- Áustria / Österreich
- Bósnia e Herzegovina / Босна и Херцеговина
- Bulgária / България
- Croácia / Hrvatska
- República Checa; Eslováquia / Česká republika & Slovensko
- França / France
- Alemanha / Deutschland
- Grécia / ΕΛΛΑΔΑ
- Itália / Italia
- Países Baixos / Nederland
- Países Nórdicos / Nordic
- Polónia / Polska
- Portugal / Portugal
- Roménia; Moldávia / România & Moldova
- Eslovénia / Slovenija
- Sérvia; Montenegro / Србија и Црна Гора
- Espanha / España
- Suíça / Schweiz
- Turquia / Türkiye
- Reino Unido e Irlanda / UK & Ireland
Dr. L. Stephen Buchanan established Dental Education Laboratories in 1989, through which he has lectured and conducted participation courses around the world.
Buchanan holds a number of patents for dental instruments and techniques, including variably tapered shaping instruments for use in endodontics. He pioneered a system-based approach to treating root canals.
He maintains a private practice limited to endodontics and implant surgery in Santa Barbara, California.