The analysis of fractured Ti-6Al-4V modular revision hip stems with the use of radiographic assessment, finite element analysis, and mechanical testing
Bibliographic record
Abstract
Five failed retrieved modular Ti-6A1-4V hip stems were examined to determine causes of failure.Investigation included microscopic and macroscopic analysis, finite element analysis, and mechanical testing of the modular hip implant.Method of failure was found to be fatigue, with crack initiation occurring on the lateral side of the modular junction.Bony ingrowth across the modular junction and on the proximal body was not present on both medial and lateral sides.Finite element analysis confirmed that the highest point of stress was where the crack was initiating, its magnitude, and that by case.This implies that examining patient radiographs are not exact and will only suggest certain findings, which must be confirmed or refuted by visual inspection of the Medial Bone Insrowth at BodvLateral Bone Insrowth at Bodv Distal Bone
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".