In 1999, Dr. Joyce Seo worked at the department of oral maxillofacial surgery in Dunedin hospital as a house surgeon where she gained vast experiences relating to trauma management of head and dentition. In 2006, she completed Progressive Orthodontic Seminars, a 2-year course designed to equip general dentists with a special interest in orthodontics. Since then, she has been practising general dentistry along with orthodontics, children’s dentistry and treatment with nitrous oxide gas (happy gas).