• Austria: www.voek.info
• Belgium: www.buos.be
• Croatia: www.orto.hr
• Cyprus: www.cos.com.cy
• Czech Republic: www.orthodont-cz.cz
• Denmark: www.d-or-s.dk
• Estonia
• Finland: www.apollonia.fi
• France: www.ssfodf.org
• Germany: www.bdk-online.org
• Greece: www.grortho.gr
• Iceland
• Ireland: www.orthodontics.ie
• Italy: www.sido.it/space/default.htm
• Luxembourg: www.orthodontielux.lu
• Netherlands: www.orthodontist.nl
• Norway: www.kjeveortopediskforening.no/c-17-English.aspx
• Poland: pto.info.pl
• Portugal: www.spodf.pt
• Serbia
• Spain: www.sedo.es
• Sweden: www.sof.w.se
• Switzerland: www.swissortho.ch
• Turkey: www.tod.org.tr
• United Kingdom: www.bos.org.uk

• World

• World Federation of Orthodontists (WFO)

• Argentina: Argentine Orthodontic Society
• Brasil: Brasilian Association of Orthodontists (ABOR)
• Canada: Canadian Orthodontic Society
• Egypt: Egyptian Orthodontic Society
• South Africa: South African Orthodontic Society
• USA: American Association of Orthodontists

• Other

• European Board of Orthodontists
• American Board of Orthodontists

• Angle Society of Europe
• The Edward H. Angle Society of Orthodontists (USA)
• Charles Tweed Foundation