- 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
Atsushi Hasegawa gained his licence to practise as a dental technician in 1996 and completed postgraduate studies at Kanagawa Dental University in Yokosuka in Japan in 1998. He then worked for 11 years in a dental laboratory in Tokyo in Japan, where he acquired specific knowledge and skills in the field of occlusal concepts. In 2008, he opened his own laboratory, Organ Dental Lab, in Chigasaki in Japan. Today, Hasegawa transfers his knowledge through lectures in Japan and worldwide. He can be reached through his website, www.organdental.jp.