How Invisalign works, and when it is the wrong choice
Invisalign moves teeth with a series of clear plastic trays, each one slightly different from the last. You wear each set for one to two weeks, and the small difference between them is what applies the force. The mechanics are the same as braces; the delivery is removable.
What the treatment looks like
- Scan and plan. A digital scan of your teeth, then a full movement plan built tooth by tooth. You see a simulation of the end result before you commit — that is the single biggest advantage over braces.
- Attachments. Small tooth-coloured bumps are bonded to some teeth so the aligners have something to push against. Certain movements, particularly rotating round teeth and moving roots, are not possible without them.
- Wear, swap, repeat. A new set every one to two weeks. Most cases run six to eighteen months.
- Checkups. Every six to ten weeks to confirm the teeth are tracking the plan. If they are not, we adjust rather than press on.
- Retainers, permanently. Teeth drift back. Retention is not the end of treatment, it is the rest of it.
The 22-hour rule is the whole treatment
Aligners work when they are in your mouth. Twenty to twenty-two hours a day is the requirement, which leaves you roughly two hours for meals. In practice that means taking them out to eat and drink anything but water, and putting them straight back in. Patients who treat that as a guideline rather than a rule end up with a longer treatment, extra refinement trays, or a result that does not match the simulation. This is the real difference between Invisalign and braces: braces do not care whether you are motivated.
What Invisalign handles well
- Crowding and spacing in the mild-to-moderate range.
- Mild to moderate overbite, underbite and crossbite.
- Relapse after previous orthodontics, which is very common.
- Adults who will not wear visible braces, which is most of the reason it exists.
When braces are the better answer
Severe crowding, large bite corrections, teeth needing significant root movement or vertical movement, and cases involving impacted teeth are all more predictable with fixed braces. Anyone who will not wear the trays consistently is also better off with braces. We will tell you plainly when that is the case rather than selling you the treatment you asked for — compare them on Invisalign vs. traditional braces, and see does Invisalign really work?
Living with aligners
Expect pressure and tenderness for a day or two after each new set — that is the teeth moving. Swapping to the new set at bedtime gets you through the worst of it asleep. Rinse the trays whenever you take them out, brush after eating before you put them back in, and never drink anything hot or coloured with them in, because they warp and stain. Keep the previous set until the new one is tracking properly.
Also available: Invisalign for teens, Spark clear aligners, and alternatives to braces for teens.
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