What technique is used to apply fluoride treatment effectively?

The tray method or varnish application is recognized as an effective technique for applying fluoride treatment due to its ability to ensure prolonged contact between the fluoride and the teeth. This method typically involves placing a fluoride-rich gel or varnish in a tray that is fitted over the patient's teeth, allowing the fluoride to penetrate the enamel and reinforce the tooth structure.

The design of the tray helps to maximize coverage of the dental surfaces and minimizes the dilution or removal of the fluoride treatment, which can occur with other methods. In the case of varnish application, the fluoride adheres to the tooth surfaces and slowly releases over time, providing a sustained effect that helps to remineralize enamel and enhance resistance to decay.

In contrast, other methods, such as direct spray application or brushing with fluoride toothpaste, may not provide the same level of systemic fluoride absorption or prolonged exposure, resulting in a less effective overall treatment. Additionally, the injection method is not typically utilized for fluoride treatment, as it is impractical and unnecessary for topical application in dental care.