Invisalign has transformed modern orthodontics, offering a discreet, comfortable approach to straightening teeth without the brackets and wires used in traditional braces. But how do clear aligners actually work, and what makes them so effective?

What Makes Invisalign Different?

Unlike fixed braces, Invisalign uses a series of custom-made clear aligners that fit snugly over your teeth. Each aligner is designed to make small, controlled movements that gradually guide your teeth into a straighter, healthier position.
The result is a treatment that is:

• Nearly invisible
• Removable
• Comfortable
• Highly predictable when guided by a trained clinician

This combination of convenience and precision is why Invisalign continues to grow in popularity worldwide.

The Technology Behind Clear Aligners

✔ 1. 3D Digital Scanning

Your Invisalign journey begins with a detailed digital scan of your teeth. Using advanced imaging technology, your dentist captures an accurate 3D model that replaces traditional moulds.

This model allows for:

• Precise analysis of tooth position
• Identification of crowding, spacing, and bite issues
• Creation of a personalised treatment roadmap

✔ 2. SmartTrack® Aligner Material

Invisalign aligners are made from a patented material called SmartTrack®, engineered to apply gentle, consistent pressure.
This helps deliver:

• Improved predictability
• Smoother tooth movements
• A snug, comfortable fit

The material is also crystal clear, making the aligners discreet throughout treatment.

✔ 3. Custom Treatment Planning With SmartForce® Features

Depending on your case, your dentist may incorporate additional features to guide tooth movement more effectively, including:

• Attachments – small, tooth-coloured shapes placed temporarily on the teeth to achieve specific movements
• Power Ridges – subtle pressure points built into the aligner for fine adjustments
• Elastic hooks (for more complex bite corrections if required)

SmartForce® technology helps ensure the aligners work efficiently, even for movements that traditionally required braces.

✔ 4. Digital Tooth Movement Staging

Each aligner set is part of a carefully sequenced plan. Invisalign’s software predicts exactly how each tooth will move at every stage.
This allows for:

• Controlled tooth rotations
• Gradual repositioning
• Optimised force application
• Minimal discomfort

You typically change to a new aligner every 1–2 weeks, depending on your dentist’s recommendations.

How Aligners Move Your Teeth

Clear aligners work using principles similar to braces: applying continuous, gentle pressure signals the bone around a tooth to reshape. This process, known as bone remodelling, allows teeth to shift into new positions over time.

Here’s how it works:

1. The aligner applies pressure to the tooth
2. The bone on one side breaks down slightly (resorption)
3. New bone forms on the opposite side (deposition)
4. The tooth gradually moves into its new position

Although the movement is small with each aligner, the cumulative effect results in a noticeable transformation.

Why Treatment Times Vary

Some cases can be completed in a few months, while more complex issues — such as significant rotation or bite correction — may take longer.
Factors that influence treatment time include:

• The complexity of tooth movement required
• How consistently aligners are worn (20–22 hours per day is essential)
• Gum and bone health
• Whether additional features are needed (attachments, elastics, refinements)

Benefits of Invisalign’s Scientific Precision

✔ Highly Predictable Results

Digital planning allows your dentist to map out your entire treatment before you even receive your aligners.

✔ Comfort and Convenience

With no metal brackets or wires, aligners reduce irritation and make cleaning your teeth much easier.

✔ Discreet Appearance

Because aligners are clear, most people won’t notice you’re wearing them — ideal for adults and teens who want subtle treatment.

✔ Removable for Eating and Cleaning

This reduces the risk of tooth decay and staining during orthodontic treatment.