Researchers in Canadahave found that a way to make medical implants last longer makes them more biocompatible than at first thought.Stainless steel is often used in, for example, joint replacements, because it is cheap and corrosion resistant. Nevertheless its implants are not as long-lived in the body as those made of other materials, such as titanium or titanium alloys, so researchers have looked at modifying implant surfaces to make them more biocompatible.
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