Most surgical instruments are manufactured from which material?

• A. Stainless steel
• B. Copper
• C. Lead
• D. Aluminum

Answer: (A)

Instruments used in surgery must endure repeated sterilization, resist corrosion, hold a sharp edge, and be biocompatible for short-term contact with tissues. Stainless steel provides a reliable combination of these properties. The chromium in stainless steel forms a passive oxide layer that prevents rust and staining, allowing tools to be heat-sterilized or chemically sterilized without degrading. It also offers the strength and hardness needed for precise cutting and grasping, while remaining durable and relatively easy to manufacture. Copper, lead, and aluminum don’t meet these needs as consistently: copper can wear and corrode over time, lead is toxic and too soft for precision tools, and aluminum can be less resistant to sterilization-related corrosion and deformation. Hence, most surgical instruments are made from stainless steel.