Many people notice a gap between their two front teeth at some point in life. This gap, medically known as a diastema, is fairly common and can appear for a variety of reasons, including genetics, the size of your teeth relative to your jaw, or habits like thumb sucking in childhood. While some embrace it as a unique feature, others may feel self-conscious and look for ways to close the space. The good news is that there are several safe and effective cosmetic dental treatments to address it, depending on your goals and oral health.