Dr. Stephen Tjoa completed dental school at the ACTA in the Netherlands in 1998 and attended the University of Pennsylvania, School of Dental Medicine in Philadelphia, USA from 2001-2005 where he completed his certificate in Orthodontics and Masters in Oral Biology. Currently, he maintains a private practice in Rotterdam and is the attending orthodontist of the craniofacial team at the Sophia Children’s Hospital (Erasmus MC).