Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 2 Reasons for revision of the three pairs of cohorts were represented as incidence, percentage, and distribution of failures
Reasons for revision | Apta (1984) | Apta-fix (629) | Hydra (1671) | Hydra-fix (691) | Recta (662) | Recta-fix (152) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N | Incidence (%) | Frequency of failure (%) | N | Incidence (%) | Frequency of failure (%) | N | Incidence (%) | Frequency of failure (%) | N | Incidence (%) | Frequency of failure (%) | N | Incidence (%) | Frequency of failure (%) | N | Incidence (%) | Frequency of failure (%) | |
Pain without loosening | 0 | 0 | 0 | 1 | 0.2 | 7.1 | 3 | 0.2 | 10.7 | 0 | 0 | 0 | 3 | 0.5 | 17.6 | 0 | 0 | 0 |
Periprosthetic fracture | 5 | 0.3 | 18.5 | 5 | 0.8 | 35.7 | 7 | 0.4 | 25 | 3 | 0.4 | 25 | 0 | 0 | 0 | 0 | 0 | 0 |
Dislocation | 8 | 0.4 | 29.6 | 0 | 0 | 0 | 2 | 0.1 | 7.1 | 1 | 0.1 | 8.3 | 3 | 0.5 | 17.6 | 1 | 0.7 | 20 |
Cup aseptic loosening | 3 | 0.2 | 11.1 | 1 | 0.2 | 7.1 | 2 | 0.1 | 7.1 | 0 | 0 | 0 | 3 | 0.5 | 17.6 | 0 | 0 | 0 |
Global aseptic loosening | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.7 | 20 |
Stem aseptic loosening | 1 | 0.1 | 3.7 | 1 | 0.2 | 7.1 | 3 | 0.2 | 10.7 | 1 | 0.1 | 8.3 | 1 | 0.2 | 5.9 | 0 | 0 | 0 |
Infection | 2 | 0.1 | 7.4 | 1 | 0.2 | 7.1 | 2 | 0.1 | 7.1 | 1 | 0.1 | 8.3 | 0 | 0 | 0 | 0 | 0 | 0 |
Unknown | 1 | 0.1 | 3.7 | 1 | 0.2 | 7.1 | 4 | 0.2 | 14.3 | 1 | 0.1 | 8.3 | 1 | 0.2 | 5.9 | 1 | 0.7 | 20 |
Ossifications | 2 | 0.1 | 7.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.2 | 5.9 | 0 | 0 | 0 |
Primary instability | 2 | 0.1 | 7.4 | 1 | 0.2 | 7.1 | 1 | 0.1 | 3.6 | 2 | 0.3 | 16.7 | 3 | 0.5 | 17.6 | 0 | 0 | 0 |
Neck breakage | 2 | 0.1 | 7.4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.2 | 5.9 | 0 | 0 | 0 |
Liner breakage | 1 | 0.1 | 3.7 | 0 | 0 | 0 | 3 | 0.2 | 10.7 | 1 | 0.1 | 8.3 | 0 | 0 | 0 | 1 | 0.7 | 20 |
Stem breakage | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 3.6 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.7 | 20 |
Total | 27 | 1.4 | 100 | 14 | 2.2 | 100 | 28 | 1.7 | 100 | 12 | 1.7 | 100 | 17 | 2.6 | 100 | 5 | 3.3 | 100 |