Professional organizations
- Dutch Association of Orthodontists 'NVvO'
- Dutch Dental Association (KNMT)
- Dutch Cleft Palate Craniofacial Society (NVSCA)
- Dutch Society for the study of orthodontics (NVOS)
- American Association of Orthodontics (AAO)
- American Cleft Palate-Craniofacial Association (ACPA) and Cleft Palate Foundation (CPF)
- American Board of Orthodontics (ABO)
- College of Diplomates of the American Board of Orthodontics (CDABO)
- Angle Society of Europe (ASE)
- Charles Tweed Foundation
- Craniofacial Society of Britain and Ireland
- European Federation of orthodontic Specialist Associations (EFOSA)
- European Federation of Orthodontics (FEO)
- European Postgraduate Students Orthodontic Group (EPSOS)
- International / American Association for Dental Research
- Network of Erasmus Based European Orthodontic Programs (NEBEOP)
- World Federation of Orthodontists (WFO)
- World Federation of Postgraduate Orthodontic Students (WFPOS)
- WFO affiliate organizations