Table 2 Modified o’driscoll scoring for cartilage repairing evaluation.
Dimensions | Points |
|---|---|
% Hyaline in repaired tissue | ≤ 20% (0), 21–40% (2), 41–60% (4), 61–80% (6), > 80% (8) |
Structural characteristics | |
Surface irregularity | Severe degeneration (0), fissures (1), smooth and intact (2) |
Structural integrity | Severe lack of integration (0), slight disruption including cysts (1), normal (2) |
Thickness | ≤ 50% (0), 51–99% (1), 100% (2) of normal adjacent cartilage |
Integration to surrounding cartilage | Not integration (0), integrated at 1 end/partially at both ends (1), integrated at both ends of graft (2) |
Cellular degeneration in repaired tissue (degreed of hypocellularity) | > 25% chondrocyte clusters (0); ≤25% clusters (1); no clusters (2) |
Degeneration in adjacent tissue | Severe hypocellularity, slight staining (0); mild hypocellularity, slight staining (1); normal cellularity, mild clusters, moderate staining (2); normal cellularity, no clusters, normal staining (3) |
Reconstitution of subchondral bone | ≤ 50% (0), 51–100% (1), complete reconstitution (2) |
Integration of repaired cartilage to de novo subchondral bone | ≤ 50% (0), 51–100% (1), complete and uninterrupted (2) |
Safranin O staining | ≤ 40% (0), 41–80% (1), > 80% (2) |
