- Austria / Österreich
- Bosnia y Herzegovina / Босна и Херцеговина
- Bulgaria / България
- Croacia / Hrvatska
- República Checa y Eslovaquia / Česká republika & Slovensko
- Francia / France
- Alemania / Deutschland
- Grecia / ΕΛΛΑΔΑ
- Italia / Italia
- Países Bajos / Nederland
- Nórdico / Nordic
- Polonia / Polska
- Portugal / Portugal
- Rumania y Moldavia / România & Moldova
- Eslovenia / Slovenija
- Serbia & Montenegro / Србија и Црна Гора
- España / España
- Suiza / Schweiz
- Turquía / Türkiye
- Reino Unido e Irlanda / 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.