Final answer:
The application of fluoride gel or varnish in CAMBRA is recommended as needed, determined by the patient's individual risk assessment for dental caries rather than at fixed intervals.
Step-by-step explanation:
Based on the CAMBRA (Caries Management by Risk Assessment) approach to care, the recommended intervals for professional application of fluoride gel or varnish are not strictly tied to a set schedule such as every 6 months or annually. Instead, the application of fluoride treatments should be individualized based on the patient's caries risk assessment. Therefore, the correct answer is D. As needed based on risk assessment. For patients at high risk of dental caries, the application may be recommended more frequently, whereas for those at lower risk, the applications may be less frequent. CAMBRA stands for Caries Management by Risk Assessment, and it involves assessing a patient's risk for developing dental caries (cavities) and tailoring preventive and therapeutic strategies accordingly. The frequency of fluoride gel or varnish application will depend on the individual patient's risk factors such as previous history of cavities, presence of dental plaque, and dietary habits.