Table 1 Factors Table
Independent Variables | Autopsy | Revision |
|---|---|---|
1. Retrieved Inlays [N] | 24 | 25 |
2. Implantation time [months] | 104.9 (0.8 to 199.0) | 92.0 (4.7 to 193.6) |
Prosthesis Related Factors | ||
3. Prosthesis Type [PCA/PCAModular/Duracon] | 5/14/5 | 10/7/8 |
4. Resin Type [GUR4150/GUR1050] | 21/3 | 21/4 |
5. Sterilization with N2 Protection-Gas | 0 | 4 |
6. **Patella Replacement [Metal Back/Cemented/Unreplaced] | 4/5/12 (N = 21) | 10/4/10 (N = 24) |
7. Inlay Thickness According to Manufacturer [mm] | 10.4 (7.0 to 21.0) | 10.5 (7.0 to 21.0) |
Patient Related Factors | ||
8. **Age at implantation [months] | 73.6 (53.7 to 87.1) | 66.0(48.4 to 80.3) |
9. **Walking capacity [Level 1, 2 and 3] | 7/4/6 (N = 17) | 3/8/11**(N = 22) |
10. Body Mass Index | 23.4 (16.3 to 29.4) | 26.6 (16.7 to 39.2) |
11. Preoperative Femoro-tibial angle [°]μ | 0.9 (18 to -28) | 1.2 (28 to -18) |
12. Knee Pain score at last F-up | 0.2 (N = 16) | 1.5 (N = 17) |
13. Patient Satisfaction score at last F-up | 2.6 (N = 16) | 1.8 (N = 17) |
Surgery Related Factors | ||
14. Postoperative Femoro-tibial angle [°]μ | -5.7 (1 to -12) | -3.2 (5 to -12) |
15. Tibia component angle frontal plane [°]μ | 2.4 (5 to -2) | 2.3 (6 to -6) |
16. Tibia component angle sagittal plane [°]μ | 1.0 (5 to -9) | -1.9 (2 to -11) |
17. Femur component angle frontal plane [°]μ | -8.1 (-4 to -13) | -5.8 (12 to -10) |
18. Femur component angle sagittal plane [°]μ | -4.9 (-5 to 2) | -2.5 (-9 to 7) |
19. Index of unacceptable malpositioning | 1.1 | 1.2 |
20. Patellae with lateralization on axial view | 3 | 10 |
21. Instability Index | 1.0 | 1.8 |