Revival of a Relic: Extra-Long Austin Moore Prosthesis in Revision Arthroplasty for Vancouver B3 Periprosthetic Femur Fracture—A Case Report
Bibliographic record
Abstract
Abstract Background: Vancouver type B3 periprosthetic femoral fractures present significant surgical challenges due to a loose femoral stem and deficient proximal bone stock. Management typically requires modular, fluted, and tapered revision stems; however, these may be unavailable in resource-limited settings. Case Presentation: We report a 68-year-old male with a 6-year-old bipolar hemiarthroplasty who sustained a low-energy fall resulting in a Vancouver B3 fracture with stem breakage. Preoperative evaluation, including inflammatory markers and intraoperative cultures, ruled out infection. Due to limited access to modern revision implants, a non-cemented extra-long Austin Moore prosthesis was used to achieve distal diaphyseal fixation. Stability was enhanced with a trochanteric locking plate and cerclage cables. Outcomes: Postoperative recovery was uneventful, and the patient commenced supervised full weight-bearing from day 1. At 1-year follow-up, the Harris Hip Score was 78, the Oxford Hip Score was 32, the limb length discrepancy was <1 cm, and the hip range of motion was satisfactory. Radiographs confirmed maintained implant alignment and callus formation. Conclusion: In the absence of modular revision stems, an extra-long Austin Moore prosthesis with adjunctive fixation can provide short-term functional and radiological success in Vancouver B3 fractures. This approach should be considered a salvage strategy and not a standard treatment. Long-term surveillance is planned to assess implant durability.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.002 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.005 | 0.002 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".