- Austrija / Österreich
- Bosna i Hercegovina / Босна и Херцеговина
- Bugarska / България
- Hrvatska / Hrvatska
- Češka Republika i Slovačka / Česká republika & Slovensko
- Finska / Suomi
- Francuska / France
- Njemačka / Deutschland
- Grčka / ΕΛΛΑΔΑ
- Italija / Italia
- Holandija / Nederland
- Nordic / Nordic
- Poljska / Polska
- Portugal / Portugal
- Rumunija i Moldavija / România & Moldova
- Slovenija / Slovenija
- Srbija i Crna Gora / Србија и Црна Гора
- Španija / España
- Switzerland / Schweiz
- Turska / Türkiye
- UK i Irska / UK & Ireland
Dr Zwaan graduated from Utrecht University in the Netherlands in 1987. He is a member of Digital Dentistry Society and Nederlandse Vereniging voor Parodontologie [Dutch society of periodontics] and President of the 3D-Simplement Association. He has authored numerous scientific publications and spoken widely at international events. He focuses on implant surgery and digital dentistry, and runs a private practice in Calusco d’Adda in Italy.