|
Nature of predominant tissue
|
|
| Cellular morphology |
|
| Hyaline articular cartilage |
4 |
| Incompletely differentiated mesenchyme |
2 |
| Fibrous tissue or bone |
0 |
| Safranin O staining of matrix |
|
| Normal or nearly normal |
3 |
| Moderate |
2 |
| Slight |
1 |
| None |
0 |
|
Structural characteristics
|
|
| Surface regularity |
|
| Smooth and intact |
3 |
| Superficial horizontal lamination |
2 |
| Fissure—25 to 100→ of the thickness |
1 |
| Severe disruption, including fibrillation |
0 |
| Structural integrity |
|
| Normal |
2 |
| Slight disruption, including cysts |
1 |
| Severe disintegration |
0 |
| Thickness |
|
| 100→ of normal adjacent cartilage |
2 |
| 50 to 100→ of normal cartilage |
1 |
| 0 to 50→ of normal cartilage |
0 |
| Bonding to the adjacent cartilage |
|
| Bonded at both ends of graft |
2 |
| Bonded at one end, or partially at both ends |
1 |
| Not bonded |
0 |
|
Freedom from cellular changes of degeneration
|
|
| Hypocellularity |
|
| Normal |
3 |
| Slight |
2 |
| Moderate |
1 |
| Severe |
0 |
| Chondrocyte clustering |
|
| No clusters |
2 |
| <25→ of the cells |
1 |
| 25 to 100→ of the cells |
0 |
|
Freedom from degenerative changes in adjacent cartilage
|
|
| Normal cellularity, no clusters, normal staining |
3 |
| Normal cellularity, mild clusters, moderate staining |
2 |
| Mild or moderate hypocellularity, slight staining |
1 |
| Severe hypocellularity, poor or no staining |
0 |
