Recent orthopedic meta-analyses

New meta-analyses from the weekly pipeline, judged on what they pooled and how certain the pooled answer really is — hottest first.

Journal of Orthopaedic Surgery and Research IF 2.8 Jul 31 2026 LoE I Full text read

Arthroscopic versus open reduction and internal fixation for tibial plateau fractures: a meta-analysis

This meta-analysis pooled 18 randomized controlled trials (1,346 patients) comparing arthroscopy-assisted reduction and percutaneous internal fixation (ARIF) with standard open reduction and internal fixation (ORIF) for Schatzker type I-III tibial plateau fractures. Patients treated with ARIF were about three times more likely to have an excellent-good functional outcome (OR 3.14, 95% CI 2.02-4.88, p<0.001) and had markedly fewer perioperative complications (OR 0.27, 95% CI 0.18-0.40, p<0.001) than those treated with ORIF.

AI summary · from the full text

Why it mattersTibial plateau fractures are common trauma cases, and this pooled RCT evidence suggests arthroscopic-assisted fixation for lower-grade fractures may offer better function and fewer complications than the traditional open approach.

Meta-analysisTrauman = 346DOI ↗

Presenting this at rounds? Start here

?For a patient with a simple (Schatzker I-III) tibial plateau fracture, would you now favor an arthroscopic-assisted approach over standard open fixation, and what factors (surgeon experience, equipment access) would influence that choice?
?How should this pooled complication and functional-outcome data change counseling for patients about expected recovery and reoperation risk after tibial plateau fracture surgery?

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BMJ IF 55.1 Sep 9 2026 LoE I Full text read

Effect of exercise on bone health in middle aged and older adults: hierarchical network meta-analysis of randomised trials

This network meta-analysis pooled 124 randomized trials (18,429 adults ≥40 years) comparing different exercise types against no-exercise controls for bone mineral density (BMD) and fracture risk. Brisk walking/jogging and combined aerobic-resistance training produced the largest, though modest, BMD gains (e.g., lumbar spine mean difference 0.013 g/cm², 95% CrI 0.006 to 0.021), while mixed aerobic exercise (odds ratio 0.29) and mind-body exercise (odds ratio 0.58) were associated with lower fracture risk; effects generally plateaued above roughly 600-900 METs-min/week of activity.

AI summary · from the full text

Why it mattersGives clinicians a starting point for prescribing specific exercise types and doses to preserve bone density and reduce fracture risk in aging patients, an issue relevant to orthopedic, primary care, and rehabilitation counseling.

Meta-analysisArthroplastyn = 429DOI ↗

Presenting this at rounds? Start here

?For a patient with osteopenia who dislikes high-impact activity, would substituting mind-body exercise (like tai chi) provide comparable fracture-risk reduction to more traditional aerobic programs?
?Given that BMD benefits plateaued around 600-900 METs-min/week, how should clinicians balance recommending 'more is better' exercise advice against fall risk in older, frailer patients?

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Journal of Orthopaedic Surgery and Research IF 2.8 Sep 9 2026 LoE I Full text read

Robotic-assisted versus conventional total knee arthroplasty: an updated systematic review and meta-analysis of randomized controlled trials with grade assessment

This is a meta-analysis of 31 randomized trials (4086 patients) comparing robotic-assisted total knee arthroplasty (RTKA) to conventional TKA. RTKA modestly improved several radiographic alignment measures, most notably reducing hip-knee-ankle deviation by 0.83 degrees and cutting the rate of alignment outliers roughly in half, but patient-reported function, pain, biomarkers, blood loss, hospital stay, and overall complications were largely similar between groups, while robotic surgery took about 21 minutes longer on average.

AI summary · from the full text

Why it mattersRTKA is being rapidly adopted based on the promise of better alignment, so trainees should know that improved radiographic precision has not yet reliably translated into better patient-reported outcomes.

Meta-analysisArthroplastyn = 4,086DOI ↗

Presenting this at rounds? Start here

?If radiographic alignment improves with robotic assistance but patient-reported function does not, how should this change how you counsel patients about choosing RTKA versus conventional TKA?
?Given that RTKA adds about 20 minutes of operative time without clear functional benefit, how should surgeon experience, case complexity, and institutional resources factor into deciding which patients are best suited for robotic assistance?

