- Austria / Österreich
- Bosnia si Hertegovina / Босна и Херцеговина
- Bulgaria / България
- Croaţia / Hrvatska
- Republica Cehă și Slovacia / Česká republika & Slovensko
- Franţa / France
- Germania / Deutschland
- Grecia / ΕΛΛΑΔΑ
- Italia / Italia
- Olanda / Nederland
- Nordic / Nordic
- Polonia / Polska
- Portugalia / Portugal
- Romania & Moldova / România & Moldova
- Slovenia / Slovenija
- Serbia și Muntenegru / Србија и Црна Гора
- Spania / España
- Elveţia / Schweiz
- Curcan / Türkiye
- Marea Britanie și 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.