Seven Restorations and White Lines at the Gumline

Correct answer: B. High

• A. 'Extreme' risk is a modifier used for high-risk patients with severe hyposalivation or special needs. There is no evidence of xerostomia here.
• B. CORRECT. HIGH RISK. She has active white-spot lesions (which are active demineralization, not scars), multiple existing restorations, frequent daily sugar exposure, inadequate plaque control and irregular attendance. Under CAMBRA, ANY visible white spot or cavitated lesion in the last three years places a patient in the high-risk category before the other factors are even counted.
• C. Low risk requires no disease indicators, few risk factors and good protective factors — none of which apply.
• D. Moderate risk applies to a patient with risk factors but no active disease indicators. Active white-spot lesions are a disease indicator and override that.

Note: White spot lesions after orthodontics are subsurface demineralization with an intact surface layer. They are REVERSIBLE at this stage — fluoride varnish, CPP-ACP paste, diet change and plaque control can arrest and partially remineralize them. Do not restore them.

Correct answer: D. The orthodontic bands themselves

• A. This IS a contributor. Regular recall permits early detection, professional fluoride application and reinforcement of preventive behaviour.
• B. This IS a contributor. Demineralization requires a mature acidogenic biofilm in direct contact with enamel.
• C. This IS a contributor, and the most important one. It is the FREQUENCY of fermentable carbohydrate exposure, not the quantity, that determines how much time enamel spends below the critical pH of 5.5.
• D. CORRECT — this is the EXCEPTION. Orthodontic appliances do not demineralize enamel. They are inert. What they do is create plaque-retentive sites that are difficult to clean, so the appliance is a RETENTIVE factor, not a causative one. Enamel dissolves because acidogenic biofilm sits undisturbed on it — bands with meticulous hygiene and fluoride produce no white spots at all.

Note: The distinction between a plaque-RETENTIVE factor and a causative factor matters: removing the appliance does not cure the disease if diet and hygiene do not change.

Correct answer: D. Demonstrate the technique, then have her perform it and describe it back while you observe

• A. Video is a passive medium. It can supplement instruction efficiently but does not confirm that this particular patient can perform the technique.
• B. Written material is a useful take-home reinforcement, but on its own it is the weakest option and is limited by literacy and motivation.
• C. One-directional correction is unlikely to produce sustained change and tends to elicit defensiveness rather than engagement.
• D. CORRECT. Active, two-way instruction with a TEACH-BACK component is consistently the most effective. The patient performs the technique in her own mouth with your feedback, then explains it back in her own words — which confirms comprehension rather than assuming it, and surfaces misunderstandings immediately. Passive one-way delivery reliably produces recall without behaviour change.

Note: This item appeared two or three times in the recall, which tells you the concept is heavily weighted. The pattern to recognise: the correct answer always involves the patient DOING something and giving feedback.