Table 1.
Demographic data and implant characteristics in the initial study cohort stratified per surgery type (i.e. primary TKA or revision TKA).
| Primary Group | Revision Group | p-Value | |
|---|---|---|---|
| N° of knees | 19 | 26 | |
| Gender (n, %) | |||
| Male | 5 (26%) | 3 (12%) | |
| Female | 14 (74%) | 23 (88%) | |
| Side (n, %) | |||
| Left | 6 (32%) | 9 (35%) | |
| Right | 13 (68%) | 17 (65%) | |
| Age at surgery [yrs] mean ± SD/(range)( ( median/(IQR)( (distribution |
69 ± 10/(43 - 82) 70/(60 - 77) N |
72 ± 7/(56 - 85) 73/(67 -77) N |
p=0.184 (a) |
| Indication for CCK implant | -ligament loosening -severe varus/valgus deformity -severe osteoarthritis |
-ligament loosening -severe varus/valgus deformity -severe bone loss/bad bone quality |
|
| Pre-op Diagnosis (n, %) |
Primary OA (11; 58%) Post-osteotomy OA (3; 16%) Post-traumatic OA (2; 11%) Osteonecrosis (1; 5%) Rheumatoid Arthritis (2; 11%) |
Aseptic TKA loosening (14; 54%) Aseptic UKA loosening (7; 27%) Infected TKA (5; 19%) |
|
| Stem extensions | |||
| N° of knees with femoral stem (n, %) | 7 (37%) | 18 (69%) | |
| Femoral stem diameter [mm] median/ most used/(range) |
15 /15/(13 - 20) |
14/14/(11 - 18) |
|
| Femoral stem length [mm] median/ most used/(range) |
75/75/(30 - 75) |
75/75/(30 - 155) |
|
| N° of knee with tibial stem (n, %) | 19 (100%) | 26 (100%) | |
| Tibial stem diameter [mm] median/most used/(range) |
12/12/(11 - 16) |
12.5/12 and 14/(10 - 15) |
|
| Tibial stem length [mm] median/most used/(range) |
75/75/(30 - 100) |
75/75/(75 - 155) |
|
| Hospital stay [days] mean ± SD/(range) median/(IQR) distribution |
14 ± 6/(9 - 31) 13/(10 - 18) N |
16 ± 8/(9 - 39) 15/(11 – 18) N |
p=0.467 (b) |
| Implantation time [yrs] mean ± SD/(range) median/(IQR) distribution |
10.6 ± 2.2/(2.4 - 12.5) 10.8/(10.5 - 11.6) N |
11.3 ± 1.1/(7.6 - 12.8) 11.3/(10.9 – 11.9) N |
p=0.135 (b) |
| |||