- Áustria / Österreich
- Bósnia e Herzegovina / Босна и Херцеговина
- Bulgária / България
- Croácia / Hrvatska
- República Checa; Eslováquia / Česká republika & Slovensko
- França / France
- Alemanha / Deutschland
- Grécia / ΕΛΛΑΔΑ
- Itália / Italia
- Países Baixos / Nederland
- Países Nórdicos / Nordic
- Polónia / Polska
- Portugal / Portugal
- Roménia; Moldávia / România & Moldova
- Eslovénia / Slovenija
- Sérvia; Montenegro / Србија и Црна Гора
- Espanha / España
- Suíça / Schweiz
- Turquia / 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.