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A PATHWAY FOR NUTRIENTS FROM THE MEDULLARY CAVITY TO THE ARTICULAR CARTILAGE OF THE HUMAN FEMORAL HEAD

A. S. Greenwald 1; and D. W. Haynes 1

1 Department of Engineering Science, Oxford University, and the Nuffield Department of Orthopaedic Surgerl, Nuffieki Orthopaedic Centre, Oxford, England

1. The routes by which adult human articular cartilage can receive its nutrition is still a subject of controversy.

2. Microscopic examination of normal adult human femoral heads has revealed vascular channels which penetrate the subchondral plate and calcified cartilage. These channels bring the medullary soft tissue into contact with the articular cartilage.

3. A fluorescent dye migration technique was used to show that the observed vascular channels are pathways for dye from the medullary cavity to the articular cartilage. It is suggested that these pathways could also be routes by which articular cartilage receives part of its nutrition.

4. The nutritional mechanism in the mature rabbit and adult human femoral heads cannot be compared because histological studies revealed differences in their subchondral structures.
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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General