| Patients | ||
|---|---|---|
| No. of cases | N=52 | |
| Mean age at index operation (range) in years | 65.9 (38.4-89.0) | |
| Mean follow up in years | 5.63 (0.01-14.05) | |
| Indication for primary THA | ||
| Primary osteoarthritis (OA) | 21 | |
| Secondary OA due to dysplasia | 17 | |
| Secondary OA after trauma | 8 | |
| Secondary OA due to avasc. necrosis/Perthes | 2 | |
| Secondary OA due to rheumatism | 4 | |
| Indication for index operation | ||
| Aseptic loosening | 42 | |
| Septic revision (one-stage/two-stage) | 7 (2/5) | |
| Recurrent dislocation | 2 | |
| Breakage of acetabular component | 1 | |
| Revised components |
Acetabulum Acetabulum and femur |
29 23 |
| Side |
Left Right |
20 32 |
| No. of acetabular revisions (index operation included) |
2nd 3rd 4th 5th 6th |
27 11 8 5 1 |
| Methods | ||
| Surgical approach | Anterior | 5 |
| Transgluteal | 39 | |
| Transtrochanteric | 8 | |
| Acetabular component | Cemented PE | 8 |
| Roof Reinforcement Ring | 29 | |
| Reconstruction Ring | 15 | |
| Allogenous bone transplant | None | 8 |
| Massive | 2 | |
| Massive and Morselized | 12 | |
| Morselized | 30 | |
| Results: function and defect situation | ||
| Merle d’Aubignée-score (range) in points | Preop. latest follow-up |
7.3 (0-14) 10.6 (0-17) |
| Pain (range) in points | Preop. latest follow-up |
1.4 (0-6) 3.4 (0-6) |
| Movement (range) in points | Preop. latest follow-up |
4.4 (0-6) 5.0 (0-6) |
| Mobility (range) in points | Preop. latest follow-up |
1.5 (0-5) 2.2 (0-5) |
| No. of cases with ‘poor/tolerable/good’ Merle-Score (<9, 9-14, >14 pts.) | Preop. latest follow-up |
32/20/ 0 13/31/8 |
| Bone defect at latest follow-up (no. of cases) |
Increasing Constant Partial restoration Complete |
12 13 13 14 |