Table 2.
Incidence of different types of failures in the whole series and according to site of the procedure
| Type | Number as first failure (%) | Number of total failures (number of failures/number of implants [percent of failures]) | Proximal femur (n = 69) (number of failures/number of implants [percent of implants]) | Distal femur (n = 87) (number of failures/number of implants [percent of implants]) | Extraarticular knee (n = 12) (number of failures/number of implants [percent of implants]) | Proximal tibia (n = 32) (number of failures/number of implants [percent of implants]) |
|---|---|---|---|---|---|---|
| 1A | 3 (1.5) | 3/3 (1.5) | 3/3 (4.3) | 0/0 (0) | 0/0 (0) | 0/0 (0) |
| 1B | 3 (1.5) | 5/5 (2.5) | 0 (0) | 2/2 (2.3) | 1/1 (8.3) | 2/2 (6.2) |
| 1C | 6 (3.0) | 6/6 (3.0) | 2/2 (2.9) | 2/2 (2.3) | 1/1 (8.3) | 1/1 (3.1) |
| 2 | 6 (3.0) | 6/6 (3.0) | 3/3 (4.3) | 3/3 (3.4) | 0/0 (0) | 0/0 (0) |
| 3 | 14 (7.0) | 22/16 (11.0) | 2/2 (2.9) | 18/12 (13.8) | 2/2 (16.7) | 0/0 (0) |
| 4 | 17 (8.5) | 19/19 (9.5) | 2/2 (2.9) | 12/12 (13.8) | 2/2 (16.7) | 3/3 (9.3) |
| 5 | 9 (4.5) | 10/10 (5.0) | 3/3 (4.3) | 4/4 (4.6) | 1/1 (8.3) | 2/2 (6.2) |
| Total | 58 (29.0) | 71/58* | 15/15 (26.0) | 41/28 (32.2) | 7/7 (58.3) | 8 /8 (25.0) |
| Total without Type 5 | 49 (24.5) | 61/49† | 12/12 (17.4) | 37/25 (28.7) | 6/6 (50.0) | 6/6 (18.7) |
* Fifty-eight implants with 71 failures (six times recurring the same type of failure in the same patient plus seven times occurring different types of failure in the same patient); †49 implants with 61 failures (six times recurring the same type of failure in the same patient plus six times occurring different types of failure in the same patient).