Related Experiment Video
Updated: May 9, 2025
11:22
Treatment of Osteochondral Defects in the Rabbit's Knee Joint by Implantation of Allogeneic Mesenchymal Stem Cells in Fibrin Clots
Published on: May 21, 2013
17.4K
Medial Meniscal Allograft Transplantation
Jordan D Walters1, Brian C Werner1
1University of Virginia, Charlottesville, Virginia, USA.
Video Journal of Sports Medicine
|May 1, 2025
Summary
Medial meniscal allograft transplantation (MAT) is a surgical option for symptomatic knee defects without arthritis. While offering good midterm results, long-term graft survival rates decrease, necessitating activity modification for optimal outcomes.
Area of Science:
- Orthopedic Surgery
- Sports Medicine
- Regenerative Medicine
Background:
- Medial meniscal allograft transplantation (MAT) addresses symptomatic medial tibiofemoral compartment deficiency.
- It is indicated for patients without advanced arthritic changes.
- Concomitant procedures for cartilage defects, ligamentous laxity, or malalignment are crucial.
Purpose of the Study:
- To review the technique of medial meniscal allograft transplantation (MAT).
- To provide a representative case example of the procedure.
- To discuss indications, methods, and outcomes of MAT.
Main Methods:
- Preoperative assessment includes MRI, arthroscopic images, and specific radiographic measurements (Pollard method) for allograft sizing.
- Surgical technique involves preparing the joint, percutaneous lengthening of the medial collateral ligament (MCL), creating bone tunnels, and securing the allograft with sutures and anchors.
- An 8-mm bone plug size and 8.5 mm diameter/10 mm depth tunnels are utilized for root fixation.
Main Results:
- Meniscal allograft transplantation demonstrates a graft survivorship of approximately 70% at 10 years and 60% at 15 years.
- The procedure is considered a temporizing measure with increasing long-term failure rates.
Conclusions:
- MAT offers good midterm clinical outcomes for specific knee conditions.
- While return to sport is feasible, activity modification is recommended due to potential long-term graft failure.
- MAT serves as a valuable option for preserving joint function in select patient populations.
