Table 1.
Comparison of the 5 non-coated single-level TDRs included in the present study and the 11 cases from the original study of the first 16 patients32 (± standard error of the mean).
| 5 non-coated single TDRs (included) | Residual 11 TDR cases from the original cohort32 (excluded) | p-value | |
|---|---|---|---|
| Age at implantation (year) | 39.6 ± 2.8 | 42.0 ± 2.1 | 0.61 |
| Gender ♀-♂ | 3 – 2 | 9 – 2 | 0.37 |
| Implantation time (years) | 9.2 ± 1.0 | 7.5 ± 1.3 | 0.25 |
| Mean number of UHMWPE particles/mm2 (≥ 2.05 μm) | 114.0 ± 52.8 | 280.0 ± 100.8 | 0.78 |
| Macrophages (Mirra classification 0 - 1+ - 2+ - 3+) | 0 – 1 – 3 – 1 | 2 – 0 – 4 – 5 | 0.54 |
| Giant-cells (Mirra classification 0 - 1+ - 2+ - 3+) | 2 – 2 – 0 – 1 | 4 – 1 – 4 – 2 | 0.60 |