Posterior Cruciate-Retaining vs Posterior Cruciate-Stabilized Prosthesis in Total Knee Arthroplasty: A Meta-Analysis.
Bibliographic record
Abstract
Objective: To evaluate the clinical and imaging results of posterior cruciate-retaining vs the posterior cruciate-stabilized method in total knee arthroplasty (TKA). Methods: PubMed, EMbase and Cochrane Library databases were used to retrieve randomized controlled trials (RCTs) concerning the posterior cruciate-retaining vs posterior cruciate-stabilized method in TKA. Determination of study quality and data extraction were performed by 2 reviewers. Study heterogeneity was assessed by ReviewManager (RevMan) software and meta-analysis was conducted. Results: A total of 15 RCTs were finally included in our meta-analysis. The results showed that no significant differences were found in the American Knee Society Score (AKSS) (MD = 0.13; 95% CI, -0.73 to 1.00), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) (MD = 0.59; 95% CI, 0.00-1.18), knee extension range of motion (MD = 0.10; 95% CI, -0.30 to 0.51)] or posterior tibial slope (MD = -0.09; 95% CI, -0.52-0.33) after surgery between the 2 groups. Compared with the posterior cruciate-retaining prosthesis group, in the posterior cruciate-stabilized prosthesis group the active knee joint range of motion was significantly increased (MD = -6.99; 95% CI, -9.17 to -4.81), knee flexion was significantly increased (MD = -4.22; 95% CI, -6.03 to -2.41) and the mechanical tibial angle was closed to 6° (MD = 0.85; 95% CI, 0.46-1.25). There were no significant differences in residual knee pain (OR = 1.26; 95% CI, 0.57-2.78), infection rate at the surgical site (OR = 0.50, 95% CI, 0.13-1.88) or revision rate (OR = 0.59; 95% CI, 0.15-2.32) between the 2 groups. Funnel plot revealed no significant bias in the included studies. Conclusions: In summary, patients who received a posterior cruciate-stabilized prosthesis had better knee joint active range of motion, knee flexion and mechanical femorotibial angle than patients who received a posterior cruciate-retaining prosthesis. Due to the surgical difficulty involved in a posterior cruciate-retaining prosthesis, junior doctors should choose a posterior cruciate-stabilized prosthesis first, and senior doctors should choose the prosthesis according to the patient's condition and the surgeon's proficiency at performing the surgery in question.
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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 | 0.014 | 0.021 |
| Meta-epidemiology (narrow) | 0.003 | 0.002 |
| Meta-epidemiology (broad) | 0.018 | 0.051 |
| Bibliometrics | 0.005 | 0.004 |
| 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) | 0.003 | 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".