A Rare Case of Periprosthetic Fracture with Fracture of Femoral Stem around a Bipolar Hemiarthroplasty
Bibliographic record
Abstract
Introduction: The incidence of periprosthetic fractures (PPF) around a total hip arthroplasty continues to increase with the rise in number of arthroplasties performed. However, fracture of the femoral stem has become very rare since the development of modern prosthetic designs. We present a rare case of an 80-year-old man who sustained a periprosthetic femur fracture with a fracture of the femoral stem component around a bipolar hemiarthroplasty. Case Report: This man sustained a Vancouver type B1 periprosthetic femur fracture with a fracture of the femoral stem component around a fully cemented bipolar hemiarthroplasty done 10 years back. This patient was treated with removal of the broken femoral stem and osteosynthesis with a plate and cerclage wire plus revision to a longer stem prosthesis. Conclusion: PPF with a fracture of the femoral stem around a hemiarthroplasty is a rare and uncommon occurrence. A combination of osteosynthesis with revision arthroplasty with a longer stem proved to be a suitable treatment with satisfactory results. However, regular follow-ups post-arthroplasties are advocated to identify complications at an earlier stage.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".