SME
Biomaterials · Problem type
Metal, polymer or ceramic?
Use this for “Which class of material is a hip stem, a suture and a bone-like coating, and why is each chosen?”
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Which class of material is each implant made of?
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Metals bear load, polymers bend or dissolve, ceramics wear little but crack.
Assumptions
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Metals are strong and tough; polymers are soft, slippery or dissolve; ceramics are hard and inert but brittle.
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A coating counts as its own material: the stem under it is still metal.
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