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Effect of Sterilization Method and Other Modifications on the Wear Resistance of Acetabular Cups Made of Ultra- High Molecular Weight Polyethylene by Harry.

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Presentation on theme: "Effect of Sterilization Method and Other Modifications on the Wear Resistance of Acetabular Cups Made of Ultra- High Molecular Weight Polyethylene by Harry."— Presentation transcript:

1 Effect of Sterilization Method and Other Modifications on the Wear Resistance of Acetabular Cups Made of Ultra- High Molecular Weight Polyethylene by Harry McKellop, Fu-wen Shen, Bin Lu, Patricia Campbell, and Ronald Salovey J Bone Joint Surg Am Volume 82(12):1708-1708 December 1, 2000 ©2000 by The Journal of Bone and Joint Surgery, Inc.

2 Flowchart showing the production of the ultra-high molecular weight polyethylene (UHMWPE) as modified by the orthopaedic implant manufacturers. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

3 Graph showing the oxidation levels from the inner bearing surface to the center of the cup wall (left to right) obtained from an ultra-high molecular weight polyethylene cup after seventeen years of shelf-aging and from the nonworn zone of an ultra-high mol... Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

4 Graph showing the oxidation levels from the inner surface to the center of the cup wall (left to right) in the nonworn zones of the cups tested without artificial aging. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

5 Graph showing the volumetric wear of the two cups of each material tested without artificial aging. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

6 Graph showing the mean wear rates and the standard deviations for the six different types of polyethylene and for the two cycle intervals without artificial aging. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

7 Graph showing the oxidation levels from the inner surface to the center of the cup wall (left to right) in the nonworn zones of the cups tested after fourteen days of artificial aging at 80 degrees Celsius. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

8 Graph showing the volumetric wear of the two cups of each material tested after fourteen days of artificial aging at 80 degrees Celsius. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

9 Graph showing the mean wear rates and the standard deviations for the six different types of polyethylene and for the two cycle intervals after fourteen days of artificial aging at 80 degrees Celsius. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

10 Graph showing the oxidation levels from the inner surface to the center of the cup wall (left to right) in the nonworn zones of the cups tested after thirty days of artificial aging at 80 degrees Celsius. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

11 Graph showing the volumetric wear of the two cups of each material tested after thirty days of artificial aging at 80 degrees Celsius. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

12 Graph showing the mean wear rates and the standard deviations for the six different types of polyethylene and for the three cycle intervals after thirty days of artificial aging at 80 degrees Celsius. Harry McKellop et al. J Bone Joint Surg Am 2000;82:1708 ©2000 by The Journal of Bone and Joint Surgery, Inc.

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