Dentists, oral cavity specialists, are acting outside their areas of expertise when with the health damage from fluoride in thyroids, brains (lowered IQ and ADHD), bones (broken hips and arthritis), kidneys, and cancer etc. and that is unethical. 

They are not oncologists, pharmacologists, toxicologists, endocrinologists, neurologists and epidemiologists. 

"Follow the money" to learn the truth.