Internal fixation of Vancouver B2 periprosthetic femoral fractures: Can it be an alternative to the revision arthroplasty?
Bibliographic record
Abstract
Abstract This study evaluated outcomes of open reduction and internal fixation (ORIF) for the treatment of Vancouver B fracture and analyzed factors affecting prognosis of internal fixation in Vancouver B2 fractures. From January 2009 to August 2021, 14 Vancouver B1 and 22 Vancouver B2 fractures that underwent ORIF were investigated. Clinical outcomes of adequacy of fracture reduction, duration of bone union, femoral stem subsidence were evaluated as well as revision rates and postoperative complications. The average union time for B1 was 14.5 weeks (7–25), the average union time for B2 was 21.0 weeks (8–36). (P = 0.053) Fracture reduction was poor in 1 case in B1 and 10 cases in B2. (p = 0.025) Stem subsidence occurred in 6 cases and revision surgery in 3 cases, all of which occurred in the poor reduction group. Of the 6 cases of stem subsidence, 3 cases were cemented stem and all cements were broken. (p = 0.046). ORIF on Vancouver B2 fracture showed relatively satisfactory results, so it is expected to be an alternative to revision arthroplasty in selected Vancouver B2 fracture. Accurate anatomical reduction during surgery is important to avoid reoperation and femoral stem subsidence. Revision would be better than internal fixation in mantle broken cemented stem Vancouver B2 fracture.
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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 | 0.001 | 0.002 |
| 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 | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".