Does the addition of vitamin E to conventional UHMWPE improve the wear performance of hip acetabular cups? Micro-Raman characterization of differently processed polyethylene acetabular cups worn on a hip joint simulator.

The STD cup underwent an almost significant (P=0.0730, reported in Figure 5 ) increase in the α o content, from 0.59 (SD: 0.03) to 0.62 (SD: 0.05), Figure 7C ), as also revealed by the strengthening of the 1416 cm -1 band ( Figure 7A ).

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The α o orthorhombic content was shown to be not significantly affected by wear (only STD acetabular cups were quite close to significance).

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