MRI evaluation using guided cartilage regeneration membrane for articular cartilage injury repair 730 days (2 years) is the main indicator of this trial. In this experiment, we observe the improvement of Lysholm score, VAS score, ratio change of regenerated cartilage T2 value to normal cartilage T2 value, and ratio of regenerated cartilage △R1 value to normal cartilage △R1 value Indicators such as value changes are secondary evaluation indicators.
Guided cartilage regeneration membrane for repairing the safety and effectiveness of articular cartilage injury