- Avstrija / Österreich
- Bosna in Hercegovina / Босна и Херцеговина
- Bolgarija / България
- Hrvaška / Hrvatska
- Češka & Slovaška / Česká republika & Slovensko
- Francija / France
- Nemčija / Deutschland
- Grčija / ΕΛΛΑΔΑ
- Italija / Italia
- Nizozemska / Nederland
- Nordijska / Nordic
- Poljska / Polska
- Portugalska / Portugal
- Romunija & Moldavija / România & Moldova
- Slovenija / Slovenija
- Srbija & Črna gora / Србија и Црна Гора
- Španija / España
- Švica / Schweiz
- Turčija / Türkiye
- Velika Britanija in 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.