Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 3 MRI evaluation of repair tissue 1–2 years and 10 years after ACI implantation
Variables | First follow-up | Last follow-up |
|---|---|---|
1. Degree of defect repair and filling of the defect | ||
Complete | 2/10 (20 %) | 2/10 (20 %) |
Hypertrophy | 4/10 (40 %) | 4/10 (40 %) |
Incomplete | ||
>50 % of the adjacent cartilage | 3/10 (30 %) | 0/10 (0 %) |
<50 % of the adjacent cartilage | 0/10 (0 %) | 1/10 (10 %) |
Subchondral bone exposed | 1/10 (10 %) | 3/10 (30 %) |
2. Integration to border zone | ||
Complete | 7/10 (70 %) | 4/10 (40 %) |
Incomplete | ||
Demarcating border visible (split-like) | 0/10 (0 %) | 1/10 (10 %) |
Defect visible | ||
<50 % of the length of the repair tissue | 1/10 (10 %) | 2/10 (20 %) |
>50 % of the length of the repair tissue | 2/10 (20 %) | 3/10 (30 %) |
3. Surface of the repair tissue | ||
Surface intact | 5/10 (50 %) | 5/10 (50 %) |
Surface damaged | ||
<50 % of repair tissue depth | 2/10 (20 %) | 2/10 (20 %) |
>50 % of repair tissue depth or total degeneration | 3/10 (30 %) | 3/10 (30 %) |
4. Structure of the repair tissue | ||
Homogeneous | 3/10 (30 %) | 1/10 (10 %) |
Inhomogeneous or cleft formation | 7/10 (70 %) | 9/10 (90 %) |
5. Signal intensity of the repair tissue | ||
Normal (identical to adjacent cartilage) | 3/10 (30 %) | 2/10 (20 %) |
Nearly normal | 5/10 (50 %) | 5/10 (50 %) |
Abnormal | 2/10 (20 %) | 3/10 (30 %) |
6. Subchondral lamina | ||
Intact | 2/10 20 %) | 1/10 (10 %) |
Not intact | 8/10 (80 %) | 9/10 (90 %) |
7. Subchondral bone | ||
Intact | 4/10 (40 %) | 1/10 (10 %) |
Not intact | 6/10 (60 %) | 9/10 (90 %) |
8. Adhesions | ||
No | 8/10 (80 %) | 2/10 (20 %) |
Yes | 2/10 (20 %) | 8/10 (80 %) |
9. Effusions | ||
No | 8/10 (80 %) | 6/10 (60 %) |
Yes | 2/10 (20 %) | 4/10 (40 %) |