The polyethylene insert is a critical but invisible component in knee replacement surgery that acts as a shock absorber between metal components, controls stability and constraint based on its shape and geometry, and its wear can be detected through X-ray examination showing narrowing or unevenness, indicating the need for replacement.
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The Invisible Part of Your Knee Replacement That Does the Most WorkAdded:
What is this invisible [music] space between two metals? This is a polyethylene insert. Not only acts as a shock absorber, but it controls the stability and constraint [music] depending on the shape and geometry. You have to look at the x-ray to tell whether the implant is wearing out if it becomes an error or uneven, [music] you can tell that the implant is wearing and it might be time to change it. So the next time you look at the x-ray pay attention to it.
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