A Novel Intravertebral Fixation Technique of Lumbar Osteoporotic Vertebral Bipedicular Dissociation Fractures
Bibliographic record
Abstract
OBJECTIVE: A significant portion of traumatic spinal fractures involves the thoracolumbar spine. Fracture stabilization using pedicle screws initially demanded fixation of two levels above and below the fractured vertebra to achieve a stable construct. Over the years, a short-segment pedicle screw fixation was found to be adequate. Balloon kyphoplasty (BKP) is commonly used as a minimally invasive treatment for vertebral compression fractures. At times, lumbar burst fractures can extend to the posterior elements. These recently acknowledged subtypes of fracture do not cause posterior column instability other than coronal bipedicular dissociation. BKP alone is inadequate in these cases; a combination of BKP addressing anterior column reduction and support with a middle column stabilization by transpedicular fixation has the potential to treat all fracture elements without losing motion segments through a minimally invasive technique. This study aims to describe this novel concept and technique. METHODS: Five patients were treated with the intravertebral fixation (IVF) technique for coronal bipedicular dissociation fractures. We describe the surgical technique and review the pertinent literature. RESULTS: The IVF technique is clinically safe in stabilizing the specified fractures, with good clinical and functional outcomes. CONCLUSION: IVF is a promising surgical technique and an exciting treatment concept for unique fracture types involving bipedicular coronal dissociation with or without burst fracture. Further studies are required to assess long-term results and possible complications. STUDY DESIGN: Case series for a new surgical technique.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".