All of the following are appropriate caries-management interventions for a dependent nursing-home resident EXCEPT:

Correct answer: B. Placement of pit-and-fissure sealants

• A. SDF arrests active root and coronal caries with minimal cooperation and no anaesthesia — ideal for this population.
• B. Correct — this is the EXCEPTION. Pit-and-fissure SEALANTS target occlusal caries in newly erupted teeth in young patients. Nursing-home residents present with ROOT SURFACE and cervical caries on exposed dentin, where sealants have essentially no role.
• C. Glass ionomer placed by atraumatic restorative technique releases fluoride, bonds to moist dentin and needs no electricity or suction.
• D. Saliva substitutes address the xerostomia that drives caries in these patients — polypharmacy makes dry mouth near-universal in this setting.

Note: The source key marked saliva substitutes. Sealants are the better answer: they are the only listed intervention with no meaningful application to the root-caries pattern seen in dependent elders. Flagging for group discussion.