Clinical Study
Minimum Lateral Bone Coverage Required for Securing Fixation of Cementless Acetabular Components in Hip Dysplasia
Table 1
Modified DeLee and Charnley classification system for acetabular fixation [
16,
17].
| Fixation grade | | Description |
| Bone ingrowth, stable | IA | No radiolucent line | IB | Radiolucent line in 1 zone | IC | Radiolucent line in 2 zones |
| Fibrous fixation, stable | II | Complete radiolucent line < 2 mm in width |
| Fibrous fixation, unstable | III | Complete radiolucent line ≥ 2 mm in width, progressive radiolucent line in zone III, or cup migration |
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