What is the typical time frame for early fibrocartilage healing after microfracture in a young athlete?

• A. 2–4 weeks for initial fibrocartilage formation; remodeling may continue for 2–3 months.
• B. 4–8 weeks for initial fibrocartilage formation; remodeling may continue for 3–6 months.
• C. 6–12 weeks for initial fibrocartilage formation; remodeling may continue for 6–12 months.
• D. 12–24 weeks for initial fibrocartilage formation; remodeling may continue for 12–24 months.

Answer: (C)

The timing being tested is the typical healing timeline after a microfracture procedure. When marrow elements are exposed, a blood clot forms in the defect and mesenchymal cells migrate in to fill the space. These cells differentiate into chondrocyte-like cells and produce fibrocartilaginous tissue. That initial fibrocartilage formation generally begins around six to twelve weeks after surgery. Remodeling and maturation of this repair tissue continue well beyond that, typically extending for six to twelve months as the tissue reorganizes, strengthens, and more closely adapts to the surrounding joint environment. In a young athlete, the healing potential is good, which helps support this general timeline, though individual variation can occur.