Orthodontic spacers typically last one to two weeks before they’re removed for braces. Asthma inhaler spacers, a completely different device, last about 12 months with proper care. Since both are commonly called “spacers,” here’s what you need to know about each.
Orthodontic Spacers: One to Six Weeks
Orthodontic spacers (also called separators) are small pieces placed between your back teeth to create room before molar bands or braces are fitted. How long they stay in depends on the type your orthodontist uses.
Rubber spacers are the most common. These small elastic rings sit between your molars and gradually push them apart. They stay in for one to two weeks, then typically fall out on their own once enough space has been created. That’s actually the goal: if one falls out, it usually means it did its job.
Metal spacers are small, flexible metal rings that wrap around a molar. They’re more durable and stay in place longer, anywhere from one to six weeks. Orthodontists choose metal spacers when more separation time is needed or when a patient would otherwise need frequent office visits to replace fallen-out rubber ones.
What Spacer Discomfort Feels Like
Most people describe spacers as a dull pressure or soreness, not sharp pain. The discomfort peaks in the first 24 to 48 hours after placement and then fades over the next few days as your teeth adjust. By the end of the first week, most people barely notice them. Eating softer foods during those first couple of days helps, and over-the-counter pain relievers can take the edge off if needed.
What to Do if a Spacer Falls Out Early
If a rubber spacer falls out close to your next appointment (within a day or two), it likely created enough space and isn’t a concern. But if it falls out well before your next visit, contact your orthodontist. They may need to place a new one so that enough separation exists by the time your braces go on. Don’t try to push a spacer back in yourself.
Asthma Inhaler Spacers: About 12 Months
An inhaler spacer (sometimes called a valved holding chamber) is the tube-shaped device that attaches to a metered-dose inhaler, helping you breathe in medication more effectively. These devices should be replaced every 12 months, though they can last longer if they remain undamaged and are cleaned regularly.
Replace your spacer sooner if you notice cracks in the plastic, if the one-way valve feels stiff or stuck, or if the chamber looks visibly damaged. A faulty valve can block airflow, meaning you’re getting less medication than you need.
Why Cleaning Extends an Inhaler Spacer’s Life
Most inhaler spacers are made from plastic or polycarbonate, materials that build up static electricity on their inner surfaces. That static charge attracts medication particles and traps them against the walls of the chamber, reducing the dose you actually inhale by up to 50%. Regular washing prevents this.
The best approach is to wash your spacer weekly, ideally at the end of the day after your last dose. Disassemble it, then immerse the parts in lukewarm water with a few drops of regular household dish soap. Shake the parts in the water and gently wipe with a soft cloth. Let everything soak for about 15 minutes, then place the parts on a clean towel to air-dry overnight. Don’t rinse off the soap from the inside of the chamber or rub it dry. The thin layer of detergent left behind acts as an anti-static coating, keeping medication from sticking to the walls. You can rinse the mouthpiece to remove the soapy taste. Never put a spacer in the dishwasher.
The next morning, reassemble the device and check that the valve moves freely. A valve that sticks after cleaning may need the spacer replaced entirely. Keeping up this routine is the single best thing you can do to get the full dose from your inhaler and keep the spacer functional for its full lifespan.