Table 3 List of revisions (mechanical).
Case | Primary implant | Cause for revision/failure mode | Age | TTR (d) | TAD (mm) | Blade position TFNA | Integrity of medial calcar | NSA(°) | AO/OTA | Contralateral CTI | Type of revision surgery | Relevant comorbidities |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
4 | TFNA | Cut-out of helical blade, varus impaction | 91 | 14 | 31 | Superior | Not intact | 114 | 31A2.3 | 0.654 | Implant removal and implantation of THA | |
8 | Cemented HA | Periprosthetic fracture after recurrent low-energy trauma | 85 | 62 | 31B2.2 | Change of implant and plate osteosynthesis | Parkinson’s disease, frailty | |||||
10 | TFNA | Cut-through of helical blade | 82 | 55 | 19 | Centre | Intact | 133 | 31A2.3 | 0.481 | Removal of blade and replacement with shorter blade | |
11 | TFNA | Intraoperative fracture distal to nail detected postoperatively | 87 | 14 | 10 | Centre | Intact | 122 | 31A1.3 | 0.64 | Change to a long endomedullary nail | |
12 | TFNA | Postoperative varus dislocation → cut-out of helical blade | 91 | 102 | 30 | Antero-superior | Not intact | 108 | 31A2.2 | 0.6 | Implant removal and implantation of THA | Parkinson’s disease, frailty, malnutrition (BMI 19) |
14 | TFNA | New low-energy trauma → varus dislocation (close to cut-out) | 74 | 123 | 19 | Posterior | Not intact | 131 | 31A2.2 | 0.571 | Removal of blade and replacement with shorter blade | Epilepsy, malnutrition (BMI 18) |
15 | Cemented HA | Periprosthetic fracture after recurrent low-energy trauma | 80 | 36 | 31B2.1 | Change of implant and plate osteosynthesis | Diabetes, COPD | |||||
16 | TFNA | Tractus irritation through blade subsidence | 83 | 238 | 16 | Superior | Intact | 127 | 31A1.3 | 0.552 | Removal of blade and replacement with shorter blade | |
17 | TFNA | Tractus irritation through blade subsidence | 87 | 327 | 20 | Posterior | Not intact | 134 | 31A1.2 | 0.593 | Removal of blade and replacement with shorter blade | Parkinson’s disease, frailty |
18 | TFNA | New low-energy trauma → new Fracture and blade dislocation with cut-through | 83 | 39 | 19 | Centre | Not intact | 131 | 31A2.2 | 0.560 | Removal of blade and replacement with shorter blade |
