Scaphoid Excision and 4-Corner Fusion Using Retrograde Headless Compression Screws
Bibliographic record
Abstract
Scapholunate advanced collapse is a predictable form of wrist arthritis resulting from longstanding scapholunate instability. Four-corner fusion and scaphoid excision is a reliable procedure used to treat scapholunate advanced collapse wrist that improves pain and preserves range of motion. Multiple methods of achieving fixation have been described for the procedure including K-wires, staples, and headless compression screws. In previously described techniques, the compression screws are inserted in an antegrade manner, breaching the articular surface of the lunate. Even small areas of chondral damage may undermine the long-term durability of the radiocarpal joint. Given the 4-corner fusion relies on the integrity of the radiolunate articulation for success, it would seem advantageous to preserve the articular cartilage of the lunate. The technique described here involves retrograde insertion of headless compression screws to achieve a 4-corner fusion. Although it is still early, we anticipate that this procedure will result in similar fusion rates to other forms of 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 | 0.002 | 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) | 0.000 | 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".