Frequently asked questions

Three material thicknesses? What does that mean?

Three different material thicknesses worn over a period of four weeks for a unique and attractive smile: during each treatment phase, the patient wears three aligners, each with a different material thickness. A steady increase in pressure helps to correct the patient's teeth gently yet effectively and without any discomfort.

Worn over the gums? What does that mean?

The special aligner design also covers the gingival area (2-3 mm), whereby a greater amount of pressure is transferred and the treatment is thus more effective. 

Is it also possible to use other films?

Usage rights are subject to CA® CLEAR ALIGNER films that are certified exclusively for the CA® CLEAR ALIGNER treatment method. These films alone fulfil the necessary requirements.

Stripping? What does that mean?

In professional orthodontics jargon, stripping is also known as: IPR (interproximal reduction), reproximation, interproximal polishing, slicing, stripping, tooth remodelling or tooth recontouring.

It allows treatment with braces without the need to pull out teeth. The lateral contact surfaces of the tooth in question are made larger by removing a very small amount of enamel with the help of a sanding disc or diamond bur.

When is stripping required?

This technique is used to resolve the problem of mild crowding. 

How much enamel needs to be stripped away?

You will receive a stripping instruction with detailed stripping parameters in mm.

Which tools are required for stripping?

The lateral contact surfaces of the tooth in question are made larger by removing a very small amount of enamel with the help of a sanding disc or diamond bur.
Different instruments can be used to this effect, for instance the ASR Set from SCHEU-DENTAL: PST Set Standard: article no. 5357.1, Echarri PST Set, article no. 5341.1.

Where can I find instructions for stripping?

Stripping instructions are available online in the Treatment Manager. The instructions are available in the overall planning as well as in the download area. You will of course also receive the instructions by post along with the delivery of the relevant treatment step.

Why do the models have a special surface?

The textured surface of the models is transferred onto the aligners during thermoforming. The incident light is refracted and thus prevents reflection on the teeth. This is the reason why the aligners are virtually invisible when worn in the patient's mouth.

Why is it important to decide which product (models for thermoforming Version or Aligner Version) is to be ordered at the time of placing the order for the Set-up Prognosis?

The decision is subject to the CA certification guidelines that specify who may procure the respective product.

Do I have to use MEMOTAIN retainers after treating a patient with CA CLEAR ALIGNERS?

You do not necessarily have to combine these products. However, it is advisable to follow up the CA CLEAR ALIGNER treatment with a suitable retention plan in order to stabilise the treatment results. To this effect, CA DIGITAL recommends you to go in for the product MEMOTAIN®.

Do I have to visit any courses before I am permitted to order CA CLEAR ALIGNER products?

With effect from 1 July 2016, only dentists and orthodontists may place orders for products from CA DIGITAL. Please note that a certification from SCHEU-DENTAL is a prerequisite for ordering specific products such as the DATA and THERMOFORMING versions of the CA® CLEAR ALIGNER. Starting in the latter half of 2019, we will also be offering training courses for our products at our CA DIGITAL ACADEMY in Hilden, Germany.

Which teeth can be moved and what types of malocclusion can be treated with CA CLEAR ALIGNERS?

See "Indications".

Can I also work with attachments and elastic rubber bands when treating patients with CA CLEAR ALIGNERS?

We would like to refer to the certified CA power grips offered by SCHEU-DENTAL that are to be glued onto the tooth surface before taking an impression. They will then be included by us in the planning and forecasting process. Elastic rubber bands can be procured separately, for instance from specialist dealers such as smile dental.

What if my patient has dental veneers, bridges, crowns or implants?

There is no indication in the CA® CLEAR ALIGNER treatment method for bridges and residual dentition with implants as it is not possible to calculate the effect of compressive forces on rigid attachments. In the worst case, this can lead to the loss of the tooth or implant. It is up to the practitioner to decide whether or not to use crowns. We do not rule out the use of crowns. At the same time, however, we do not recommend it.

What types of malocclusion can be treated with a Vector®40 screw?


What exactly do I get when I order a Vector®40 screw?

When you order a Vector®40 screw, the delivery will include an aligner with an integrated Vector®40 expansion screw and a "key" or "wrench" for unscrewing it.

How does a Vector®40 expansion screw work?

Take advantage of the Vector®40 preliminary treatment method for swift transverse expansion and a reduction of treatment stages. This technique is used to resolve the problem of mild crowding. 

When is a V40 aligner required?

  • If an expansion of more than 3 mm is required.
  • In the event of anterior crowding of approximately 3-4 mm.
  • If stripping of more than 3.0 mm is required in upper jaw 2-2.
  • If stripping of more than 2.0 mm is required in lower jaw 2-2.


  • Minimum 1 step or maximum 3 steps less than conventional methods.
  • The amount of dental material that requires stripping can be reduced significantly.
  • Canines and premolars can be moved up to approximately 1 mm.
  • A mesial to distal movement is possible (e.g. transverse).
  • It is possible to change the angulation of the front teeth (e.g. distal to mesial).

When should I not use a Vector®40 screw?

In the event of edge-to-edge bite, prominent overbite, open bite or simply for treating a jaw.

Who decides whether preliminary treatment with a Vector®40 screw is necessary?

If the practitioner hasn't already made a note of this, then preliminary treatment with a Vector®40 screw can well be a recommendation from CA DIGITAL. This is, however, subject to subsequent examination by the practitioner and consultation with the patient.

What happens if an Aligner is damaged?

As custom-made products, aligners are subject to the current ruling on returns, replacements and substitutes that states the following exception:
"individual, made-to-measure items or custom-made products are exempted as a replacement of an item or as a substitute for the original." 

In principle, it is possible to fabricate a new aligner. This is, however, subject to additional charges.

How do I proceed upon completion of the preliminary treatment with the Vector®40 screw?

Once treatment is successfully completed with the Vector®40 screw, please send us a new impression or scan in order to request a new setup.”

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