Comparison of the Wear Rates of Twenty-eight and Thirty- two-Millimeter Femoral Heads on Cross-Linked Polyethylene Acetabular Cups in a Wear Simulator.

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Comparison of the Wear Rates of Twenty-eight and Thirty- two-Millimeter Femoral Heads on Cross-Linked Polyethylene Acetabular Cups in a Wear Simulator by Juan C. Hermida, Arnie Bergula, Peter Chen, Clifford W. Colwell, and Darryl D. D'Lima J Bone Joint Surg Am Volume 85(12): December 1, 2003 ©2003 by The Journal of Bone and Joint Surgery, Inc.

Graph of the wear rates over time showing a near linear increase in wear with number of cycles for all groups of liners. Juan C. Hermida et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

Magnified (×20) view of the dome of the articular surfaces of tested liners. Juan C. Hermida et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

A nominally cross-linked 32-mm liner dome (32-0) after five million cycles of testing with obliteration of machining marks. Juan C. Hermida et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

An elevated cross-linked 32-mm liner dome (32-X) before testing. Juan C. Hermida et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.

An elevated cross-linked 32-mm liner dome (32-X) after five million cycles of testing, still showing machining marks. Juan C. Hermida et al. J Bone Joint Surg Am 2003;85: ©2003 by The Journal of Bone and Joint Surgery, Inc.