- Austria / Österreich
- Bosnia ed Erzegovina / Босна и Херцеговина
- Bulgaria / България
- Croazia / Hrvatska
- Repubblica Ceca e Slovacchia / Česká republika & Slovensko
- Finlandia / Suomi
- Francia / France
- Germania / Deutschland
- Grecia / ΕΛΛΑΔΑ
- Italia / Italia
- Paesi Bassi / Nederland
- nordisch / Nordic
- Polonia / Polska
- Portogallo / Portugal
- Romania e Moldavia / România & Moldova
- Slovenia / Slovenija
- Serbia e Montenegro / Србија и Црна Гора
- Spagna / España
- Svizzera / Schweiz
- Turchia / Türkiye
- Gran Bretagna 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.