Cartilage Biology
A 28-year-old athlete presents with knee pain and mechanical symptoms after an ACL injury 6 months ago. MRI shows an 18mm full-thickness cartilage defect on the medial femoral condyle. Arthroscopy confirms a contained chondral defect with healthy surrounding cartilage. The surgeon discusses the unique properties of articular cartilage and potential repair options including microfracture, OATS, and ACI. Regarding articular cartilage:
Mark each as TRUE or FALSE
Hyaline articular cartilage is composed of water (65-80%), type II collagen (10-20%), proteoglycans ...
Cartilage has four zones: superficial/tangential (thin collagen fibers parallel to surface, highest ...
Articular cartilage is primarily type I collagen; chondrocytes comprise 50% of the tissue; cartilage...
Cartilage has limited healing capacity: partial thickness defects (within cartilage) do not heal bec...
Repair strategies include marrow stimulation (microfracture - forms fibrocartilage), osteochondral a...
Answer the questions to see explanations
Click T (True) or F (False) for each option