APEX Knee Navigating Pearls and Pitfalls-Cartilage Restoration 101 (Debridement, Microfracture, OATS)

Video Transcription

Video Summary

A panel discusses a 17-year-old recruited volleyball player who developed sudden left knee pain after landing from a jump. Five weeks later she is on crutches, has near full ROM but pain with extension, a small effusion, and MRI findings consistent with a chronic osteochondritis dissecans (OCD)-type osteochondral defect of the femoral condyle with a loose intra-articular cartilage fragment (“joint mouse”).<br /><br />Key management options debated include: arthroscopy to remove the loose body; simple debridement as a “staging scope” to relieve symptoms quickly; attempted fixation if a viable osteochondral fragment with bone is found (using sutures/anchors/bioabsorbable pins); marrow stimulation (microfracture/microdrilling/nanofracture) for small, well-contained full-thickness lesions; and cartilage restoration back-up plans such as autograft OATS or fresh osteochondral allograft (availability and insurance vary).<br /><br />They emphasize MRI often underestimates lesion size, the importance of lesion size/containment due to edge loading, and sport timing: debridement alone may allow faster return, while marrow stimulation typically prolongs rehab (often non-weight-bearing ~6 weeks), though some advocate earlier weight bearing for small contained defects. In the presented case, the surgeon performed arthroscopy, removed the poor-quality loose cartilage, created vertical walls, and performed a “formal” microfracture; the fragment was sent for possible future chondrocyte culture as a contingency if symptoms persist.

Asset Caption

Moderator: Sherwin S.W. Ho, M.D.
Panel: Ian Hutchinson, M.D., Nikolaos K. Paschos, M.D., Ph.D., Nicholas A. Sgaglione, M.D., Jason L. Koh, M.D.

Keywords

adolescent volleyball knee injury

osteochondritis dissecans femoral condyle

osteochondral defect with loose body joint mouse

knee arthroscopy loose body removal

microfracture marrow stimulation cartilage repair

osteochondral fragment fixation bioabsorbable pins

cartilage restoration OATS osteochondral allograft