Table 1 Paprosky classification of acetabular bone loss – created according to Classifications In Brief - Paprosky Classification of Acetabular Bone Loss [19]
Defect | Tear drop | Superior dome | Anterior column | Posterior column | Bone bed |
|---|---|---|---|---|---|
Type 1 | Present | No migration | Intact | Intact | Mild (> 50% cancellous) |
Type 2A | Intact | Mild migration < 2 cm superior | Intact | Intact | Moderate (< 50% cancellous) |
Type 2B | Intact | Mild migration < 2 cm superolateral | Intact | Intact | Moderate (< 50% cancellous) |
Type 2C | Moderate destruction | Mild migration < 2 cm medial | Disrupted | Intact | Moderate (< 50% cancellous) |
Type 3A | Moderate destruction | Severe migration > 2 cm superolateral | Intact | Moderate lysis | Severe 10–2 o’clock loss (40–70% sclerotic) |
Type 3B | Complete obliteration | Severe migration > 2 cm superomedial | Disrupted | Severe lysis | Severe 9–5 o’clock loss (30% sclerotic) |