Which is not a key property of metals as biomaterials?

Metals are widely used as biomaterials, particularly in orthopedics and dental applications, due to their advantageous mechanical properties. Among the characteristics that define metals in this context, low reactivity, good ductility, and high tensile, fatigue, and yield strength stand out.

When evaluating the property of being inert in the body, it is important to recognize that while metals are generally biocompatible, they do not exhibit inertness in the same way that some polymers or ceramics might. Some metals can undergo corrosion or react with bodily fluids, leading to potential complications. Therefore, being inert is not considered a key property of metals as biomaterials; instead, their ability to withstand physiological conditions while maintaining structural integrity is more relevant.

Ultimately, the emphasis on low reactivity, good ductility, and high strength underscores the critical roles these mechanical properties play in ensuring that metal implants can function effectively within the dynamic environment of the human body.