In dental plans, all of the following are considered preventive services EXCEPT:

Teeth cleaning, also known as prophylaxis, is a preventive service that helps remove plaque and tartar buildup, reducing the risk of cavities and gum disease. Regular cleanings are essential for maintaining oral health and are typically covered by dental plans as preventive care.

Fluoride treatment is a preventive measure aimed at strengthening tooth enamel and preventing cavities. This service is often recommended for both children and adults, and dental plans usually cover it as part of preventive services to help maintain overall dental health.

Oral hygiene instruction provides patients with guidance on best practices for daily dental care, including brushing and flossing techniques. This educational service is considered preventive as it empowers individuals to maintain their oral health and prevent dental issues, thus qualifying for coverage under preventive services in dental plans.