An 8-year-old has extensive caries in tooth K (mandibular primary first molar). What is the best restoration?

Correct answer: A. Stainless steel crown

• A. Correct. A stainless steel crown is indicated for extensive multi-surface caries in a primary molar. It has the highest longevity and lowest failure rate, and provides full cuspal coverage until natural exfoliation.
• B. Incorrect. Composite is technique-sensitive, requires excellent moisture control, and performs poorly in large multi-surface primary molar restorations.
• C. Incorrect. A large multi-surface amalgam in a primary molar has a high failure and fracture rate.
• D. Incorrect. Glass ionomer is useful as an interim or ART restoration but lacks the strength for a large load-bearing lesion.