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AVASCULAR NECROSIS AFTER SLIPPING OF THE UPPER FEMORAL EPIPHYSIS



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Abstract

1. Avascular necrosis of the bony epiphysis or necrosis of the articular cartilage of the hip joint–without bony necrosis–can occur after a slipped upper femoral epiphysis.

2. In avascular necrosis of the bony epiphysis the prognosis depends upon the degree of revascularisation that occurs and upon survival of the articular cartilage. The articular cartilage can survive and a good functioning hip result especially if aided by mobilisation without weight bearing.

3. The prognosis after necrosis of the articular cartilage is poor. This complication occurs more often when conservative treatment is used.

4. A certain number of hips will show poor results no matter what treatment is used.

5. Nutrition of the articular cartilage is probably by the synovial fluid.

6. Strong traction may damage the soft-tissue structure of the hip joint.

7. It is not advisable to perform an osteotomy soon after a slip of the epiphysis. It is better to wait until good function is assured in the joint.

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