Water fluoridation
Health and dental organizations worldwide have endorsed its safety and effectiveness. Its use began in 1945, following studies of children in a region where higher levels of fluoride occur naturally in the water. Further research showed that moderate fluoridation prevents tooth decay.
Irene Vorrink
She also took the leading role in attempting to establish a legal basis for the fluoridation of drinking water. Though fluoridation to prevent tooth decay had been occurring in many areas across the Netherlands for years, the Supreme Court ruled in 1973 that it should be specifically provided for in the Water Supply law. Her bill to do so did not find support in the House of Representatives outside her own party, and was dropped.