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Results of Free Vascularized Fibula Grafting Using the Steinberg's Classification System.
| Stage | Hips with Excellent or Good Score (> 70) | Radiographic Progression | Conversion to THA |
| IB (n = 2) | 2 hips | 0 | 0 |
| IC (n = 1) | 1 hip | 1 hip | 0 |
| IIA (n = 1) | 1 hip | 0 | 0 |
| IIB (n = 3) | 3 hips | 0 | 0 |
| IIC (n = 24) | 20 hips | 9 hips | 1 hip |
| IIIB (n = 1) | 1 hip | 0 | 0 |
| IIIC (n = 2) | 0 | 2 hips | 2 hips |
| IVA (n = 2) | 2 hips | 0 | 0 |
| IVB (n = 8) | 3 hips | 4 hips | 3 hips |
| IVC (n = 24) | 14 hips | 16 hips | 5 hips |
| VC (n = 3) | 0 | 3 hips | 2 hips |
