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Results of the histological grading scale.
| Grade | |||||||
| Group | Time (weeks) | Cell morphology | Matrix staining | Surface regularity | Thickness of cartilage | Integration | Total |
| Gel-cell complex | 4 | 2.0 | 1.0 | 0.7 | 1 | 0.0 | 4.7 |
| 8 | 2.0 | 1.0 | 0.0 | 1 | 0.0 | 4.0 | |
| 12 | 2.0 | 1.0 | 0.0 | 1 | 0.0 | 4.0 | |
| Gel only | 4 | 3.5 | 2.5 | 1.5 | 2 | 1.5 | 11.0 |
| 8 | 3.0 | 3.0 | 2.0 | 2 | 2.0 | 12.0 | |
| 12 | 4.0 | 3.0 | 2.5 | 2 | 2.0 | 13.5 | |
