- Autriche / Österreich
- Bosnie Herzégovine / Босна и Херцеговина
- Bulgarie / България
- Croatie / Hrvatska
- République tchèque et Slovaquie / Česká republika & Slovensko
- France / France
- Allemagne / Deutschland
- Grèce / ΕΛΛΑΔΑ
- Italie / Italia
- Pays-Bas / Nederland
- Nordique / Nordic
- Pologne / Polska
- Portugal / Portugal
- Roumanie & Moldavie / România & Moldova
- Slovénie / Slovenija
- Serbie et Monténégro / Србија и Црна Гора
- Espagne / España
- Suisse / Schweiz
- Turquie / Türkiye
- Royaume-Uni et Irlande / 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.