Tissue-engineered collagen meniscus implants: 5- to 6-year feasibility study results

Area of Science:

• Orthopedic surgery
• Biomaterials science
• Regenerative medicine

Background:

• Irreparable medial meniscus damage often leads to poor clinical outcomes.
• Tissue-engineered meniscus implants offer a potential solution for meniscus reconstruction.

Purpose of the Study:

• To evaluate the long-term feasibility and clinical outcomes of collagen meniscus implants for medial meniscus reconstruction.
• To assess if improvements seen at 2-year follow-up were maintained over 5-6 years.

Main Methods:

• A prospective longitudinal study involving 8 patients who received arthroscopic collagen meniscus implants.
• Clinical, radiographic, MRI, and arthroscopic assessments were performed at an average of 5.8 years post-implantation.

Main Results:

• Significant improvements in Lysholm scores (75 to 88) and Tegner activity scores (3 to 6) were observed.
• Patient self-assessment and pain scores improved significantly.
• Imaging showed no further chondral degeneration, and arthroscopy revealed 69% defect filling with fibrocartilage.

Conclusions:

• Collagen meniscus implants can regenerate meniscus-like tissue that maintains structure and function for over 5 years.
• The study affirmed that patients showed sustained clinical improvement compared to preoperative status and 2-year follow-up.