Single-Stage Triple Procedure Bilateral Hip Open Reduction, Acetabuloplasty, and Femoral Shortening for Late Diagnosed Patients With Developmental Dysplasia of the Hip
Bibliographic record
Abstract
BACKGROUND: Developmental dysplasia of the hip is a challenging pediatric condition requiring timely and effective surgical management. This study evaluates the clinical and radiographic outcomes of a simultaneous bilateral single-stage triple procedure, which integrates open reduction, acetabuloplasty, and femoral shortening osteotomy. This approach offers a potential alternative to standard staged procedures by reducing treatment time and cumulative anesthesia exposure. METHODS: This retrospective study included 54 patients who underwent a standardized simultaneous bilateral single-stage procedure at two tertiary centers. The average age at the time of surgery is 3 ± 1.5 years. Clinical and radiographic outcomes were assessed, with follow-up extending to an average of 3 years. RESULTS AND CONCLUSION: In our study of 54 patients (108 hips), significant improvements were noted after surgery with a mean reduction in the acetabular index of 27° ± 7° for the right hip and 26° ± 6° for the left hip (P = 0.0001). The Severin classification indicated 83% excellent, 13% good, and 4% poor outcomes. Redislocation occurred in 6% of hips, with no significant differences in osteonecrosis, lateral subluxation, or redislocation based on sex or age (P > 0.05). All patients achieved good-to-full range of motion by the final follow-up.
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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 | 0.001 |
| 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 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".