The New Zealand Dentist Association is appalled at two anti-fluoride billboards in Hamilton, stating that "informed'' dentists vote no to fluoride.
The billboards appear on Ulster Street and Mill Street.
Local dentist, and association member Steven Pawley says the billboards are insulting, false and bordering defamation.
He says the three dentists used in the billboards are not from the Waikato, and are only stating their personal beliefs.
Mr Pawley believes these billboards go against the Dental Council of New Zealand's code of practice on advertising.