Which term describes the addition of fluoride to drinking water to prevent tooth decay?

• A. Chlorination
• B. Fluoridation
• C. Ozonation
• D. Desalination

Answer: (B)

Fluoridation is the term for adding fluoride to drinking water to help prevent tooth decay. It works by strengthening tooth enamel and making it more resistant to acid attacks from bacteria in plaque. When fluoride becomes part of the tooth's mineral, it forms a tougher, less soluble material, so acids don’t dissolve the enamel as easily. The other processes listed are chlorination (adding chlorine to disinfect water), ozonation (adding ozone for disinfection), and desalination (removing salt from water), none of which describe adding fluoride for dental health. The fluoride level is kept at a safe, low amount to provide decay prevention without causing harm.