TABLE IV.
Types and Reasons for Reoperations According to Postoperative Timing
| Type/Timing of Reoperations |
No. (%) of Reoperations |
Complication Causing Reoperation | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Type 1 |
Type 2 |
Type 3 | Type 4 |
Type 5 | Stiff Knee |
Polyethylene | Patellar | Other | |||
| Implant | Fracture | ||||||||||
| Overall reoperations | |||||||||||
| <5 yr | 183 (58.7) | 27 | 22 | 14 | 10 | 62 | 5 | 14 | 8 | 13 | 8 |
| 5-10 yr | 53 (17.0) | 0 | 11 | 3 | 1 | 15 | 3 | 0 | 6 | 11 | 3 |
| >10 yr | 76 (24.4) | 2 | 8 | 1 | 5 | 35 | 0 | 2 | 5 | 12 | 6 |
| Total | 312 (100) | 29 | 41 | 18 | 16 | 112 | 8 | 16 | 19 | 36 | 17 |
| Minor reoperations | |||||||||||
| <5 yr | 128 (59.8) | 27 | 2 | 0 | 5 | 48 | 4 | 14 | 8 | 13 | 7 |
| 5-10 yr | 32 (15.0) | 0 | 1 | 0 | 0 | 11 | 1 | 0 | 6 | 11 | 2 |
| >10 yr | 54 (25.2) | 2 | 1 | 0 | 2 | 25 | 0 | 2 | 5 | 12 | 5 |
| Total | 214 (100) | 29 | 4 | 0 | 7 | 84 | 5 | 16 | 19 | 36 | 14 |
| Major reoperations | |||||||||||
| <5 yr | 55 (56.1) | 0 | 20 | 14 | 5 | 14 | 1 | 0 | 0 | 0 | 1 |
| 5-10 yr | 21 (21.4) | 0 | 10 | 3 | 1 | 4 | 2 | 0 | 0 | 0 | 1 |
| >10 yr | 22 (22.4) | 0 | 7 | 1 | 3 | 10 | 0 | 0 | 0 | 0 | 1 |
| Total | 98 (100) | 0 | 37 | 18 | 9 | 28 | 3 | 0 | 0 | 0 | 3 |