Periprosthetic Femoral Fractures: Treatments and Outcomes. An Analysis of 47 Cases
Bibliographic record
Abstract
We evaluated the treatment and outcome of 47 cases of periprosthetic femoral fracture presenting to our unit over a nine-year period. The average follow-up period was 48 months (range 24-114). Surgical treatment involved stem revision in 29 hips, open reduction and internal fixation in 11 hips and conservative treatment in seven hips. The mean HHS at the most recent follow-up was 74 (range 49-91). Twenty-five patients were pain-free (53%), 10 patients had occasional mild pain (21%), eight patients had a limp and pain (17%) and four patients had severe disability (9%). Postoperative radiographs showed complete fracture union in all 47 patients. There were 11 complications: three further periprosthetic fractures, two aseptic loosenings, two dislocations, two aseptic loosenings of the primary prostheses, one stem breakeage, and one intraoperative fracture. Our results suggest cementless revision with tapered fluted stems used without cortical strut grafts are a valid procedure for the treatment of Vancouver B2 and B3 periprosthetic fractures.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".