If you've ever looked in the mirror and wondered what is a gap between teeth called, the simple answer is a diastema. While most people just call it a gap, dentists and orthodontists use that specific term to describe any space between two teeth. Most of the time, when we talk about a diastema, we're picturing that classic space between the two upper front teeth, but the truth is, these gaps can show up anywhere in your mouth.
Some people absolutely love their gap—it's a signature look, a bit of character that sets them apart. Think of celebrities like Michael Strahan or Anna Paquin who've made the look iconic. Others, though, might feel a bit self-conscious about it or worry that it's a sign of a dental problem. Whatever your take on it, understanding why it happens and what it means for your oral health is pretty interesting.
The Science Behind the Diastema
So, we know the "what," but what about the "why"? It's not like your teeth just decide to distance themselves for no reason. There are actually several different things that can cause a diastema to form, and usually, it's a mix of genetics and the way your mouth developed when you were a kid.
One of the most common reasons is a simple mismatch between the size of your jawbone and the size of your teeth. If your jaw is a bit on the larger side but your teeth are relatively small, they're going to have extra room to spread out. It's like putting five people in a room meant for twenty; everyone's going to have a lot of personal space.
On the flip side, sometimes a tooth is just missing or undersized. This happens quite a bit with the "lateral incisors"—those are the teeth right next to your two front ones. If those are too small (dentists call these "peg laterals"), the front teeth might drift apart to fill the void, creating that central gap.
That Tiny Piece of Skin: The Labial Frenum
If you lift your upper lip and look in the mirror, you'll see a little piece of tissue that connects your lip to your gums. That's called the labial frenum. In some people, this tissue is a little too thick or grows a bit too far down between the two front teeth.
When this happens, it effectively acts like a physical barrier. It blocks the teeth from coming together naturally. If you've ever seen a child with a very wide gap between their baby teeth, a prominent frenum is often the culprit. Sometimes, as the adult teeth come in, the gap closes on its own, but other times, that tissue stays put and keeps the "diastema" wide open for life.
Habits That Can Create Gaps
Believe it or not, some gaps aren't just there from birth; they're actually "earned" through habits. One of the biggest ones is thumb sucking. Most of us did it as babies, which is totally fine, but if the habit sticks around too long—well into the years when adult teeth are pushing through—the pressure of the thumb can actually push the front teeth forward and apart.
Another weird one is something called tongue thrusting. Most people, when they swallow, press their tongue against the roof of their mouth. But some people have a "reverse swallow" where the tongue pushes against the front teeth instead. Over years and years of swallowing thousands of times a day, that constant pressure can slowly nudge the teeth outward, creating a gap that wasn't there before.
Is a Gap Between Teeth a Health Risk?
This is where things get a bit more practical. For a lot of people, a gap is purely a cosmetic thing. If your bite is healthy and you're happy with how you look, there's usually no medical reason to change it. However, a diastema can sometimes lead to gum issues.
Think about it: when your teeth are tightly packed together, they protect the gums between them. When there's a big gap, that section of the gum is exposed. Food can get trapped there more easily, and if you're not a dedicated flosser, that can lead to irritation or even gum disease in that specific spot.
Also, if the gap is caused by an underlying issue like gum disease (periodontitis), that's a different story. Gum disease causes bone loss, and when the bone that holds your teeth in place starts to disappear, the teeth can become loose and start to drift. If you suddenly notice a gap opening up in your adult years, it's definitely something you'd want a dentist to check out sooner rather than later.
How People Choose to Fix It
If you've decided the gap isn't for you, there are a bunch of ways to close it. We've come a long way from the days of just "getting braces" (though that's still a very popular and effective option).
Dental Bonding
This is probably the quickest and easiest way to fix a small gap. The dentist takes a tooth-colored resin—basically a high-tech plastic—and molds it onto the sides of the teeth to make them slightly wider, closing the space. It's painless, usually doesn't require any drilling, and can be done in a single visit. It's like adding a little bit of "filler" to the edges of your teeth.
Veneers
If you want something more permanent and perhaps a bit more "perfect" looking, veneers are a go-to. 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 also change the shape, color, and overall look of your smile. They're a bigger investment, but they last a long time.
Orthodontics (Braces and Aligners)
For bigger gaps or cases where the teeth are also crooked, traditional braces or clear aligners (like Invisalign) are the gold standard. Instead of "masking" the gap with resin or porcelain, you're actually moving the teeth into the right spot. It takes longer—months or sometimes a year or two—but the result is your natural teeth in the perfect position.
Surgery (Frenectomy)
If that little piece of skin we talked about earlier (the frenum) is the main problem, a dentist might suggest a frenectomy. It sounds scary, but it's actually a very minor procedure where they snip or laser that tissue to allow the teeth to move together. Often, this is done before or during orthodontic treatment so the gap doesn't just pop right back open after the braces come off.
The Trend of "Keeping the Gap"
Interestingly, the world of fashion and beauty has moved toward embracing "imperfections." In some cultures, a gap between the front teeth is actually seen as a sign of wealth, fertility, or good luck. In France, they even have a phrase for them: dents du bonheur, which literally translates to "lucky teeth."
Many models and actors choose not to fix their diastema because it makes their face more memorable. It's a bit of authenticity in a world of bleached, perfectly straight veneers. So, if you have one, don't feel like you have to rush to the dentist. Unless it's causing a health problem, it's really just a matter of personal style.
Final Thoughts
At the end of the day, whether you call it a diastema or just "that space between my teeth," it's one of those little quirks that makes your smile yours. It can be caused by anything from your DNA to the way you swallowed your food as a kid.
If you like it, rock it! If it bothers you, there are plenty of easy ways to close it up. Just make sure you keep the area clean and keep up with your dental checkups to ensure that your gap—or lack thereof—is part of a healthy mouth. After all, the best smile is the one you feel most confident sharing with the world.