A patient's chief complaint is a poorly fitting removable acrylic prosthesis for teeth #7–10; she reports low income. What is the best option to replace the removable prosthesis?

Correct answer: A. Cast metal

• A. Correct (keyed). For a durable, well-fitting removable partial denture, a cast metal framework provides superior support, retention, and longevity compared with the failing acrylic appliance — making it the best clinical replacement.
• B. An all-ceramic option is not a standard removable-prosthesis framework and is the most costly.
• C. A flexible (nylon) partial can fit esthetically but offers less rigidity/long-term stability than a cast framework.
• D. Acrylic is the cheapest but is the material that already failed; it offers the least durability and poorest fit.

Note: Debatable: given the stated low income, an acrylic/flexible appliance is cheaper, but cast metal is keyed as the best-quality replacement for the poor fit. Consider the patient's finances when counseling.