Redefining innovation

Treat tooth displacements effectively

Combine your professional competence and know-how and our expertise. Broaden your therapy portfolio for your patients trough our unique concept and high scientific standard. As a reliable partner for transparent tooth correction we offer dentists and orthodontists a full-service-package.

IDS 2019

Visit us

The IDS is the world's leading trade fair for the dental community, which ensures sustainable success as a platform for innovations and market trends. The international fair in Cologne is the meeting point for all market participants in the field of dentistry and dental technology.

Of course, we will also be there as an exhibitor. We are happy to present you our concept and our products and show you possible forms of cooperation.

Our events at IDS

From 3D to 4D - Lecture on dynamic 4D clear aligners and the future of orthodontics by Dr. Sherif Kandil.

You are already a K Clear provider?

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Our full-service-package

You take care of your patients as usual, our experienced specialists develop treatment plans and based on that our transparent Aligners. 

Thus you broaden your treatment spectrum and guarantee your patients a high standard treatment at the same time.

By experts, for experts

Treatment plans provided by our team of doctors

All our treatment plans are developed by our experienced team of doctors. The aligners necessary for the treatment and appropriate instructions will be sent directly to your practice. This ensures the optimum impact of our K Clear Aligners. 

Trough the support of our experienced doctors you will be able to correct teeth misalignments effective and cost-efficient on a simple way. Our experts will support you from the first impression to the completed treatment result. To ensure highest scientific standards all communication takes place trough our specially developed portal.

In case you have remarks concerning your cases and specific treatment plans our doctors will take those into account.

Day by day we convince our customers from all over the world of us and our products. Let us convince you, too!

What our customers say

As the owner of Dental Excellence, the only Smile Makeover Centre of its kind in the United Kingdom, Dr. Robbie Hughes has made a name for himself as celebrity dentist. He is responsible for Jurgen Klopp’s smile and the flawless teeth of the Brasilian soccer players Philippe Coutinho und Roberto Firmino.

Since 2016 he successfully treats misalignments with the transparent aligners K Clear by K Line Europe, Germany.

The close customer support is what we like very much. The exchange of information is always quick and simple. Results are as agreed always.


Mülheim an der Ruhr, Germany

A scientifically sound work and best results for my demanding patients.


Düsseldorf, Germany

After years of experience with Clear Aligner systems, K Line is the most effective and scientifically sound system on the market for me. The team is competent and always very helpful. K Line has proven to be a very reliable company for me and my patients


Liverpool, UK

Very good customer service and support. The delivery of the rails is very fast. As an orthodontist, I can only praise the consistent quality of treatment success.


Meerbusch, Germany

Our practice is located in the WDR Arkaden of Cologne with many demanding patients also from the media industry. Therefore, we attach great importance to cosistently lasting quality of the results. So far we are very satisfied with K Line.


Cologne, Germany

I’ve been treating patients with Clear Aligners for many years, but K Line offers the fastest, most effective system I’ve used! The support that I’ve received from Dr. Kandil and his team is the best in all areas of dentistry!


Abu Dhabi, UAE

Not the software or the material alone distract K Line from other Clear Aligner manufacturers. The reciprocity of the K Line team sets it apart from other companies. 


Haryana, India

Process of treatment

You will gain access to our portal for doctors. There you can easily upload clinical photos and X-rays of your patient. You can send us impressions you made of your patient’s teeth by post. 

About 3-5 days after all necessary documents have been received and accepted by us, we will send you a first treatment plan, which includes a 3D simulation of the results.

This plan shows the teeth movement needed and is developed by dental professionals for each patient individually.

Our K Line experts exactly know the pressure and the unique Design of our Aligners, which ultimately lead to the predicted tooth movement.

Due to our 3D simulation you can already show your patient the final result at this time. Furthermore the treatment plan gives an overview over the treatment duration.

