From: Quantification of structural changes of UHMWPE components in total joint replacements
Sample | Location of sample | Years in vivo | Oxidation indices, various sites | VI range | FRC (mol/g) | ||
---|---|---|---|---|---|---|---|
 |  |  | OI inner | OI middle | OI outer |  |  |
L1 | Unworn | 11 | 1.79 | 0.08 | 0.85 | 0.010–0.016 | 1.4e-10 |
 | Worn | 2.37 | 0.09 | 0.98 | |||
L2 | Unworn | 20 | 0.43 | 0.19 | 0.28 | 0.014–0.020 | 5.0e-10 |
 | Worn | 1.52 | 0.22 | 0.89 | |||
L3 | Unworn | 16 | 0.64 | 0.06 | 0.34 | 0.008–0.012 | 1.4e-10 |
 | Worn | 1.55 | 0.06 | 0.49 | |||
L4 | Unworn | 10 | 6.62 | 1.35 | 2.50 | 0.012–0.018 | 5.2e-10 |
 | Worn | 2.14 | 1.52 | 2.34 |