Table 2.
Comparison of results on studies of various treatment options for revision surgery with acetabular bone defects
| Technique | Study | No. of patient cases | Mean (range) followup in years | Acetabular defect type | Endpoint | Cup survivor-ship in % | Change in pre- and post-op function | Comments |
|---|---|---|---|---|---|---|---|---|
| Impacting bone grafting | Buttaro et al. [1] | 23 | 3 (2–4.7) | AAOS: Type III | Rerevision for any cause | 90 | No pre-op functional scores | All cups migrated (mean 5.1 mm, range, 2–25 mm) |
| Van Haaren et al. [23] | 71 | 7 (1.6–9.7) | AAOS: 13 type I 17 type II 35 type III 6 Type IV |
Rerevision for aseptic loosening | 72 | No functional scores | 70% of the failed group had AAOS type III and IV defects | |
| High hip center arthroplasty | Morag et al. [13] | 31 | 10 (3–20) | Congenital acetabular dysplasia | Revision for non-septic causes | 82 (HHC) compared to 94 (non-HHC) for 10-year KM | No pre-op functional scores | Poorer results with HHC - hip centre is more than 35 mm above teardrop |
| Uncemented oblong cup | Herrera et al. [8] | 35 | 6.3 (4–8) | AAOS: 29 type III 6 type IV |
Revision for cup stability | 86 | mean HHS improved by 42 | |
| Koster and Rading [10] | 56 | 9 (8–12) | Paprosky: 3 type I 39 type II 14 type III |
Rerevision for any cause | 93 | mean HHS improved by 31 | ||
| Acetabular reinforcement rings | Gerber et al. [6] | 50 | 6 (5–8.4) | AAOS: 24 type II 24 type III 2 type IV |
Rerevision or radio-graphic loosening | 81 (KM at 10 years) | mean MAPS improved by 5 | |
| Schlegel et al. [18] | 164 | 6 (2–17) | AAOS: 11 type I 33 type II 92 type III 8 type IV 20 without defect |
Rerevision for any cause | 90 | No pre-op functional scores | ||
| Trabecular metal and augments | Lakstein et al. [11] | 53 | 3.8 (2–6) | contained defects of more than 50% of the acetabulum | Rerevision for cup migration | 96 | mean MAPS improved by 5.2 | |
| Sporer and Paprosky [21] | 28 | 3.1 (1–4) | Type III | Rerevision for any causes | 96 | mean MAPS improved by 3.8 | ||
| Weeden and Schmidt [24] | 43 | 2.8 (2–4) | 33 Type III 10 Type IV |
Rerevision for any causes | 98 | mean MAPS improved by 4.9 mean HHS improved by 52 |
MAPS = Merle d’Aubigne-Postel Score; HHS = Harris Hip Score; KM = Kaplan-Meier; HHC = High hip center.