Table 4.
Demographic and implant data for the CCK and PS tibial inserts
| Implant design | Number of explants | Patient age at surgery (years)* | Implantation time (months)* | Sex (male/female) | Side (left/right) | Primary/revision cases | Component thickness (mm)* | Shelf time before implantation (months)*,† | Cemented femoral and/or tibial component | Material of femoral component |
|---|---|---|---|---|---|---|---|---|---|---|
| CCK Insall/Burstein® II | 23 | 68.6 ± 13.8 (37–86) |
19.7 ± 17.9 (0.8–59.7) |
8/15 | 14/9 | 3/19 | 16.8 ± 4.8 (10–25) |
15.1 ± 10.8 (6.2–46.2) |
All yes | All Co-Cr-Mo |
| PS Insall/Burstein® II | 15 | 66.9 ± 10.1 (45–76) |
16.1 ± 12.3 (3.4–39.8) |
4/11 | 11/4 | 13/2 | 14.8 ± 6.3 (8–25) |
5.1 ± 5.9 (1.6–15.4) |
All yes | All Co-Cr-Mo |
| p value‡ | 0.194 | 0.729 | 0.581 | 0.599 | 0.429 | < 0.001 | 0.728 | 0.074 | 1 | 1 |
* Values are expressed as mean ± SD, with the range in parentheses; †known for 12 CCK and five PS components; ‡comparing the CCK and PS groups; the two-tailed t-test was used for the continuous variables and the chi-square test for the frequency values; CCK = constrained condylar knee; PS = posterior-stabilized.