What to do if your clear retainer cracks or splits
A cracked clear retainer shouldn't be worn. Learn why, when to see your dentist, and what your options are while waiting for a replacement.
Medically reviewed by Dr. Jose, DDS — September 20, 2026
Why a cracked clear retainer needs to come out right away
A clear plastic retainer that is cracked or split should never be worn. Here’s why:
Sharp edges. A break in the plastic creates rough, jagged edges that can cut your gums, cheeks, or lips. These small injuries can become painful and infected.
Loss of fit. Even a hairline crack weakens the retainer’s structure. It can no longer hold your teeth in their corrected position, and wearing it may actually push teeth in the wrong direction.
Potential for swallowing. If a piece breaks off inside your mouth, there’s a small risk of swallowing it. This is why it’s important to stop wearing a damaged retainer immediately.
What to do right now
Remove the retainer. If you notice a crack or split, take it out and don’t put it back in until a dentist has evaluated it.
Store it safely. Place the retainer in its case (if available) or a clean container in a cool, dry place. You may bring it to your appointment to show your dentist.
Call your dentist. Contact your dental office as soon as possible — ideally the same day you discover the damage. Explain that your retainer is broken and ask about replacement options and timeline.
Ask about your teeth. Your dentist can assess whether your teeth have shifted and recommend whether you should wear a different retainer (if you have one) temporarily, or simply wait for the replacement.
Understanding your replacement options
Your dentist will discuss how to replace your clear retainer. Common options include ordering a new one from your orthodontist or lab, or having a replacement made by your general dentist. The timeline and process depend on where your retainer was originally made and your dentist’s preferred lab or supplier.
Bring your broken retainer to your appointment so your dentist can inspect it and determine the best course of action. If you have a spare retainer (some orthodontists provide extras), ask whether it’s safe to wear while you wait for the new one.
Will my teeth shift if I don’t wear my retainer for a while?
Yes, teeth can begin to move if retention is interrupted. How quickly this happens varies from person to person. Factors include how long you’ve completed orthodontic treatment, your bite pattern, and your genetics.
This is another reason to contact your dentist promptly. They know your specific case and can advise whether temporary retention strategies (like a different retainer, if available) are needed while you wait for a replacement.
Taking care of your new retainer
Once you have a replacement, handle it carefully:
- Clean gently. Use a soft toothbrush and lukewarm water, or ask your dentist for a recommended cleaning routine.
- Store properly. Keep it in a case when not in your mouth. Avoid leaving it in direct sunlight or hot cars, which can warp the plastic.
- Avoid hard foods. Don’t chew on your retainer or expose it to extreme temperatures.
- Wear as directed. Follow your dentist’s schedule (usually nightly, indefinitely, for clear retainers).
How MediMouth helps
If you’re a MediMouth member, use our provider directory to find a dentist near you who can evaluate your broken retainer and discuss replacement options. Many dental offices can order replacements quickly or refer you to an orthodontic lab. Ask your dentist about the timeline and any care instructions for your new retainer. If you’re unsure whether your retainer is safe to wear, a quick call or in-person visit will give you clear answers.
Related guides: If you’re concerned this might be an emergency or if your retainer broke with sharp edges causing bleeding or injury, see our guide “Retainer or night guard broke — is it an emergency?” For more on retainer care after braces, visit “Retainers after braces: how to wear and care for yours.”
Frequently asked questions
Can I keep wearing my clear retainer if it has a small crack?
No. A cracked retainer should not be worn. Sharp edges can cut your gums or cheek, and a compromised retainer won't hold your teeth properly. Stop wearing it and contact your dentist.
What should I do with my broken retainer right now?
Store it safely in its case (if you have one). Do not wear it. Call your dentist as soon as possible to discuss a replacement. Until then, avoid eating very hard or sticky foods if you're worried about tooth movement.
How long can my teeth move without a retainer?
Teeth can begin shifting within days to weeks without retention, depending on how long you've been done with orthodontic treatment. Your dentist is the best source for guidance on your specific timeline — contact them quickly.