Review Question - QID 6442

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Articular Cartilage Defects of Knee QID: 6442 (SAE08OS.80)

QID 6442 (Type "6442" in App Search)

When obtaining grafts from a trochlear donor site during an osteochondral autograft transplantation procedure, where on the trochlea are the lowest contact pressures found?

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Proximal/medial

27%

85/314

Proximal/lateral

19%

61/314

Central

12/314

Distal/medial

21%

66/314

Intercondylar notch

25%

80/314

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Patellofemoral contact pressure studies have shown that the lowest contact pressures during a functional range of motion of the knee (0 degrees to 110 degrees) are located on the distal/medial surface of the trochlea. However, before a final donor site location is chosen, additional considerations include the size of the defect (the distal/medial location may not provide sufficient surface area for larger lesions) and the curvature of the recipient surface (the distal/medial surface is convex whereas the intercondylar notch is saddle-shaped).