- Avusturya / Österreich
- Bosna Hersek / Босна и Херцеговина
- Bulgaristan / България
- Hırvatistan / Hrvatska
- Çek Cumhuriyeti & Slovakya / Česká republika & Slovensko
- Fransa / France
- Almanya / Deutschland
- Yunanistan / ΕΛΛΑΔΑ
- İtalya / Italia
- Hollanda / Nederland
- İskandinav / Nordic
- Polonya / Polska
- Portekiz / Portugal
- Romanya & Moldova / România & Moldova
- Slovenya / Slovenija
- Sırbistan & Karadağ / Србија и Црна Гора
- ispanya / España
- İsviçre / Schweiz
- Türkiye / Türkiye
- İngiltere ve İrlanda / 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.