Current Methods for the Evaluation and Surgical Treatment of Periprosthetic Femur Fractures Complicating Hip Arthroplasty.
Bibliographic record
Abstract
Over the next decade, orthopedic surgeons will encounter an increasing number of periprosthetic fractures of the femur after hip arthroplasty. This rise is directly related to the increasing numbers of primary and revision hip arthroplasties being performed and the aging of the population. The Vancouver classification is the most widely used classification system for periprosthetic fractures of the femur occurring after hip arthroplasty. This classification considers the location of the fracture in relation to the femoral stem, the stability of the femoral stem, and the availability of femoral bone stock for revision. Most Vancouver AG and AL fractures can be treated nonsurgically, the exceptions being fractures associated with osteolysis and clamshell fractures of the lesser trochanter. B and C type fractures usually require operative intervention. Both Vancouver B1 and C types can be treated with fracture fixation alone, as the femoral implant is stable. Vancouver types B2 and B3 require femoral revision as the implant is loose. Distinguishing between types B1 and B2 can be difficult from radiographs alone and may require computed tomography and intraoperative testing.
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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 | 0.003 | 0.006 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.008 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.041 | 0.040 |
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".