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The appearance of avascular necrosis (AVN) in unilateral hip dysplasia after the use of the Pavlik harness on the normal contralateral side; the patients (hips) were grouped according to their ages at the start of treatment
| Months | <3 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|
| Hips with AVN | 9 | 5 | 2 | 2 | 0 | 1 |
| Number of hips | 317 | 102 | 129 | 66 | 26 | 34 |
| Incidence of AVN | 2.8% | 4.9% | 1.6% | 3% | 0% | 2.9% |
