October 23, 2026

How Does Invisalign Move Your Teeth?

By the team at Beam Orthodontics Dundee. Reviewed by Ruaridh McKelvey, Diamond Apex Invisalign Provider

Invisalign moves your teeth by applying gentle, constant pressure through a series of custom-made clear aligners. Each aligner is shaped slightly differently from the last, so it nudges your teeth a fraction of a millimetre towards their planned position.

That pressure triggers your body’s natural bone remodelling. Bone is broken down on the side your tooth is moving towards and rebuilt behind it. You wear each aligner for 20 to 22 hours a day, then switch to the next one in the series, usually every one to two weeks.

In short, Invisalign moves teeth in five steps:

Treatment plan: Your orthodontist plans every tooth movement in ClinCheck.
Custom aligners: A series of aligners is made to match each stage of the plan.
Attachments: Small composite bumps give the aligners grip and 3D control.
Sequential movement: Each aligner achieves one small stage of movement.
Controlled forces: Gentle, targeted pressure triggers bone remodelling.

The aligners are the tool. The results come from the treatment plan behind them.

Step 1: How is an Invisalign treatment plan created?

Every Invisalign treatment starts with a plan, not with aligners. Your orthodontist designs a customised, evidence-based treatment plan using ClinCheck, Invisalign’s 3D planning software, to precisely plan each tooth movement.

First, we take a detailed 3D scan of your teeth with our iTero intra-oral scanner. Your orthodontist then uses ClinCheck to map out:

Where each tooth needs to move and in what order
How far each tooth moves at every stage
Where attachments are needed to help the aligners grip
What your finished smile and bite should look like

You can see a 3D preview of your expected result before treatment begins.

Step 2: Why does Invisalign use a series of aligners?

Invisalign uses a series of custom-made aligners to apply controlled forces that gradually move teeth into their planned positions.

Once your ClinCheck plan is approved, your aligners are made to fit your teeth exactly. Each aligner in the series is shaped slightly differently from the one before, matching one stage of your plan. Every pack is numbered, so you always know which aligner you’re on and how many are left.

You wear each aligner for 20 to 22 hours a day, taking it out only to eat, drink anything other than water, and brush your teeth. You then move to the next aligner as your orthodontist advises, usually every one to two weeks.

Step 3: What are Invisalign attachments for?

Small composite attachments bonded to the teeth act as points of force application. They give the aligner something to push against, which gives your orthodontist 3D control over how each tooth moves.

Attachments are tiny, tooth-coloured bumps made from the same type of material used for white fillings. On its own, a smooth aligner can mainly tip teeth. With attachments, it can also:

Rotate teeth
Move teeth up or down
Move the whole tooth, root and all, rather than just tilting it

Your orthodontist decides where attachments go during ClinCheck planning. They’re removed at the end of treatment.

Step 4: Do all your teeth move at once with Invisalign?

No. Each aligner is designed to achieve a small stage of movement. This is called sequential movement.

Rather than pushing every tooth at the same time, your plan moves specific teeth in a set order. Some teeth move while others stay still and act as anchors.

Once one stage is complete, the next aligner picks up where the last one left off.

Moving teeth in small, planned stages keeps the forces gentle and the results predictable. It’s also why skipping ahead to the next aligner early won’t speed up your treatment.

Step 5: How do aligners actually push teeth?

Each aligner applies gentle, targeted pressure to specific teeth, starting the movement process.

Because each aligner is shaped slightly ahead of where your teeth are now, it pushes on them as it fits into place. An attachment adds an extra push force in a precise direction. Combining these forces lets your orthodontist control the exact movement, such as extrusion, where a tooth is drawn slightly further out of the gum.

What happens inside your mouth

Each tooth is held in its socket by a thin layer of tissue called the periodontal ligament. When an aligner pushes on a tooth, the ligament is squeezed on one side and stretched on the other. That triggers your body’s natural bone remodelling:

Osteoclasts break down bone on the pressure side, making space for the tooth to move into.
Osteoblasts build new bone on the other side, holding the tooth in its new position.

This is the same biology behind all orthodontics, including braces. It takes time, which is why teeth move in small steps and why you’ll wear retainers afterwards while the new bone settles.

Why does the treatment plan matter more than the aligners?

Invisalign is just a tool. The treatment plan makes the difference.

Aligners can only move teeth the way they’ve been programmed to. The expertise behind your results comes from the orthodontist who plans every stage. A well-designed plan can treat a wide range of orthodontic problems: