Table 2 Magnetic resonance observation of cartilage repair tissue assessment: morphological magnetic resonance imaging grading and point scale of both knees 12 months postoperative
Variables | Left knee | Right knee |
|---|---|---|
1. Degree of defect repair and filling of the defect | 20 | 15 |
 Complete (20) |  |  |
 Hypertrophy (15) |  |  |
 Incomplete |  |  |
 >50 % of the adjacent cartilage (10) |  |  |
 <50 % of the adjacent cartilage (5) |  |  |
 Subchondral bone exposed |  |  |
2. Integration of the border zone | 10 | 15 |
 Complete (15) |  |  |
 Incomplete |  |  |
 Demarcating border visible (slit like; 10) |  |  |
 Defect visible <50 % of the length (5) |  |  |
 Defect visible >50 % of the length (0) |  |  |
3. Surface of the repair tissue | 5 | 5 |
 Surface intact (10) |  |  |
 Surface damaged <50 % of depth (5) |  |  |
 Surface damaged >50 % of depth (0) |  |  |
4. Structure of the repair tissue | 0 | 0 |
 Homogeneous (5) |  |  |
 Inhomogeneous (0) |  |  |
5. Signal intensity of the repair tissue | 30 | 15 |
 Normal (identical to adjacent cartilage; 30) |  |  |
 Nearly normal (slight areas of signal alteration; 15) |  |  |
 Abnormal (large areas of signal alteration; 0) |  |  |
6. Subchondral lamina | 0 | 0 |
 Intact (5) |  |  |
 Not intact (0) |  |  |
7. Subchondral bone | 0 | 5 |
 Intact (5) |  |  |
 Not intact (0) |  |  |
8. Adhesions | 5 | 5 |
 No (5) |  |  |
 Yes (0) |  |  |
9. Effusion | 5 | 5 |
 No (5) |  |  |
 Yes (0) |  |  |
TOTAL | 75 | 65 |