1. In Vivo Oxidation in Remelted Highly Cross-Linked Retrievals by B.H. Currier, D.W. Van Citters, J.H. Currier, and J.P. Collier J Bone Joint Surg Am Volume 92(14):2409-2418 October 20, 2010 ©2010 by The Journal of Bone and Joint Surgery, Inc.

2. This diagram illustrates the sample location for Fourier transform infrared spectroscopy analyses of retrieved acetabular liners and tibial inserts. B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

3. A standard ethylene-oxide-sterilized ultra-high molecular weight polyethylene liner (in vivo for 8.2 years and analyzed at 3.2 months after retrieval) was subjected to hexane extraction with the same extraction parameters used for the remelted highly cross-... B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

4. Ketone peak height oxidation profiles versus depth are shown for the never-implanted Durasul, Longevity, and Marathon control liners after eight to nine years of shelf-aging in air. B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

5. Oxidation of retrieved remelted highly cross-linked liners and inserts, plotted as a function of total time since implantation (time in vivo plus post-retrieval shelf time before Fourier transform infrared spectroscopy analysis), compared with oxidation of... B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

6. Figs. 5-A and 5-B The oxidation profiles of 22% of the remelted highly cross-linked ultra-high molecular weight polyethylene retrievals in this study showed a subsurface peak in oxidation. B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

7. Three remelted highly cross-linked tibial insert retrievals that showed a subsurface peak in oxidation had been in vivo for 2.0, 3.7, and 4.0 years. B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

8. The maximum oxidation values obtained with the ketone peak height ratio method before and after hexane extraction correlated (R2 = 0.98, p < 0.001) and showed that hexane extraction led to a small decrease in the maximum ketone oxidation level (intercept =... B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.

9. The maximum ketone peak height ratio (before hexane extraction) correlated closely (R2 = 0.93, p < 0.001) with the ASTM standard oxidation index25 after hexane extraction. B.H. Currier et al. J Bone Joint Surg Am 2010;92:2409-2418 ©2010 by The Journal of Bone and Joint Surgery, Inc.