Does a Zero-Profile Anchored Cage Offer Additional Stabilization as Anterior Cervical Plate?
Bibliographic record
Abstract
In Brief Study Design. Retrospective cohort study. Objective. This study aimed to compare 3 different surgical methods of single-level anterior cervical interbody fusion consisting of stand-alone cages (SCs), cages with plates (CPs), and anchored cages (ACs) (zero-profile). It focused on postoperative retention and motion stabilization. Summary of Background Data. Several authors reported the radiological and clinical results of ACs, which seem similar to plates. However, it remains unclear whether ACs offer additional stabilization like plates. Methods. Between 2005 and 2011, SCs (n = 60) and CPs (n = 18) were used to surgically treat patients with single-level cervical degenerative diseases. From January 2012 to June 2013, ACs were used (n = 23). We compared retention (cervical alignment, segmental angle, and segmental height) and motion stabilization (change of segmental angle and distance of interspinous process in flexion/extension). We also investigated subsidence, fusion rates, and clinical outcomes. The mean follow-up period was 19.9 months. Results. The CP and AC groups showed significantly more retention at 12 months after surgery than the SC group (P < 0.05). The CP group had significantly greater motion stabilization than the SC group (P < 0.05). However, there was no statistically significant difference between the AC and SC groups. The subsidence rates of the SC, AC, and CP groups were 40.0%, 21.7%, and 11.1%, whereas the fusion rates were 83.3%, 87.0%, and 100.0%, respectively. Arm and neck visual analogue scale scores and Odom criteria showed superior results in the CP and AC groups than in the SC group (P < 0.05). Conclusion. The AC displayed similar retention and clinical outcomes to those of the CP. However, the AC was inferior to the CP in motion stabilization, subsidence prevention, and fusion rate. Therefore, for patients who require strong postoperative motion stabilization, CPs rather than ACs should be used. Level of Evidence: 4 The anchored cage displayed similar retention and clinical outcomes to those of the cage with plate. However, the anchored cage was inferior to the cage with a plate in motion stabilization, subsidence prevention, and fusion rate. Therefore, for patients who require strong postoperative motion stabilization, cages with plates rather than anchored cages should be used.
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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) | 0.031 | 0.001 |
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; both teacher heads agree on what is shown here.
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".