Clear aligners straighten teeth using a series of custom-made transparent trays. Each tray is shaped slightly differently from your current tooth positions, so when you wear it, it applies gentle, constant pressure that nudges your teeth a fraction of a millimetre at a time. Swap to a new tray every week or two, and over months those tiny movements add up to a straight smile. That is the whole idea — here is how it plays out step by step.
The Simple Science: How Gentle Pressure Moves Teeth
Your teeth are not fused to your jawbone. Each tooth sits in a socket, cushioned by a ligament, and bone is living tissue that constantly remodels itself. When an aligner applies light, sustained pressure to a tooth, the bone on the pressure side gradually breaks down while new bone builds up on the other side. The tooth shifts, the socket reforms around it, and the new position becomes permanent. This is exactly the same biology that braces use. The difference is the delivery: instead of metal brackets and wires, the force comes from a smooth plastic tray engineered to fit your teeth almost perfectly — just not quite. That tiny mismatch between where your teeth are and where the tray wants them to be is what creates the pressure.
Step 1: Consultation and 3D Scan
Everything starts with a dentist actually looking at your teeth. At your first visit we examine your teeth and gums, take photos, and capture a scan of your bite. This matters for two reasons. First, aligners only work on healthy foundations — any decay or gum problems need treating before teeth start moving. Second, not every case suits aligners. Mild to moderate crowding, gaps, and spacing respond well; severe crowding and complex bite problems often do better with braces. A good clinic tells you honestly which group you are in at this stage, before you have spent anything.
Step 2: Your Custom Treatment Plan
Your scan becomes a digital model of your mouth, and your dentist maps out the complete journey: which teeth move, in what order, how far, and how many aligner sets it will take. You get to see the expected end result and a realistic timeline before a single tray is made. This plan is also where your cost is confirmed, since the number of aligner sets is the biggest factor in price.
Step 3: Wearing Each Set of Aligners
Your custom trays arrive and the routine begins: wear each set for around one to two weeks, 20 to 22 hours a day, removing them only to eat, drink anything other than plain water, and brush. Each new set picks up where the last one left off, moving your teeth another fraction of a millimetre along the planned path. The first day or two of each new set can feel snug — that tightness is the pressure doing its job, and it settles quickly.
The 20-to-22-hour rule is not a suggestion. Teeth only move while the trays are on, and every hour an aligner spends in its case instead of your mouth adds time to your finish date. The patients who finish on schedule are simply the ones who wear their trays consistently.
Step 4: Check-ups, Attachments and Refinements
You will see your dentist periodically through treatment — at our clinics in Damansara Jaya and Cheras, these visits are quick progress checks where we confirm your teeth are tracking as planned and hand over your next sets of trays. Some teeth need extra grip to rotate or move vertically, so your dentist may bond small tooth-coloured bumps called attachments to certain teeth; the aligner clicks onto them for better leverage. And if your teeth drift slightly off plan near the end — which is common and not a failure — a short series of refinement aligners brings them the rest of the way.
Step 5: Retainers to Hold the Result
When your last aligner comes off, your teeth are straight but not yet settled. The bone around them needs months to fully harden in the new positions, and teeth have a long memory — without support, they drift back toward where they started. Retainers prevent that. You will wear them full-time at first, then typically just at night. Skipping retainers is the single most common reason people end up needing treatment twice.
How Long Until You See Results?
Most people notice visible movement within two to three months, with front teeth often improving first. Full treatment typically takes 6 to 18 months depending on how far your teeth need to move — mild cases sit at the short end, moderate crowding toward the middle. We break down the full timeline, what speeds it up and what slows it down, in our guide to how long clear aligner treatment takes.
Frequently Asked Questions
How many hours a day must I wear them?
20 to 22 hours a day. You remove them only to eat, drink anything other than plain water, and brush. Wear time is the single biggest factor in whether your treatment finishes on schedule.
How often do I change to a new set?
Usually every one to two weeks, as instructed by your dentist. Each set is slightly different from the last, so changing on schedule keeps your teeth moving steadily along the planned path.
Do I still need to see the dentist?
Yes. Periodic check-ups let your dentist confirm your teeth are tracking as planned, hand over your next sets, and catch any drift early. Dentist supervision is what separates safe, predictable treatment from mail-order shortcuts.
Curious whether your teeth are a good fit? Learn more about clear aligners at Bunny Dental in Cheras and Damansara Jaya, PJ, compare aligners vs braces, or see what clear aligners cost.
Want to See If Aligners Suit You?
Book a free assessment at our Damansara Jaya or Cheras clinic. We will scan your teeth and show you exactly how your treatment would work.