A step-by-step guide to how clear aligners move teeth, from the digital scan to your final retainer.
How does Invisalign work? Invisalign moves teeth through a series of custom clear trays, each one shaped slightly ahead of where your teeth sit today. At Levine Orthodontics in Fort Myers, Cape Coral, and Lehigh Acres, FL, Dr. Alex Levine plans each case using digital iTero scans, so patients can see a preview of their results before the first tray is ever worn.
Invisalign works by fitting your teeth with a series of clear trays. Each tray is shaped slightly differently from your current tooth position, so wearing it applies gentle, steady pressure that shifts specific teeth toward their new position.
You typically change to a new tray every one to two weeks and wear each tray 20 to 22 hours a day. Most patients at Levine Orthodontics finish treatment in 12 to 18 months, with the exact timeline confirmed once Dr. Levine reviews your scan and builds your treatment plan.
What Invisalign Is
Invisalign replaces metal wires and brackets with a series of smooth, clear plastic trays called aligners. Each tray fits closely over your teeth, is nearly invisible when worn, and is removable, which makes eating and cleaning your teeth far simpler than with fixed braces.
You wear each custom tray for about one to two weeks before moving on to the next one in the series. Every tray nudges your teeth a little further toward their final position, so the full set works together to reshape your smile in planned stages.
How the Trays Move Your Teeth
A tooth is not fixed rigidly in the jaw. It sits in a socket, held by a thin layer of tissue called the periodontal ligament. When a tray applies steady pressure to a tooth, that ligament compresses on one side and stretches on the other. The bone around the root responds to that pressure by remodeling, and the tooth gradually shifts into the new space that opens up.
This is why a brand-new tray usually feels snug: it is built to a slightly different position than where your teeth currently sit, and that small mismatch is what creates the pressure needed to move them. As your teeth respond over the days you wear the tray, the fit loosens and the next tray in the series takes over from there.
Because each stage only moves teeth a small amount, the process stays gentle and predictable rather than forcing large shifts all at once.
Why Some Teeth Need Attachments
Smooth plastic does not always have enough to grip onto, especially for movements like rotating a tooth or pulling one into better alignment. To solve this, Dr. Levine may bond small, tooth-colored attachments to specific teeth. These attachments give the aligner a defined surface to push or pull against, so it can deliver more precise movement than a plain tray could manage on its own. They are small enough to stay unobtrusive and do not interfere with the clear, low-profile look of Invisalign.
Creating Room When Teeth Are Crowded
When teeth are crowded, there is not always enough space to line them up without opening room somewhere in the arch. Depending on the case, orthodontists sometimes create small amounts of space by removing a very thin layer of enamel between select teeth, a step known as interproximal reduction. This is a minor, controlled adjustment mapped out as part of the digital treatment plan rather than something decided on the fly, and it is not needed for every patient.
The Digital Plan and Dr. Levine’s Role
Your case starts with an iTero digital scan rather than traditional molds, giving Dr. Levine a detailed 3D map of your teeth and bite in minutes. From that scan, Dr. Levine builds your treatment plan, mapping each stage of movement from your starting position to your final result. You can preview what your finished smile is expected to look like before treatment even begins.
That plan also sets your estimated timeline. Most patients complete treatment in 12 to 18 months, though the exact length depends on the complexity of your case and how closely you follow your wear schedule.
Common Concerns Invisalign Can Address
| Concern | Typically Suited to Invisalign? | Notes |
| Crowded teeth | Yes | Mild to moderate crowding is routinely treated with aligners |
| Gaps or spacing | Yes | Aligners close spacing gradually across the series |
| Overbite | Often | Mild to moderate cases; severity affects candidacy |
| Underbite | Often | Mild to moderate cases; severity affects candidacy |
| Complex bite or jaw discrepancies | Sometimes | May require braces or a different treatment approach |
When Braces May Be a Better Fit
Invisalign is not the right tool for every case. Severe bite problems, very crooked or rotated teeth, jaw growth issues, or untreated dental conditions like active gum disease or cavities can rule out aligners, at least until those issues are addressed first. For complex cases, traditional braces sometimes deliver a more predictable result. Dr. Levine will let you know at your consultation whether Invisalign is the right fit for your goals, or whether another approach would serve you better.
What a Consultation Can (and Can’t) Tell You
Your first visit gives Dr. Levine a real look at your bite, crowding, and spacing, along with an iTero scan to map your teeth digitally. That’s enough to tell you whether Invisalign is a reasonable option and give you a general sense of what treatment could involve. What a single visit cannot do is finalize your exact number of aligner stages or your precise timeline. Those details come out of the full digital treatment plan, which Dr. Levine reviews and adjusts after your scan is complete.
Your Invisalign Treatment Process at Levine Orthodontics
Step 1: Consultation and Assessment You’ll meet the team, discuss your goals, and Dr. Levine will examine your teeth and bite for crowding, spacing, and other concerns. An iTero scan creates a quick 3D map of your mouth in place of messy molds.
Step 2: Custom Treatment Planning Using your scan, Dr. Levine maps out each stage of movement, from your starting point through to your final bite correction, and gives you an estimated timeline, typically 12 to 18 months depending on your case.
Step 3: Getting Your Aligners Once you and Dr. Levine agree on the plan, your trays are ordered. When they’re ready, you’ll come in for your first sets, learn how to insert and remove them, and get your specific wear instructions.
Progress Checks You’ll return roughly every 12 to 16 weeks so the team can confirm your teeth are tracking with the plan, take additional scans if needed, and hand you your next set of aligners.
Retention Once your active treatment is finished, Dr. Levine does a final check, sometimes with a new iTero scan, before moving you into retention. Most patients wear a retainer at night for life to keep teeth from drifting back.
Wearing and Caring for Your Aligners
Aligners only move teeth while they’re actually in your mouth, which is why the standard instruction is to wear each tray 20 to 22 hours a day, removing it only to eat, drink anything other than water, or brush and floss. Falling short of that wear time slows your progress and can extend your treatment.
Day-to-day care is straightforward. Take your trays out before eating, brush your teeth before putting them back in so food and bacteria don’t get trapped against your teeth, and clean the aligners themselves gently with cool water. According to Dr. Adelina Fontes Das, an expert orthodontist in Avon and Torrington, CT, clear trays hold up best when patients stick to this kind of daily care, since hot water can warp the plastic. Store your aligners in their case whenever they’re out of your mouth so you don’t misplace them.
Frequently Asked Questions
What disqualifies you from getting Invisalign?
You may be disqualified from Invisalign if you have severe bite problems, very crooked or rotated teeth, jaw growth issues, or certain dental conditions like untreated gum disease or cavities. Complex cases may require traditional braces or other orthodontic treatments instead.
What age is best for Invisalign?
Invisalign is suitable for both teens and adults. Teenagers who have most of their permanent teeth and adults with fully developed teeth are ideal candidates. Younger children with a mix of baby and permanent teeth usually need other orthodontic options first.
What is the hardest week of Invisalign?
The hardest week is often the first week after starting a new set of aligners. You may feel mild pressure or soreness as your teeth begin to move, and your mouth may take a day or two to adjust to the new trays. This discomfort is usually temporary and a sign the treatment is working.
How many hours a day do I need to wear my aligners?
Plan on 20 to 22 hours a day, removing them only to eat, drink anything besides water, and clean your teeth. Consistent wear time is the biggest factor in staying on track with your treatment timeline.
Will I need to wear a retainer after Invisalign?
Yes. Once active treatment ends, most patients wear a retainer at night for life to protect their results, since teeth naturally tend to drift back toward their original positions afterward.
Sources. General orthodontic and clear-aligner mechanics references (standard orthodontic tooth-movement literature on periodontal ligament response and light continuous force, described qualitatively). Case details, treatment steps, and practice information from Levine Orthodontics, Fort Myers, Cape Coral, and Lehigh Acres, FL.
Related Reading
- Herbst Appliance in Fort Myers, Cape Coral or Lehigh Acres FL
- Can Invisalign Fix Overbite in Fort Myers, Cape Coral, and Lehigh Acres, FL
Content last reviewed: August 31, 2026
Ready for Your New Smile?
If you want straight teeth without metal, Invisalign may be a great fit for your goals. Dr. Levine and the team will walk you through every step, from your first scan to your final retainer, with a plan built around your case.
Schedule your visit today and find out if Invisalign is right for you.
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