If you've ever looked in the mirror and wondered what that little gap between teeth is called, you're definitely not alone. Most of us just refer to it as a "gap" or a "space," but if you ask a dentist, they'll use a much fancier term: diastema. It sounds like something out of a science fiction movie, but it's actually one of the most common dental features people have.
Whether it's a tiny sliver of a space or a more noticeable opening, a diastema can show up anywhere in your mouth. However, the one most people notice is the "midline diastema," which is the classic gap between the two front upper teeth. Some people love their gap—it's often seen as a sign of character or even good luck in some cultures—while others spend years trying to figure out how to close it.
So, Why Do Some People Have a Diastema?
Understanding what the gap between teeth is called is one thing, but figuring out why it's there is a whole other story. It isn't always just a random quirk of nature; there are usually a few specific biological reasons why teeth decide to move apart.
One of the biggest factors is simply the size of your teeth versus the size of your jawbone. If your jawbone is relatively large and your teeth are on the smaller side, they're going to spread out to fill the space. Think of it like trying to fill a large room with small furniture; you're naturally going to have some empty floor space.
Another common culprit is something called the labial frenum. That's the fancy name for that little piece of tissue that connects the inside of your upper lip to your gums, right above your front teeth. In some people, this tissue is a bit too thick or grows down too far, acting like a physical wedge that pushes the teeth apart. If that tissue stays there, it'll keep those teeth separated no matter how many times you try to push them together.
Habits and Health Factors
Sometimes, a gap isn't something you're born with, but something that develops over time. Habits we had as kids (or even carry into adulthood) can play a massive role.
- Thumb Sucking: We've all heard parents warn about this. Sucking on a thumb or a pacifier puts consistent pressure on the front teeth, pushing them forward and outward, which often results in a gap.
- Tongue Thrusting: This is a bit more subtle. Some people have a swallowing reflex where the tongue pushes against the front teeth rather than the roof of the mouth. Over thousands of swallows a day, that pressure is enough to migrate the teeth.
- Gum Disease: This is the one you really want to watch out for. If gum disease gets serious, it can lead to bone loss. Since the bone is what holds your teeth in place, losing that support makes teeth get loose and start to drift, creating new gaps where there weren't any before.
Is Having a Gap a Problem?
Honestly, it depends on who you ask. From a strictly medical standpoint, a diastema isn't always a "problem" that needs fixing. If your teeth are healthy, your bite is aligned, and you aren't experiencing any pain, having a gap is mostly an aesthetic choice.
In fact, the fashion world has embraced the gap for years. High-fashion models and celebrities have made the "gap-toothed" look a symbol of unique beauty. It can give a face a lot of personality and a youthful vibe. In some parts of the world, like Nigeria or France, a gap between the front teeth is even considered a sign of wealth or fertility.
However, there are times when a gap can be a bit of a nuisance. Food tends to get stuck in there more easily, which can lead to plaque buildup and irritated gums if you aren't a dedicated flosser. It can also sometimes affect the way you speak, causing a slight lisp or a whistling sound on certain words.
Choosing to Close the Gap
If you've decided that you're over the gap and want a more seamless smile, the good news is that modern dentistry has about a dozen ways to handle it. You don't always have to go through years of metal braces anymore.
Dental Bonding
This is probably the quickest and easiest fix. A dentist uses a tooth-colored composite resin (the same stuff they use for fillings) and sculpts it onto the sides of the teeth to "widen" them and close the gap. It's usually done in a single visit, doesn't require any numbing, and looks incredibly natural. The only downside? Bonding isn't as strong as your natural enamel, so you have to be careful about biting into hard apples or ice.
Veneers
If you want a more permanent and "perfect" look, veneers are the way to go. These are thin shells of porcelain that are custom-made to fit over the front of your teeth. They don't just close the gap; they can change the color, shape, and overall look of your smile. They're much more resistant to staining than bonding, but they're also a bigger financial investment.
Orthodontics (Braces and Aligners)
For gaps that are caused by the positioning of the entire arch of teeth, orthodontics is the gold standard. While traditional braces are still an option, many adults opt for clear aligners like Invisalign. These allow you to move your teeth into the correct position over several months without anyone really noticing you're wearing them.
The Frenectomy
Remember that thick piece of tissue (the frenum) we talked about earlier? If that's the cause of your gap, a dentist might recommend a "frenectomy." It sounds scary, but it's just a tiny surgical procedure to clip or thin out that tissue. Usually, this is done before braces or bonding so that the tissue doesn't just push the teeth apart again once the treatment is finished.
Keeping the Gap Closed
The most important thing to remember if you choose to close your diastema is the retention phase. Our teeth have a "memory," and they really like to go back to where they started. If you use braces or aligners to close a gap, you must wear your retainer as directed.
I've known plenty of people who spent thousands on clear aligners, got the perfect smile, and then got lazy with their retainer. Within a year, that little gap started peeking through again. If the gap was caused by a large jawbone or small teeth, that space is always going to be "available," so your teeth will try to take advantage of it if they aren't held in place.
Final Thoughts
At the end of the day, knowing what the gap between teeth is called—diastema—is just the first step in deciding what to do with it. It's one of those dental features that is truly a matter of personal preference.
If your gap makes you feel confident and unique, keep it! It's a part of your identity. But if it's something that makes you hide your smile in photos, or if it's causing health issues like gum irritation, don't hesitate to chat with your dentist. Whether it's a quick bonding session or a few months of aligners, you have plenty of options to get the smile you want. Just remember that every mouth is different, and what works for one person might not be the best fit for you—but that's exactly why those dental pros are there to help.