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Wright Medical Technology, Inc.
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The shells are constructed of cobalt chrome and are available in 1mm increments to allow for exact sizing of the acetabulum. The bearing surface inside the shell is cross-linked polyethylene. The use of cross-linked polyethylene results in a significant reduction in the amount of particles that are created from wear compared to UHMWPE. There is an UHMWPE support ring inside the shell that is permanently fixed. There is also an UHMWPE locking ring that assembles above the support ring and locks into place once the head is inserted into the shell.
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