively. If the frenum is too large, it prevents the front teeth from coming together, thus creating a gap.

A frenectomy surgically removes this excess tissue. For parents who are worried about a large frenum affecting their child’s teeth, they should wait until the adult teeth have come in. And the surgery should not be performed before the gap in the teeth has been closed first. Surgery before closing the gap can result in scar tissue building impeding the closure of the gap.