A patient with significant financial limitations presents with 90% of his teeth being non-restorable. Several teeth ARE restorable. What is the most appropriate treatment plan?

The guiding principle is conservation — teeth should never be extracted when they can be retained and are strategically useful. Even in a patient with severe dental disease and financial constraints, retaining restorable teeth provides: proprioception and bone preservation, support and stability for a partial denture, and improved patient psychology. Retaining teeth and constructing an RPD is the most cost-effective, minimally invasive approach when implants are financially out of reach. Complete denture construction requires extraction of ALL remaining teeth, which is irreversible and eliminates all bone support, proprioception, and jaw stability. This should only be selected if ALL remaining teeth are truly hopeless. Since the case states several teeth ARE restorable, extracting them violates the minimum intervention dentistry principle and the ethical obligation to do no harm.