If necessary you are able to submit change requests or adjustments. After that you can accept the treatment plan on our portal. You are able to control the treatment of your patient at any time.


After you have accepted the treatment plan, the Aligners for your patient will be produced. This usually takes 12 working days of production. So you are going to receive your Aligners not later than 3 weeks after you have confirmed the plan.

When your patient visits your practise you provide him a certain number of Aligners. The number depends on type and duration of the treatment. During regular follow-up visits you will monitor the course of treatment and hand your patients a bundle of new Aligners.

ASR or placing of attachements can be necessary. Required material is noted on laboratory report. Each treatment will be completed by the insertion of a retainer.

Of course we are at your side at any time.

Advantages of our concept


We are devoting ourselves to perfection and use only premium materials in the production of your Aligners.


We provide you a detailed schedule from submission of the documents to the delivery of our Aligners. Our production is attuned to that to provide you optimal frequency of visits.


We offer flexibility in our work and in our product portfolio. In case you have capabilities for supporting the Aligner production we are pleased to adopt them and to lower your costs even more. Thus you can provide your patients the optimal product and service at the same time.


K Line collaborates with specialists and dental professionals, who have considerable experience with K Clear Aligner treatments. Therefore we guarantee you and your patient the best possible treatment and the predicted result.


Based on our self-developed Aligner design we offer the most effective technology in the field of dentistry and orthodontics. For us precise tooth movement has the highest priority. We are applying newest 3D technology and investing in the future of dentistry.


Our customer support is reliable, fast and friendly. Furthermore you can reach us through our portal


Treatment of an open bite with the K Clear System (german)
4-D printing
Widening the scope of aligner application
Predictable results using Clear Aligners
Aesthetic alignmnet of teeth using Clear Aligners
Traumatic bite resolution using K Clear Aligners

4D Dynamic Clear Aligners

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More about science

our commitment

We all heard about 3-D printing, what does 4-D
stand for?

   Yes, that is true that we have been hearing lately only about 3-D printing, nowadays 4-D represents the dimension of time. 4-D refers to additive manufacturing or printing of special materials that have certain memory characterisation built in a specific layering system on a 3-D printer, yet was designed or using CAD on a software that dictates the material reshaping and response to stimuli by time.

Can you tell us more about your recent activities
in concern to 4-D technology?

   After I patented the idea of 4-D printing in orthodontics, I moved on to applying this technology in our R&D labs in K Line Europe in Düsseldorf, Germany. 4-D printing technology has been shifting engineers’ opinions and even many in the medical field on the possibilities and chances that have been unleashed after the introduction recently of this technology. I have been focusing on applying this science to clear aligners and also on orthodontic wires using advanced 3-D printers and re-engineered Meta-materials.

 Since I would consider myself as an experimenter, I am currently applying the 4-D printing concept of therapy on my own teeth to manufacture clear aligners, I am strictly recording all details as I will be publishing results in a scientific study after treatment completion.

How does 4-D change medicine in general and
orthodontics in particular?

   I believe in the next two years 4-D printing will
be changing many approaches we currently use to treat our patients. If you search online for 4-D you will find so many results and can even discover how medicine in particular will have the first and biggest impact with this technology. Bioengineers, for example, are trying to apply 4-D printing technology in replacing some tissue parts or even manufacturing implants and splints that are placed in our body. This could save many people’s lives due to the fact that the 4-D printed objects can change their shape inside the body to conform to what exactly needs to be replaced without the need for multiple surgeries.

  In orthodontics, we will be able to provide patients a much more precise treatment that exactly meets their needs through customising the clear aligners or the orthodontic wire to change its shape when placed in the oral cavity to the requested final result. So it is crafting the final result with much more precision and with a smaller amount of clear aligners or wires so that only 1–2 aligners or 1–2 orthodontic wires are needed for the whole treatment.

What are the challenges that current clear aligners and fixed braces face in the market?

