How Spinal Flexion Influences Fracture Morphology in the Porcine Spine
Bibliographic record
Abstract
Acute injuries to the spine, including slips and falls and motor vehicle accidents, most commonly occur when the spine is positioned in flexion. Therefore, the purpose of this study was to investigate how spine position influences the morphology of vertebral fractures following rapid intervertebral disc pressurization. To investigate the effects of position on fracture morphology, 19 functional spine units (FSUs) (ten C3/4 and nine C5/6 specimens) dissected from porcine cervical spines underwent a rapid pressurization protocol. In this protocol, specimens were randomly assigned to undergo the protocol either in a neutral condition or in a 15 deg flexed condition. The rapid pressurization resulted in endplate fracture in eight of the ten specimens in the flexed condition and eight of the nine specimens in the neutral condition. When neutral and flexed specimens were compared, peak pressure, peak force, rate of pressurization, and size of fracture were not statistically different; however, flexed specimens had a significantly faster rate of depressurization, as well as a more anterior location of the fracture on the endplate. The findings of this study indicate that spine position, and specifically flexion, impacts fracture location in the anterior-posterior direction but does not appear to affect fracture likelihood or severity.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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".