Lost or Broken Aligners
If your aligner is missing or damaged, this page will tell you whether your treatment is at risk and walk you through every step — from what to do in the next hour to how to prevent it happening again.
The good news: a lost or broken aligner is rarely a treatment emergency. How you respond in the first 24–48 hours, however, does matter.
Invisalign comfort & care begins with knowing that unexpected setbacks are a normal part of treatment — and that there is a clear, straightforward path forward every time.
Is Your Treatment at Risk?
Treatment risk depends on two factors: how long you go without a fitting aligner, and where you are in your aligner series.
Aligners work by applying consistent, gentle pressure over time. A short gap — typically less than a day or two — rarely causes meaningful tooth shifting. A longer gap can allow teeth to drift back, making your current or next aligner difficult to seat properly.
What “Difficult to Seat” Means
If an aligner feels significantly tighter than usual after a gap in wear, it means some minor tooth movement has already occurred. Do not force it. Forcing a poor-fitting aligner can cause discomfort and may damage the tray itself.
This is why acting quickly matters — not because one missed day is catastrophic, but because the longer the gap, the harder the correction.
What to Do Right Now
If Your Aligner Is Lost
- Check first. Aligners are most commonly left in napkins at restaurants, on bathroom counters, or in pockets. Check these locations before assuming the aligner is gone.
- Retrieve your previous set. If you cannot find your current aligner, insert the previous set immediately. This holds your teeth close to their current position while you arrange a replacement.
- Do not skip to the next aligner unless your orthodontist or dentist specifically instructs you to. Moving forward without completing a stage can misalign subsequent steps in your treatment plan.
- Contact your provider. Notify your orthodontist or dentist as soon as possible — ideally within 24 hours. They will advise whether to stay in the previous set, move forward, or order a replacement.
If Your Aligner Is Broken
A cracked or snapped aligner needs a slightly different assessment:
- Minor crack, still fits: Your provider may advise you to continue wearing it temporarily while a replacement is prepared, as long as there are no sharp edges that could irritate your mouth.
- Significant break or sharp edge: Stop wearing it immediately. Insert your previous set and contact your provider.
- Warped aligner (from heat exposure): Do not wear it. Warping changes the aligner’s shape and pressure points, meaning it will no longer move teeth correctly — and may move them incorrectly.
Getting a Replacement
Contact your orthodontist or dentist to request a replacement aligner. They will reorder the specific tray through Align Technology. Replacement timelines vary by provider and location but typically range from a few days to about two weeks.
Cost and Coverage
Replacement aligners are not always covered under the original treatment fee. Costs vary, but a single replacement tray typically ranges from $150–$300 out of pocket. Check your treatment contract for replacement policies before assuming coverage.
Dental insurance rarely covers aligner replacements specifically, though FSA and HSA funds can generally be applied. Confirm with your provider and insurer before paying out of pocket.
Preventing It From Happening Again
Always Use Your Case
The single most effective prevention habit is simple: whenever aligners come out, they go directly into their case — not a napkin, not a pocket, not a countertop. Most aligner losses happen within minutes of removal in public settings.
Protect From Heat
Aligners warp at relatively low temperatures. Never leave them in a hot car, near a stove, or in direct sunlight. Do not rinse or soak them in hot water.
Keep a Backup Set
Ask your provider about retaining your most recent previous set of aligners as a temporary backup. Many providers will support this practice, and it removes the urgency — and cost risk — from any future loss or damage.
A lost or broken aligner is a detour, not a dead end. The most important steps — acting quickly, keeping your previous set close, and looping in your provider — are all simple ones. With the right habits in place, most patients move through the experience with minimal impact to their treatment timeline.