Modified Halifax Interlaminar Clamp with Shaped Autograft Secured with Polydioxanone (PDS) Improves C1-C2 Fusion
Bibliographic record
Abstract
Background: We describe the Halifax interlaminar clamp with shaped autograft secured technique with PDS(superscript ®) in C1-C2 fusion. Modem C1-2 fusion techniques have a potentially high risk of neurovascular injury and are highly technical. We hypothesize a Halifax interlaminar clamp with shaped autograft and PDS-secured technique for C1-2 instability is sufficient for stabilization. Methods: From May 1995 to June 2006, we conducted a retrospective review of thirty-eight consecutive patients with atlantoaxial instability who were administered a Halifax clamp with shaped bone graft, secured with PDS(superscript ®) and morselized grafts by the same neurosurgeon. Results: Over a ten-year period, thirty-eight patients received posterior stabilization of C1-2 surgery. Thirty-five patients had good results and three had complications. These cases had an average follow-up of 50 months (range 24-96 months). All patients attained solid fusion without instrument failure. Conclusions: A Halifax clamp with shaped bone graft, secured with PDS(superscript ®) and morselized grafts in C1-2 fusion, provides stability. There is no risk of neurovascular injury in sublaminar wiring, highly technical transarticular screw fixation or in lateral mass screw fixation.
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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 | 0.000 | 0.000 |
| 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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 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 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".