Prospective cohort of 48 patients with isolated full-thickness femoral cartilage defects treated by microfracture. The study used validated outcome scores and cartilage-sensitive MRI to identify which factors predict functional success at minimum 2-year follow-up.
Microfracture is the first-line marrow-stimulation procedure for small symptomatic femoral cartilage defects, and this paper defines who actually benefits. The decision rule: a young, lean patient (BMI under 30) with symptoms under 12 months and an isolated grade-3 or 4 femoral lesion in a stable, well-aligned knee is the ideal candidate.
Remember the mechanism for boards. Penetrating the subchondral plate recruits marrow stem cells that form fibrocartilage with type-II collagen, not durable hyaline cartilage. That explains the depressed morphology, peripheral gaps, and the late functional decline seen here.
The most testable concept is that MRI repair fill grade predicts durability. Good fill (>two-thirds) means lasting improvement; poor fill predicts decline after two years. Clinically, counsel obese patients that BMI over 30 is a relative contraindication, and do not let cartilage symptoms linger past a year before considering surgery.
Prospective cohort of 48 patients with isolated full-thickness femoral cartilage defects treated by microfracture. The study used validated outcome scores and cartilage-sensitive MRI to identify which factors predict functional success at minimum 2-year follow-up.
Microfracture is the first-line marrow-stimulation procedure for small symptomatic femoral cartilage defects, and this paper defines who actually benefits. The decision rule: a young, lean patient (BMI under 30) with symptoms under 12 months and an isolated grade-3 or 4 femoral lesion in a stable, well-aligned knee is the ideal candidate.
Remember the mechanism for boards. Penetrating the subchondral plate recruits marrow stem cells that form fibrocartilage with type-II collagen, not durable hyaline cartilage. That explains the depressed morphology, peripheral gaps, and the late functional decline seen here.
The most testable concept is that MRI repair fill grade predicts durability. Good fill (>two-thirds) means lasting improvement; poor fill predicts decline after two years. Clinically, counsel obese patients that BMI over 30 is a relative contraindication, and do not let cartilage symptoms linger past a year before considering surgery.