dr cherry dr Mertens
Straight teeth with a bite         
In Bergheim for 30 years                      

The Team

Human. Experience. Modern.

Orthodontic practice Dr. Frank Kirsch Dr. Lukas Mertens Bergheim

Welcome to the practice for orthodontics in Bergheim with a special focus on Invisalign and modern orthodontics with fixed and loose braces!

In the more than 30 years since the orthodontic practice was founded in Bergheim, we have successfully advised and treated several thousand children, adolescents and adults with orthodontics.

We offer you a comprehensive range of services in our modern orthodontic practice in Bergheim. A beautiful smile with straight teeth and an optimal bite is the hallmark of every human being. 

The entire team at Kieferorthopädie Bergheim looks forward to welcoming you to our practice in Bergheim, Zeiss-Str. 3a, welcome.

dr Frank Kirsch, Bergheim orthodontist

KFO Bergheim, orthodontic practice Dr. Frank Kirsch Dr. Lukas Mertens Bergheim, Invisalign
KFO Bergheim, orthodontic practice Dr. Frank Kirsch Dr. Lukas Mertens Bergheim, orthodontist
dr Cherry
dr Mertens
ZA Reuter
10:56 12 Dec 22
The treatment at Dr. Mertens went without any complications and was able to finish with a great result. He is always friendly and takes a lot of time to explain everything calmly and to adapt the treatment to me individually. I have already recommended him to a friend and also... she is more than satisfied with the result :) The practice team is professional, polite and always gave me the feeling as a patient that I was in good hands there. I can only recommend the practice!read more
isabela driesersisabela driesers
21: 20 30 Nov 22
I had my braces removed yesterday and am very happy with the result! The treatment was great. The entire team is super friendly and competent. All of my questions were answered in detail at all times! The practice is modern and conveniently located. Thank you!
12: 34 13 Nov 22
We felt we were in good hands right from the start and the result was simply great. A professional team and great doctors. Everyone exudes a positive atmosphere. There were almost no waiting times. Everything well organized. I can recommend Dr. Kirsch and his team 100% with a clear conscience... recommend.read more
Miro MehicMiro Mehic
17: 07 23 Oct 22
In June I had my Invisalign treatment with Dr. Cherry completed and I'm very happy with the end result! The special thing about the treatment: I was able to carry out the treatment successfully despite a six-month semester abroad in France. The treatment went flawlessly... I could always contact Dr. Report cherry (actually happened once). I would go back to Dr. Cherry come!read more
Daniel KovacDaniel Kovac
19: 00 20 Oct 22
As an Invisalign employee, I was looking for a practice that had experience with our product and also put my interests and goals in the foreground. After some searching, a friend introduced me to the practice of Dr. Kirsch recommended. After a consultation including a treatment proposal and a... After sleeping a few nights over it, I decided to have my treatment done there, because I was given very good professional advice and my goals were taken into account. Thank you for the treatment (even if it's not quite finished yet 🙂 )read more
Sarah WachtmeisterSarah Wachtmeister
07: 17 19 Oct 22
I've been a patient for three years and I've never lacked for anything. The employees are very friendly and do their job carefully. Each process is also explained and made clear, so that you are well informed about all processes! The practice is very clean and the... Waiting times are always short. I was always happy to come to my appointments.read more
Nicola HitschmanNicola Hitschman
20: 10 12 Oct 22
On the recommendation of my sister, who is a dentist herself, I went to the practice of Dr. Kirsch and Dr. Mertens introduced. I am enthusiastic about the competence and think it's great that I was presented with the result virtually in advance. I can't wait to see the result... to see my own teeth. I immediately felt comfortable in the practice. The whole team is very nice. I can recommend the practice.read more
19: 09 09 Oct 22
dr Mertens treated my siblings and I with Invisalign and showed a lot of patience and understanding, especially with my little sister (12 years old). The results turned out really well and the overall impression was positive and really professional.
mark vancinimark vancini
14: 03 07 Oct 22
I had fixed braces as a child and the result after two years was very miserable. I was still happy when the clip was out. Years later I realized that my crooked teeth are not only unsightly but also bad for my health. So i have... started looking for a suitable orthodontist in Bergheim. At one practice, the team was unfriendly and the prices were very high. Finally, I'm with Dr. cherry / dr Lukas Mertens found what I was looking for and was first given competent advice and I was offered fair conditions. Overall, I am more than satisfied that I am being treated here.read more
10: 20 05 Oct 22
dr Mertens is a great orthodontist. Was treated by him and he was always friendly and took the time to explain everything calmly and worked out an individual solution for me, with the result I am more than satisfied. Can only recommend the practice.
Marisa NovelliMarisa Novelli
20: 02 30 Sep 22
I can always recommend this practice, was treated with my children, a super nice team and Dr Kirsch is the best for us, friendly, very patient, especially when children are afraid. You can tell the years of experience.
Yvonne GoebbelsYvonne Goebbels
13: 43 29 Sep 22
Was treated by Dr.Kirsch as a child, was always very friendly and knows what he is doing. I'll be there with my children, 2 have finished the treatment and have super nice teeth. One is still being treated, everything is going great. You get appointments very quickly, whether something is pressing or... is defective (everything is always without problems), e.g.... my daughter lost a splint, could come right over and the new splint was ready in less than 24 hours, practice is well-kept, everything is top. Doctors and team super friendly!!! I can recommend the practice!read more
Fenya WyssadaFenya Wyssada
19: 46 15 Sep 22
I have had an Invisalign treatment. The advice was very good and the prices were transparent at all times. thanks dr Kirsch and his team now have straight teeth again. I always felt comfortable in the practice.
A BeckA Beck
05: 20 09 Sep 22
We are very happy with our daughter's straight teeth. dr Kirsch and his team did a great job. The costs for the treatment were completely covered by the health insurance company. we can dr Definitely recommend cherry!
Google usersGoogle users
21: 34 27 April 22
Teeth have become relatively straight, but the result can definitely be improved! My upper canine tooth is still totally crooked and has now completely shifted again 8 years after the end of the treatment, so that the tooth is shifting my entire row of teeth. The team has always been relative... rude. If I could turn back time, I would have gone to a different orthodontist.read more
KFO Bergheim, practice award 5 stars. Award of the orthodontic practice Dr. Frank Kirsch, near Cologne with seal of quality.
KFO Bergheim, orthodontic practice Dr. Frank Kirsch Dr. Lukas Mertens Bergheim, aligners

Invisalign - the invisible braces

in our orthodontic practice Dr. Frank Kirsch, Dr. Lukas Mertens (Invisalign specialist and platinum provider) in Bergheim. 

Benefit from our high discount status!

The clear alternative to fixed braces at any age

Appointment & contact

Make an appointment for an initial consultation now or contact us.
We look forward to seeing you!

Treatment for children & adults

For children

Do you need braces? Then you are exactly right with us. A beautiful smile with straight, healthy teeth and an optimal bite is the goal of your treatment.


KFO Bergheim, orthodontic practice Dr. Frank Kirsch Dr. Lukas Mertens Bergheim, children

For adults

Healthy and straight teeth are your personal flagship and convey a positive expression: Straight teeth with a bite - at any age!


Our services