1. Age > 60 years |
2. Poor axial alignment of the lower limb (varus/valgus > 3ο or 5ο) |
3. Immature skeleton |
4. Knee OA of grade ≥ 3 according to the Kellgren–Lawrence or Ahlbäck classification |
5. Diffuse degeneration of the articular cartilage |
6. Knee instability |
7. BMI > 35 |
8. Inflammatory joint disease |
9. Disease of the synovial membrane |
10. Recent septic arthritis or untreated septic arthritis |
11. Metabolic disorders or the presence of crystals |
12. Previous osteotomy for mechanical axis correction |
13. ACL insufficiency |