How does Invisalign move teeth?

Invisalign uses a series of clear, removable aligners to gradually straighten the teeth. Every tray is custom-made for the patient and differs slightly from the ones before and after it, so the teeth are guided gently and step by step into their target position. The aligners are made of a smooth, comfortable plastic that fits over your teeth. Each one is worn for about two weeks before it is replaced by the next aligner in the series. The length of an Invisalign treatment depends on the patient's individual needs but is usually shorter than with traditional metal braces.

What is the biomechanics behind it?

The biomechanics of Invisalign treatment are based on applying a controlled force to move the teeth into the desired position. The aligners deliver that force through their shape and fit on the teeth. The shape is designed so that force is directed at specific teeth in a specific direction, and as the patient progresses through the series of aligners, that force is increased step by step. The fit of the aligners matters just as much — they have to sit snugly on the teeth to transfer the force effectively.

Invisalign uses advanced computer software to build a treatment plan that takes into account the patient's specific needs and the desired final position of the teeth. The aligners are then manufactured according to that plan to make sure they apply the force needed to move the teeth in the right direction.

Can root resorption be caused by Invisalign?

It is possible for root resorption to occur during Invisalign treatment. Root resorption is a process in which the body breaks down enamel and dentin, weakening the tooth and making it more sensitive. This can leave the tooth fragile and, in some cases, prone to fracture.

A number of factors can contribute to root resorption during Invisalign treatment. One factor is the amount and type of force applied to the teeth. If the forces the aligners apply are too strong, the body can weaken the tooth to make it easier to move. Another factor is the length of treatment — the longer treatment runs, the higher the risk of root resorption.

It is important to note that root resorption during Invisalign treatment is rare and is usually reversible once treatment ends. Still, patients should work closely with their dentist or orthodontist throughout treatment to make sure the forces applied to the teeth are appropriate and the treatment is carried out as effectively as possible.

What role does good planning play in Invisalign treatment?

Good planning is critical for Invisalign treatment because it helps make the treatment as effective as possible. Thorough planning ensures the treatment fits the patient's individual needs and goals and that the aligners are designed to move the teeth into the desired final position.

The planning phase starts by defining the starting position of the teeth and the desired end position. A treatment plan is then built that shows the movements of the teeth from start to finish. This plan is used to manufacture the aligners needed to treat the patient.

It is important that the treatment plan is built carefully, so the aligners move the teeth in the intended way and the treatment is as effective as possible. Good planning can also help the treatment finish faster, because it ensures the teeth are moved as efficiently as possible.

Does experience matter?

Yes, experience can play an important role in planning Invisalign treatment. A dentist or orthodontist with a lot of Invisalign experience will be able to build a treatment plan that is tailored to the patient's individual needs and goals and moves the teeth in the most effective way. They will also be able to identify and solve problems or challenges that may come up during treatment.

What role do attachments play?

Attachments are small, polished plastic bumps that are fixed to certain teeth to support tooth movement during Invisalign treatment. They are usually placed on the front teeth, since these are most visible and therefore especially important for the look of your smile.

The attachments are applied by a dentist or orthodontist and provide additional grip for the aligners, helping ensure they move the teeth correctly. They play an important role in transferring the force from the aligners onto the teeth and contribute to effective tooth movement throughout treatment.

Which attachments are patented by Invisalign?

Invisalign has developed a range of different attachments designed for use in patient treatment. One of them is the "Button Attachment", also known as the "I-Button" — a small, round plastic button that is fixed to the tooth. The Button Attachment is especially useful when extra force is needed to move teeth in a specific direction.

Another attachment patented by Invisalign is the "Cuspid Elevation Attachment", also known as the "C-Elevator". This attachment is used to bring the jaw into a specific position, which sets the teeth up in a more favorable starting position for treatment.

Which movements are patented in the software?

Invisalign has developed software that makes it possible to simulate and plan the movements of the teeth during treatment. This software, "ClinCheck", uses 3D models of the patient's teeth and jaw to build a treatment plan that shows the movements of the teeth from their starting position to the desired end position. The plan is then used to manufacture the aligners needed to treat the patient.