Fig. 1From: Degradation of subchondral bone collagen in the weight-bearing area of femoral head is associated with osteoarthritis and osteonecrosisDiagrams of sample preparing procedures. a Area marked in red indicated weight-bearing area of femoral head. b Weight-bearing area measured 7 mm below the articular surface. c Subchondral bone obtained for testing and five SEM observation pointsBack to article page