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Who we are - meet the team!

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Sebastian Engelhardt obtained his degree in dental medicine in 2006 from the University of Freiburg in Germany, where he was also awarded as “DDS” in 2007. Besides working as a general practitioner, he specialized in Periodontology and Implant Therapy, in which he obtained his MSc in 2013 and was named “Specialist in Periodontology” by the EDA in 2015. He is practicing in Switzerland since 2010 as a general practitioner with a special focus on healthy and stable gums, as this clearly is the foundation of a sustainable oral health. Sebastian is fluent in French, English, and German.


Katerina Seintou graduated from the Aristotle University of Thessaloniki, Greece in 2006. After working as an intern for a year in a private practice in Thessaloniki, she moved to Geneva in 2007 to specialise in oral surgery and dental implantology. In 2011, she obtained her DDS from the University of Geneva. For many years, she worked as a general practitioner in a dental clinic in Geneva. She took a training course in medical hypnosis in 2017, which she has been actively practicing since 2018. She also holds a university/hospital dentist position, where she is responsible for dental care under general anaesthesia within the Geneva canton. Katerina is fluent in French, English and Greek.


Wolfgang Johannes has owned his own orthodontic practice in Geneva since 2004. From 2003 to 2013 he was also responsible for the orthodontic division at Planète Dentaire C1 in Geneva Charmilles.

After his bord exam in 1998 at the University of Saarland in Germany, he worked for two years in an orthodontic practice in his area, before attending the postgraduate training at the University of Geneva from 2000 to 2003. 

He is a certified practitioner of the "Speed" and "Incognito" systems, and his reputation is based primarily on his mastery of the INVISALIGN system, in which he is a Diamond Practitioner.

Dr. Johannes is a native German speaker and speaks fluent French and English. Dr. Johannes is available for consultation at our practice on Wednesdays and/or Thursdays.


Johana Taieb graduated from the Catholic University of Leuven in Belgium in 2009. She specialized and obtained her master in Periodontology in 2012 at the same university. Having arrived in Switzerland in 2013, she practiced general dentistry for five years for a group of private clinics. In 2018 she decided to shift her practice to pedodontics and has worked for the past four years exclusively with children. She works at the public dental school service of the canton of Geneva, as well as a teacher at the school of dental nurses in Geneva. Patient and good listener, she makes every effort to treat children in an atmosphere of trust. She speaks French and English.


Nadine Pillin graduated from Geneva's School of Dental Hygienists in 2006, and has worked in private practices and dental clinics ever since. As a member of “Swiss Dental Hygienists”, she regularly practices continuous training. She is also trained in practicing local anesthesia for painless care. She is very calm in nature, enjoys personal interaction with her patients and is willing to adapt her treatment method to you and your requests. 

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Jacqueline Rudaz graduated from Geneva's School of Dental Hygienists in 2009, and has worked in several private practices in Geneva since. She is focussing on giving you invaluable advise on how to keep your teeth clean and healthy in the long term.

You will love her kind and gentle attitude! 

Jacqueline speaks Spanish, French and English.


Yessica Wehrli has graduated from the Geneva School of dental hygienists in 2018. She's also very passionate about her work and fascinated by the possibilities and techniques that modern, preventive dentistry offers. She is also qualified to do dental anesthaesia. And you can ask her anything about latest products and developments.

You'll appreciate her personalized hints and tips concerning your individual situation and needs. 

Jessica is a native Spanish speaker, and fluent in French an English.


Christine Dal Zotto has gotten her diploma as a certified dental hygienist in Geneva. She will greet you with a lot of charme and energy, and you will quickly appreciate her passion for her job, combined with an enormous amount of professional experience. 

Christine is at the office on Wednesdays and/or Thursdays. She speaks French, English, Italian, and German.


Marina Costa & Claudina Simao are our certified dental assistants. They both graduated from the CFPS in Geneva in 2019 and 2000, respectively. Besides administrative tasks they answer the phone and welcome you with great charm, assist the doctors in the chair during the treatments, and ensure the cleanliness and sterility of the instruments and materials. They are happy to respond to any queries you may have.

The last members to join our team are Fatos Sert and Abigaelle Cortembos, who are both being trained as certified dental assistants. Both of them show an exceptional interest in their future job and maintain a great spirit of enthousiasm and responsability.

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