There Are Many Reasons You May Develop Gaps in Your Smile
A frenulum or frenum refers to the band of tissue under the top lip, underneath the tongue, and inside the cheeks. If the tissue is longer than normal, it can cause gaps between the front teeth, either in the top or bottom jaw.
Extra Teeth or Small Teeth
Smaller than average teeth or extra teeth that block others from coming in can leave gaps in your smile.
In some cases, the jaw is relatively large compared to the size of the teeth.
You may have been born without certain teeth, which leaves a space behind in the jaw.