Table 2 Patient demographics by implant type. SD, standard deviation; OA, osteoarthritis; PS, posterior stabilized; CR, cruciate retaining; the percentages totalled > 100% because some knees had more than one reason for revision recorded
Design, type | Gender (F:M) | Age at revision, mean and SD (yrs) | Time to revision, mean and SD (yrs) | Reason(s) for revision |
|---|---|---|---|---|
Persona®, total | 5:3 | 67.3 (± 6.9) | 2.2 (± 0.94) | Instability (n = 8, 100%); patellofemoral problem (n = 3, 37.5%); malalignment (n = 1, 12.5%); stiffness (n = 1, 12.5%) |
Persona®, CR | 3:1 | 68.9 (± 2.4) | 2.5 (± 1.1) | Instability (n = 4, 100%); patellofemoral problem (n = 1, 25%); malalignment (n = 1, 25%); stiffness (n = 1, 25%) |
Persona®, PS | 2:2 | 65.7 (± 10) | 1.9 (0.7) | Instability (n = 4, 100%); patellofemoral problem (n = 2, 50%) |
NexGen®, total | 14:1 | 69.4 (± 10.1) | 7.9 (± 5.5) | Instability (n = 9, 60%); stiffness (n = 3, 20%); malalignment (n = 2, 13.3%); others (periprosthetic fracture, progression OA, n = 2, 13.3%); patellofemoral problem (n = 1, 6.6%) |
NexGen®, CR | 9:1 | 71.9 (± 9.7) | 7.4 (± 4.4) | Instability (n = 6, 60%); stiffness (n = 2, 20%); malalignment (n = 1, 10%); others (periprosthetic fracture n = 1, 10%) |
NexGen®, PS | 5:0 | 64.4 (± 9.8) | 8.9 (± 7.7) | Instability (n = 3, 60%); stiffness (n = 1, 20%); malalignment (n = 1, 20%); others (progression OA n = 1, 20%); patellofemoral problem (n = 1, 20%) |