Abstract
Surface characteristics of polymers for biomedical applications are critically important. Today the major cause of failure for Ultra High Molecular Weight Polyethylene (UHMWPE) prostheses, is due to the cellular events induced by debris coming from the bearing surfaces. The production of debris is related to the surface crystallinity since the brittleness and the fracture toughness are mostly dependent on the morphology of the material. In this work the Raman microspectrometry was used to evaluate the changes in crystallinity of UHMWPE hip cups subjected to a mechanical friction with ceramic femoral heads. The Partial Least Squares (PLS-1) calibration was used to correlate the Raman spectra to the crystallinity of the polymer measured with DSC calorimetry [1].
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