Failure mechanism | Total [n (%)] n = 402 | Time to revisiona (yr) | Primary revision [n (%)] | Re-revision | ||||
---|---|---|---|---|---|---|---|---|
Early n = 76 | Time to revisiona (yr) | Late n = 207 | Time to revisiona (yr) | [n (%)] | Time to revisiona (yr) | |||
Infection | 146 (36.3) | 4.2 ± 4.4 (0.06 - 20.1) | 39 (51.3) | 1.0 ± 0.6 (0.06 - 2.0) | 57 (27.5) | 7.3 ± 4.8 (2.1 - 20.1) | 50 (44.2) | 3.3 ± 3.3 (0.1 - 13.0) |
Aseptic loosening | 87 (21.6) | 6.5 ± 5.4 (0.4 - 21.6) | 7 (9.2) | 1.6 ± 0.2 (1.4 - 2.0) | 49 (23.7) | 8.6 ± 5.6 (2.1 - 21.6) | 31 (27.7) | 4.3 ± 3.8 (0.4 - 17.1) |
Periprosthetic fracture | 55 (13.7) | 8.5 ± 5.4 (0.04 - 24.2) | 4 (5.3) | 0.5 ± 0.6 (0.04 - 1.4) | 39 (18.8) | 9.5 ± 5.1 (2.6 - 24.2) | 6 (5.4) | 7.9 ± 4.9 (3.9 - 17.6) |
Instability | 27 (6.7) | 5.4 ± 4.1 (0.08 - 15.2) | 5 (6.6) | 1.3 ± 0.2 (1.1 - 1.6) | 16 (7.7) | 6.9 ± 4.1 (2.2 - 15.2) | 6 (5.4) | 4.9 ± 3.3 (0.1 - 9.2) |
Pain | 24 (6.0) | 3.6 ± 3.0 (1.1 - 11.1) | 6 (7.9) | 1.4 ± 0.2 (1.1 - 1.6) | 13 (6.3) | 5.6 ± 3.1 (2.0 - 11.1) | 5 (4.5) | 1.9 ± 0.4 (1.4 - 2.2) |
Polyethylene wear | 21 (5.2) | 10.5 ± 5.8 (1.6 - 19.5) | 0 (0) | 17 (8.2) | 11.9 ± 5.3 (3.7 - 19.5) | 4 (3.6) | 4.8 ± 4.2 (1.6 - 10.8) | |
Restriction of motion, arthrofibrosis | 18 (4.5) | 2.6 ± 2.3 (0.04 - 9.6) | 7 (9.2) | 0.9 ± 0.6 (0.04 - 0.9) | 8 (3.9) | 4.1 ± 2.6 (2.1 - 9.6) | 3 (2.7) | 2.6 ± 1.9 (0.6 - 4.3) |
Extensor mechanism insufficiency | 15 (3.7) | 2.9 ± 3.6 (0.03 - 11.8) | 7 (9.2) | 0.7 ± 0.8 (0.03 - 1.8) | 6 (2.9) | 5.6 ± 4.4 (2.0 - 11.8) | 2 (1.8) | 2.9 ± 1.9 (1.6 - 4.2) |
Mechanically defect | 8 (2.0) | 5.5 ± 2.8 (1.4 - 9.8) | 1 (1.3) | 1.4 | 2 (1.0) | 8.5 ± 1.8 (7.2 - 9.8) | 5 (4.5) | 5.1 ± 2.1 (2.6 - 7.9) |
Allergy | 1 (0.2) | 1.2 | 0 (0) | 0 (0) | 1 (0.9) | 1.2 | ||
Total | 5.5 ± 5.0 (0.03 - 24.2) | 1.0 ± 0.6 (0.03 - 2.0) | 8.1 ± 5.1 (2.0 - 24.2) | 3.9 ± 3.5 (0.08 - 17.6) |