If you've just noticed your orthodontist sliding some tiny metal coils onto your wire, you're likely dealing with closed coil spring braces. These little components might look like something you'd find inside a ballpoint pen, but they play a massive role in how your smile eventually turns out. Most people are familiar with brackets and wires, but these springs are the "special forces" of the orthodontic world, stepping in when the wire alone can't do all the heavy lifting.
If you're sitting there wondering why you have these or what they're actually doing to your mouth, don't worry. It's a super common part of the process, especially if you have gaps that need some extra encouragement to close up.
What exactly are these things?
In the simplest terms, a closed coil spring is a tightly wound piece of wire—usually made of stainless steel or a nickel-titanium alloy—that sits on your main archwire. Unlike an "open" coil spring, which has gaps between the coils and is designed to push teeth apart, closed coil spring braces have coils that are already touching.
The whole point of a closed coil is its desire to stay closed. When your orthodontist stretches it out and hooks it between two points (like two brackets or a bracket and a molar hook), the spring wants to snap back to its original, compressed shape. That constant, gentle pull is what creates the movement. Think of it like a very tiny, very persistent bungee cord that never gets tired of pulling.
Why your orthodontist chose them
You might be wondering why you couldn't just use those colorful rubber bands (power chains) to close your gaps. While power chains are great, they tend to lose their "oomph" after a week or two as the material stretches and degrades in your mouth.
Closed coil spring braces are a bit more industrial-strength. Because they are made of metal, they provide a much more consistent and "active" force over a longer period. They don't give up. They keep pulling with the same amount of pressure from the day they are installed until the day your orthodontist takes them off. This makes them incredibly efficient for moving stubborn teeth or closing larger gaps caused by extractions.
Closing extraction gaps
This is probably the most common reason people end up with these springs. If you had to have a premolar removed to make room for crowded teeth, you're left with a pretty noticeable hole. The closed coil works to pull the front teeth back or the back teeth forward to seal that space shut.
Fixing "flare"
Sometimes, front teeth can tilt forward a bit too much. By using closed coil spring braces anchored to the back molars, the orthodontist can pull those front teeth back into a more vertical, aesthetically pleasing position.
What does it feel like to wear them?
I'm not going to sugarcoat it—the first few days with a new spring can be a bit "tight." Since these springs are designed to apply constant pressure, you're going to feel that tension. It's not necessarily a sharp pain, but more like a dull ache or a heavy pressure on the teeth that are being targeted.
The good news is that your mouth is surprisingly good at adapting. After about three or four days, that "my teeth are being squeezed" feeling usually fades into the background. You'll probably only notice it if you bite down on something particularly crunchy or if you accidentally snag your lip on the end of the spring.
Pro tip: If the spring is rubbing against the inside of your cheek, don't be a hero. Use your orthodontic wax. Slather a little ball of wax over the area where the spring meets the bracket. It creates a smooth buffer and gives your cheek time to toughen up.
Living with the hardware
One of the biggest adjustments with closed coil spring braces isn't the pressure—it's the cleaning. Because the coils are wound so tightly, they are absolute magnets for food. Bread, leafy greens, and anything stringy (looking at you, pulled pork) love to get tangled in there.
Cleaning tips that actually work
- The Water Flosser is your best friend: Honestly, if you don't have one yet, now is the time. A water flosser can blast out particles stuck inside the coils that a regular toothbrush just can't reach.
- Interproximal brushes: Those little "Christmas tree" brushes are perfect for sliding under the wire and behind the spring to dislodge stubborn bits of lunch.
- Check the mirror: It sounds obvious, but get into the habit of doing a quick "spin check" in the mirror after you eat. These springs are often in the "smile zone," and they're very good at hiding a piece of spinach.
How long do they stay on?
There isn't a one-size-fits-all answer here because everyone's bone density and tooth movement speed are different. Some people might only need closed coil spring braces for a few months to finish off a tiny gap, while others might have them for six months or more if they are moving a tooth a significant distance.
The "magic" happens through a process called bone remodeling. As the spring pulls the tooth, it creates pressure on one side of the root and tension on the other. Your body responds by breaking down bone in the direction of the movement and building new bone behind it. This takes time! If you move teeth too fast, you risk damaging the roots, so your orthodontist will keep the pressure at a "low and slow" steady state.
Dealing with "poky" bits
Sometimes, as the gap closes, the wire that the spring is sitting on might start to poke out the back of your last molar. This is actually a good sign! It means the teeth are moving closer together, leaving "extra" wire at the end.
If this happens and it starts stabbing your cheek, don't try to clip it yourself with nail clippers (yes, people try this, and no, it usually ends badly). Just call your ortho. Most offices will let you pop in for a "comfort visit" where they can snip the end of the wire in about thirty seconds.
A few final thoughts
While closed coil spring braces might feel like a weird addition to your mouth, they are one of the most effective tools your orthodontist has. They're durable, they work around the clock, and they're often the final step in getting that perfectly aligned bite.
Just keep up with your hygiene, use your wax when you need it, and remember that every bit of pressure you feel is just progress in disguise. Before you know it, those gaps will be gone, the springs will be off, and you'll be looking at a whole new smile in the mirror. It's a bit of a process, but honestly, the results are almost always worth the weird feeling of having tiny springs in your mouth.