  Currently, I believe there are three main challenges we face in orthodontics when it comes to clear aligners or fixed orthodontics. First is the manufacturing process, as there are many steps when manufacturing clear aligners, thus rendering the final result less accurate, more expensive, more time consuming and more control required. Second is the complexity of applying the exact designed forces on the software for manufacturing the clear aligners, you might need accessories, more attachments on the teeth, etc to overcome the limitations of clear aligners. Third, is the comfort of the patients as with clear aligners or braces patients need numerous amounts of aligners or wires to be changed throughout the treatment.

How will 4-D technology tackle these problems?

 4-D technology promises to solve the aforementioned points and more. A short explanation of how this works is as follows. Teeth are normally 3-D scanned, then through the 3-D CAD software, aligners or orthodontic wire is made as a negative replica of the model stage representing the corresponding movement that shows where and how teeth need to be moved. The software allows you to put in joints and layers that allow contraction at one side and expansion on the other, and thus on the 3-D software we could stage all the aligner or wire shapes that will be self-morphed by the material. The object (i.e. aligner or wire) is 3-D printed using special Meta material that is responsive to the built-in software joints and layers. When the object is placed in the mouth there are fortunately the two most effective stimuli for the material to change its shape which is salivation (i.e. fluids) and 37 degree body temperature (i.e. heat).

  So simply, the patient wears an aligner or wire on brackets that keeps changing its shape gradually to reach the final form through applying light continuous forces on teeth. Each aligner or orthodontic wire can be worn for over 5 months depending on the movements that were programmed on the software from the initial planning stage.

How would you describe the advantages that
will be implemented in orthodontics using
the 4-D concept?

   The advantages are quite clear, as patients will
enjoy a more friendly treatment where they don’t have to visit their orthodontist as regularly as they used to as this coincides with the recent approaches of distant treatments applied in orthodontics nowadays. Also many treatments won’t need the refinements as they did before, such as the clear aligner treatments, which has had negative experiences. Most of all, the precision of force application and distribution is way more precise as with the software, the exact force, amount and time will be controlled; furthermore the aligner thickness can be altered depending on the need and can be controlled throughout the whole treatment to keep the force and anchorage distribution absolutely stable and avoid the variability that was experienced with previous clear aligners systems.

When do you think this technology will be available on the market?

  We hope we can bring this technology into light
very soon, yet a rational expectation would be to
expect it to enter the market in 2019 and change
many applied current treatment concepts in orthodontics.

Technology is shifting really quickly these days,
how do you see it evolving in the next few years
in orthodontics?

  I see 4-D printing and augmented reality to be one of the game changers in medicine in the upcoming years.

The idea of Clear Aligners raised from the removable retainers which stabilize the teeth in the post-treatment position. The removable retainers are very successful option to stop the relapse phase that follows orthodontic treatment.

With more research and knowledge focusing on Clear Aligners‘ fabrication and material, the treatment outcome could be significantly improved, the treatment period could be shortened and post-treatment results could be conserved using the retainers. Several modifications have been added to the materials and designs of Clear Aligners to make them functioning appliances: perform the action of space closure, vertical alignment, arch expansion and distalization.

Clear Aligners have been targeted with extensive clinical research work and have been indicated for cases of mild-to-moderate crowding and spacing, relapse after initial braces treatment and constricted arches (non-skeletal).

Many practicioners could easily use clear aligners and treat their patients with, yet case selection is gold standard for the success of Clear Aligners treatment.
Pre-treatment radiographs as well as study casts are key elements for proper case selection. Digital impressions and imaging determine how teeth movement can be controlled and how final alignment would be achieved.
Human factor is also important in treatment planning, as specialized dentist or orthodontist at K Line may suggest different movement to produce better alignment. Minimal stripping of proximal teeth surfaces maybe an important step to provide some space to enhance teeth movement. A dentist should not promise a patient an ultimate treatment outcome unless the patient is generally cooperative and helpful.