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The appearance of avascular necrosis (AVN) in unilateral hip dysplasia after the use of the Pavlik harness on the dysplastic side; the patients (hips) were grouped according to the length of treatment
| Months | <3 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|
| Hips with AVN | 0 | 5 | 9 | 12 | 5 | 3 | 13 | 19 |
| Number of hips | 30 | 118 | 182 | 111 | 75 | 49 | 48 | 61 |
| Incidence of AVN | 0% | 4.2% | 4.9% | 10.8% | 6.6% | 6.1% | 27.1% | 31.1% |
