Double‐bundle versus single‐bundle medial patellofemoral ligament reconstruction for recurrent patellar dislocation: A meta‐analysis
Bibliographic record
Abstract
Abstract Purpose To compare the clinical efficacy of single‐bundle versus double‐bundle reconstruction of the medial patellofemoral ligament (MPFL) for recurrent patellar dislocation (RPD) regarding knee function scores, postoperative complications, and imaging assessments. Methods A computerized search of PubMed, Cochrane Library, Embase, China Biomedical Literature Database (CBM), China National Knowledge Network (CNKI), and VIP Database was performed for single‐bundle versus double‐bundle reconstruction of the medial patellofemoral ligament for treatment of RPD. Randomized controlled trials (RCTs) were evaluated for quality using the risk‐of‐bias evaluation tool recommended by the Cochrane Collaboration Network, and Cohort studies (CSs) were assessed using the Newcastle‐Ottawa Scale (NOS) scale. Meta‐analysis was performed using RevMan 5.3 software and STATA 16.0. Results Thirteen studies were included, four randomized controlled studies, and nine cohort studies. The level of evidence for the four randomized controlled studies was Ⅰ, and the nine cohort studies were Ⅲ. A total of 862 (891 knees) patients were included, of which 448 (465 knees) underwent double‐bundle MPFL reconstruction and 414 (426 knees) underwent single‐bundle MPFL reconstruction. Kujala score (MD = 2.06, 95% confidence interval [CI] [0.11, 4.01], p < 0.05), Tegner score (MD = 0.39, 95% CI [0.11, 0.68], p < 0.05), International Knee Documentation Committee (IKDC) score (MD = 4.88, 95% CI [1.46, 8.31], p < 0.05), and postoperative recurrence instability (odds ratio [OR] = 0.12, 95% CI [0.04, 0.44], p < 0.05) were better in the double‐bundle group than in the single‐bundle group. Lysholm score (MD = 0.86, 95% CI [−0.76, 2.48], p = n.s), patellar tilt angle (MD = −0.22, 95% CI [−0.54, 0.10], p = n.s), patellar lateral shift rate (MD = −0.16, 95% CI [−0.41, 0.09], p = n.s), congruence angle (MD = 0.06, 95% CI [−0.41, 0.52], p = n.s), postoperative knee pain (OR = 0.39, 95% CI [0.14, 1.11], p = n.s), and additional postoperative surgical treatment (OR = 0.20, 95% CI [0.01−6.25], p = n.s) had no statistically significant differences. Conclusions Double‐bundle reconstruction of the medial patellofemoral ligament for RPD was superior to single‐bundle reconstruction in both knee function scores and postoperative recurrent patellar instability, and double‐bundle reconstruction of the medial patellofemoral ligament for RPD had better clinical outcomes. Level of Evidence Level Ⅲ, Ⅰ and Ⅲ studies.
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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 | 0.011 | 0.017 |
| Meta-epidemiology (narrow) | 0.003 | 0.001 |
| Meta-epidemiology (broad) | 0.018 | 0.037 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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".