You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The first ADA approved fluoride toothpaste in the year: and explain in detail?
In 1955, the stannous fluoride dentifrice became the first dentifrice recognized by the Food and Drug Administration (FDA) as an effective tooth decay preventive product. 
The first fluoride dentifrice was accepted by American Dental Association (ADA) in 1964. It is called CREST.

Essentials of preventive and community dentistry
Soben Peter
5th edition
page no. 261