Table 1.
Preoperative findings of hip dysplasia according to Tonnis classification
| Tonnis grades | Number (%) of hips affected |
|---|---|
| Grade 1 | 3 (5.18) |
| Grade 2 | 23 (39.65) |
| Grade 3 | 12 (20.69) |
| Grade 4 | 20 (34.48) |
| Total | 58 (100) |
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