Femoral Head Vascularity. Impact and Implications for Hip Resurfacing Arthroplasty
Bibliographic record
Abstract
Summary: The blood supply to the resurfaced femoral head has been implicated in the early failure of implants. The extraosseous supply to the femoral head is threatened both during the approach and the preparation of the femoral head to receive an implant. The presence or degree of intraosseous supply is under debate as is its ability to compensate for any damage of the supply. Evidence of a decrease in the femoral head blood flow has been demonstrated due to the approach, positioning of the limb, and after preparation of the femoral head for hip resurfacing. Histologic studies have shown evidence of osteonecrosis around failed implants, and identified as a cause of femoral neck fracture after hip resurfacing. It is with this in mind that a thorough understanding of the femoral blood flow anatomy and it implications for long-term success is needed to achieve the best results in resurfacing of the arthritic femoral head. This article describes the key considerations of the vascularity of the arthritic femoral head undergoing resurfacing arthoplasty and the latest research evidence of its influence on resurfacing outcomes.
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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 | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.010 | 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".