Table 7.
Literature comparison of UKAs performed in patients with spontaneous and secondary osteonecrosis of the knee
| Study | Number of patients | Male/female | Age (years)* | BMI* | Followup (years)* | Secondary ON | Site of disease | Sizing of lesion | Preoperative MRI | Survival analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| Marmor [24] | 32 (2 bilateral) | 10/22 | 68 (range, 34–84) | NA | 5.5 (range, 2–16) | 2 steroid-induced | 31 MFC; | NA | NA | NA |
| 1 MTP; | ||||||||||
| 2 LFC; | ||||||||||
| Langdown et al. [17] | 27 UKA ON (2 bilateral) versus 26 UKA OA (2 bilateral) | 5/22 | 73 (range, 43–88) | NA | 5.2 (range, 1–13) | NA | 26 MFC; | NA | NA | NA |
| 3 MTP | ||||||||||
| Radke et al. [33] | 23 UKA ON versus 16 TKA ON | 3/20 | 70 (range, 54–80) | Weight, 71 kg (range, 56–104) | 3.3 (6 patients); | 1 postradiation therapy; | All medial compartment | Radiographic | NA | NA |
| 4.7 (10 patients); | 3 corticosteroid therapy | |||||||||
| 10.4 (10 patients) | ||||||||||
| Parratte et al. [30] | 30 patients (1 bilateral) | 10/20 | 71 (range, 51–88) | 27 (range, 18–35) | 7 (range, 3–16) | 10 (33%) (7 steroid-induced; 3 barotraumatic) | 29 medial compartment; | NA | 26 patients (86%) | 96.7% at 12 years with revision for any reason or radiographic loosening as end point |
| 2 lateral compartment | ||||||||||
| Servien et al. [34] | 33 UKA ON versus 35 UKA OA | 10/23 | 74 (range, 42–89) | 25 ± 4 | 5.1 (range, 2–11.5) | NA | 33 MFC | NA | Not systematically provided | 93% at 10 years with removal and/or conversion to TKA as end point |
* Values are expressed as mean or mean ± SD, ranges in parentheses; †patients were divided into three groups for univariate ANOVA; UKA = unicompartmental knee arthroplasty; ON = osteonecrosis; UKA ON = UKA performed for osteonecrosis; UKA OA = UKA performed for osteoarthritis; TKA ON = TKA performed for osteonecrosis; MFC = medial femoral condyle; MTP = medial tibial plateau; LFC = lateral femoral condyle; NA = not available.