A good candidate for clear aligners has mild to moderate crowding or spacing, permanent teeth that are fully through, and a mouth healthy enough to start. Willingness to wear the trays around 22 hours a day matters as much as the teeth do. An exam decides it.
You have thought about this on and off since your twenties. Somewhere along the way you decided the window had closed.
So you stopped asking.
It probably has not closed. The treatment itself is worth a look if you have never had it explained.
Three things decide whether it fits. What needs moving. Whether your mouth is healthy enough to start. And whether you will actually wear the trays.
What clear aligners treat well
The cases that respond well are more common than people expect:
- Crowding, where teeth overlap because the arch does not have room for all of them
- Spacing and gaps, including a gap between the front teeth
- Minor bite irregularities, such as a slight overbite or a single crossed tooth
- Relapse after braces years ago, where teeth have drifted back out of line
- Teeth that have rotated slightly rather than dramatically
Relapse deserves singling out. A lot of adults had braces as teenagers and stopped wearing the retainer at some point.
Things shifted quietly over the following decade. That is the most common version of this by far.
Those cases are often short and straightforward. The teeth are being asked to go back somewhere they have already been.
People rarely realize they count as candidates at all.
A survey of American Association of Orthodontists members found clinicians were confident treating mild crowding in 98.8 percent of responses, and spacing in 96.9 percent. Confidence dropped as cases got more complex.
When braces are the better answer
This is the section most pages turn into a disclaimer, and it deserves better than that.
Fixed braces give more precise control over how a tooth moves. The wire attaches directly to each tooth rather than pushing on it through a tray.
That difference matters most in a few specific situations.
Severe crowding is one. Where teeth need to travel a long way, or where extractions are part of the plan, fixed appliances close spaces more predictably.
Significant rotations are another. A tooth turned well out of line is hard for a tray to grip and turn.
The same survey ranked root movement and extrusion, meaning pulling a tooth downward, as the hardest movements to achieve with aligners.
Skeletal discrepancies are the third. Sometimes the problem is how the jaws relate to each other, not where the teeth sit.
No tray addresses that. The answer may involve a specialist, and occasionally surgery.
More than half the orthodontists surveyed agreed that fixed braces give better three-dimensional control of tooth movement.
That is not an argument against aligners. It is the reason case selection matters so much.
Being told braces would work better is not a rejection. It is a plan built around your teeth.
Sometimes it comes with a referral to an orthodontist. That is the right answer when it is the right answer, and you should get it straight.
What has to be healthy first
People are often surprised that a cosmetic-sounding treatment has clinical prerequisites. Untreated decay and active gum disease both get dealt with before teeth start moving.
The reason is mechanical rather than bureaucratic. Moving a tooth means remodeling the bone around its root.
Bone that is already inflamed and receding does not respond well to being asked to do that.
Gum disease that is active during tooth movement can worsen, and teeth can loosen rather than settle into a new position. Untreated decay is simpler: a tooth that needs a filling should get one before it spends a year under a tray.
Existing crowns, bridges, and veneers need planning around too. Attachments do not bond to porcelain the way they bond to enamel.
A bridge is its own issue. It spans teeth that then cannot move independently of each other.
None of that rules you out. It changes the order things happen in.
Does age make a difference?
Age alone rules nobody out. What matters is that permanent teeth are fully through, which affects teenagers, and that the mouth is healthy enough to start, which is the question at any age. Healthy adults in their sixties and beyond are treated routinely.
| Group | What matters most | What usually decides it |
|---|---|---|
| Teenagers | Whether the permanent teeth are fully through | Timing. Treatment often waits until eruption is complete |
| Adults | Gum health and the condition of existing dental work | The examination, plus how complex the movement needs to be |
| Older adults | Bone support and gum health rather than age itself | The same assessment as any adult. Age alone rules nobody out |
The idea that there is a cutoff is one of the most common reasons people rule themselves out. Teeth can be moved at any age, as long as the bone and gums supporting them are healthy.
If you have spent twenty years assuming you had missed your chance, that assumption is worth testing rather than acting on.
The part that is up to you
The trays only work while they are in your mouth. That sounds obvious and it is the single biggest factor you control.
Around 22 hours a day is the target. That leaves roughly two hours for meals, for anything you drink that is not water, and for brushing.
In practice that means planning around lunch, coffee, and anything that runs long.
Nobody manages it perfectly. But trays that spend their evenings in a case on the counter make treatment take longer than planned. Sometimes the case stops tracking altogether.
It is worth being honest with yourself about this before starting, because it affects both the result and what you end up paying.
How candidacy actually gets decided
Not by a photograph, and not by an online quiz. A proper assessment means a digital scan of your teeth, x-rays showing the roots and the bone, and an examination of your gums.
That combination shows three things. Whether the movement you want is achievable. Whether anything needs treating first. And whether a tray or a wire is the better tool for it.
You will also get a straight answer if the answer is no. That question gets carried around for years more often than you would think.
Whether you are a good candidate for clear aligners takes one appointment to establish, and costs you nothing but the hour.
Request a smile consultation in Edmonds and find out whether clear aligners suit you. We move at your pace. No pressure, no judgment.
