Sorin Mitroi Marija Dudar Mareen Borowetzke Simone Linden DR. NESSELRATH Jana Palic Nagihan Sahinbas


Our team is made up of experienced orthodontists and practice staff. We all share the same passion to provide the best possible treatment for our patients. We don't just do a good job – we love our job!

Sorin Mitroi

is a trained dental technician who previously worked as the manager of a dental laboratory. He has worked in our in-house surgical lab since 2005, where he has independently created various types of orthodontic treatment systems. To compensate for his hard work in the laboratory, Mr. Sorin relaxes with sport and music after work.

Jennifer Kipka

It was always Jennifers dream to become a qualified dental assitant. She approaches her work with enthusiasm - and learns something new every day. It was the combination of state of the art technology and working with friendly people that motivated her from the very start in her choice of apprenticeship. And Jennifer also has defined tastes outside of work - as her hobby is karate.

Alessa Mustafov

started her apprenticeship as a dental assistant in our practice in 2013 and currently works in reception. Her tasks include welcoming patients and scheduling appointments. When she is not at work, Alessa dedicates as much time as possible to her hobby, as she is an enthusiastic volleyball player.

Vivien Rupprecht

Vivien knows our Office since her own treatment. Now her ambition is to help others to get a beautiful and healthy smile. She began her training to become a qualified dental assistance with us and completed it successfully. Vivien loves to relax after a hard day at work. She does this best by taking photos while she is in nature.

Mareen Borowetzke

is a qualified dental assistant. She is always ready to listen to our patients' requests and needs and is a great support for us in many areas of treatment. Ms Borowetzke is well versed in invisible systems as there are aligner therapy and lingual technique. When her work is done, Ms Borowetzke pursues a number of interests, which include sports, fashion and shopping.

Simone Linden

studied dentistry at the University of Düsseldorf. She has been working in our practice since 2012 towards her qualification as a specialist orthodontic surgeon, and is particularly interested in the area of physics in this field. Ms Linden comes from a family of health professionals. When she is not at work, she is a keen sportswoman.

Kieferorthopäde Dr. Achim Nesselrath

is a doctor and orthodontic specialist. He studied medicine and dentistry at the Universities of Aachen (Germany), Bern (Switzerland), San Antonio, Texas (USA) and Rio de Janeiro (Brazil). After two years as a dentist in a local practice, he worked as a doctor in maxillofacial surgery at the University of Cologne. He completed his training as a specialist orthodontic surgeon at the Humboldt University in Berlin and in a specialist practice.

- certified specialist for lingual orthodontic treatment by DGLO

- certified myofunctional therapist by DGMFT

- Diplomate of the German Board of Orthodontics and Orofacial Orthopedics

- expert in the council of insurances and doctors Gemeinsamen Bundesausschuss (G-BA)

- reviewer (Berufsverband der Kieferorthopäden, Berufsgenossenschaft, insurances)

- Involved in national and international training and lecturing

- Author of a specialist textbook

- Numerous published articles and papers 

- Office and own practice since 1998 

- Accredited to train orthodontists since 2003


Dr. Nesselrath is married with 2 children.


Memberships and commitments

Professional Association of German Orthodontists (executive board of Germany 2005-2011, executive board of North Rhine 2002-2011, chairman of Düsseldorf since 2001)

German Board of Orthodontics and Orofacial Orthopedics (executive board 2010-2014)

DGKFO Deutsche Gesellschaft für Kieferorthopädie

DGLO Deutsche Gesellschaft für Linguale Orthodontie

Jana Palic

completed an apprenticeship as a dental assistant in our practice. She heads up the reception with characteristic energy and verve. As our main administrator, she is also the person to speak to about any invoicing queries you might have. As horses are her great passion, Ms Palic is most likely to be found at the riding stables after work.

Mehtap Yazir

completed an apprenticeship as a dental assistant in our practice, during which she successfully qualified as a specialist orthodontics assistant. Ms Yazir manages all our patient treatment processes and is our expert in invisible and incognito systems. Ms Yazir loves to relax after a hard day at work. She is passionate about reading, cooking and her cats.

Nagihan Sahinbas

worked in our practice as well as another dental surgery during her training. She is well known for her friendly manner. She accompanies our patients during treatments with considerable expertise and empathy. In her free time, Ms Sahinbas is a big music fan.

Dr. Dennis William Hickey

completed in addition to a commercial vocational training a degree in business administration. The interest in a filigree craftsmanship finally brought him to dentistry. During his studies at the Westfälische Wilhelms-Universität in Münster, he discovered his enthusiasm for orthodontics. After one year in a dental practice near Münster, Dr. Dennis W. Hickey continues his training as an orthodontist in our practice. The years of work as a manager of a language course in Ireland have trained his experience especially in dealing with young people. When he's not traveling the world, he prefers to spend his free time in the water or on the golf course.

Maria Franke

Maria has been training in our practice since 2018. She enjoys spending her free time with her dog.

Alfred Wessling

is a trained dental technician and has been working in orthodontics for 26 years. During this time, he worked both in orthodontic specialist laboratories as well as in a practice laboratory. His work includes the entire field of orthodontic dental technician.

He likes to spend his free time with Taekwondo and even works as a coach of a youth team. Likewise, he likes to shake a leg together with his girlfriend in a dancing school.