Table 4.
Reasons for revision TKAs and THAs
| Reasons for revision procedure (ICD-9 code) | Number (%) |
|---|---|
| TKA | |
| Infection (996.66) | 75,513 (25) |
| Mechanical loosening (996.41) | 55,807 (19) |
| Other mechanical problems (996.47) | 31,017 (10) |
| Implant failure (996.43) | 28,817 (10) |
| Dislocation/instability (996.42) | 22,068 (7) |
| Other mechanical complications (996.49) | 14,605 (5) |
| Bearing surface wear (996.46) | 12,567 (4) |
| Periprosthetic osteolysis (996.45) | 8663 (3) |
| Periprosthetic fracture (996.44) | 4742 (2) |
| THA | |
| Dislocation/instability (996.42) | 52,236 (22) |
| Mechanical loosening (996.41) | 47,933 (20) |
| Infection (996.66) | 36,265 (15) |
| Implant failure (996.43) | 23,339 (10) |
| Other mechanical problems (996.47) | 19,653 (8) |
| Periprosthetic osteolysis (996.45) | 16,819 (7) |
| Periprosthetic fracture (996.44) | 15,045 (6) |
| Bearing surface wear (996.46) | 13,150 (6) |
| Other mechanical complications (996.49) | 12,299 (5) |