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Journal of Orthopaedic Surgery and Research IF 2.8 Aug 22 2026 LoE II Full text read

Bone marrow stimulation in arthroscopic rotator cuff repair: a meta-analysis

This meta-analysis pooled 15 comparative studies (1552 patients) comparing arthroscopic rotator cuff repair (ARCR) with versus without bone marrow stimulation (BMS, e.g. microfracture or marrow venting of the greater tuberosity). Overall, adding BMS was associated with a lower retear rate (14% vs 18%, OR 0.69, 95% CI 0.51-0.92, p=0.01), an effect driven mainly by single-row repairs (16% vs 27%, p=0.0002), while the double-row subgroup showed a similar trend that was not statistically significant (11% vs 16%, p=0.07). Postoperative ASES and Constant-Murley scores and forward elevation were modestly better with BMS, but simple shoulder test, UCLA score, VAS pain, and rotation were unchanged between groups.

AI summary · from the full text

Why it mattersRetear after rotator cuff repair remains common, and this synthesis suggests a cheap, autologous biologic augmentation (marrow venting) may reduce retear risk, particularly when using single-row fixation, which is clinically relevant for surgeons deciding whether to add BMS during ARCR.

Meta-analysisShoulder & Elbown = 1,552DOI ↗

Presenting this at rounds? Start here

?Should surgeons preferentially add bone marrow stimulation when performing single-row rather than double-row rotator cuff repairs, given the differential retear benefit seen here?
?Given the marginal functional score differences (ASES +1.6, CMS +2.5 points) versus reported MCIDs, should BMS be adopted primarily to reduce retear risk rather than to improve patient-reported function?

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Knee Surgery Sports Traumatology Arthroscopy IF 3.3 Sep 11 2026 LoE III Full text read

The role of generalised joint Laxity in anterior cruciate ligament reconstruction: A systematic review and meta‐analysis

This meta-analysis pooled 13 studies (3905 patients) comparing outcomes of ACL reconstruction in patients with generalised joint laxity (GJL) versus without. Patients with GJL had significantly lower IKDC and Lysholm scores and higher rates of positive Lachman and pivot shift tests, but the difference in graft failure rate (9.2% vs 6.1%) was not statistically significant (OR 3.15, p=0.07).

AI summary · from the full text

Why it mattersSurgeons often wonder whether hyperlax patients need a different graft or added lateral procedure, and this review shows the evidence for worse clinical outcomes is inconsistent and failure rates are not statistically different.

Meta-analysisSportsn = 3,905DOI ↗

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Spine IF 2.6 Aug 13 2026 LoE III Full text read

Proximal Junctional Failure After Adult Spinal Deformity Surgery

This meta-analysis pooled 28 retrospective cohort studies (4560 patients) to find predictors of proximal junctional failure (PJF) after adult spinal deformity surgery, which occurred in 23.3% of patients. PJF was linked to older age, worse baseline disability/pain, greater preoperative sagittal malalignment (higher pelvic tilt, SVA, PI-LL mismatch, lower lumbar lordosis), and poorer local bone quality, most strikingly lower CT-derived Hounsfield units at the upper instrumented vertebra (mean difference -28.97 HU) and the level above (-32.67 HU), with HU showing good diagnostic discrimination for PJF (pooled AUC 0.86). Notably, fusion length and UIV level (above/below T10) were not associated with PJF, suggesting risk depends more on alignment demands and bone competence than construct size alone.

AI summary · from the full text

Why it mattersPJF is a common, morbid complication of deformity surgery, and this synthesis suggests opportunistic Hounsfield unit measurement from routine preoperative CT could help surgeons flag high-risk patients before choosing fusion strategy.

Meta-analysisSpinen = 4,560DOI ↗

Presenting this at rounds? Start here

?If a patient has low Hounsfield units at the planned upper instrumented vertebra along with severe sagittal malalignment, should surgeons routinely delay surgery for bone-health optimization or modify the construct (e.g., choosing L5 over sacral/pelvic fixation) to reduce PJF risk?
?Given that binary osteoporosis diagnosis was not predictive but continuous DEXA T-score and CT attenuation were, should preoperative osteoporosis screening for deformity surgery shift away from a simple osteoporosis/non-osteoporosis label toward routine opportunistic HU reporting on staging CTs?

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The Knee IF 1.6 Aug 25 2026 LoE II Full text read

Functional outcomes of patient-specific instrumentation versus conventional instrumentation for unicompartmental knee replacement: A systematic review and meta-analysis

This systematic review and meta-analysis compared patient-specific instrumentation (PSI) with conventional instrumentation (cUKA) in unicompartmental knee replacement, pooling 14 studies (1,680 knees, 1,670 patients: 5 RCTs and 9 retrospective comparisons). At 1-year follow-up, Oxford Knee Score was essentially the same between groups (mean difference 0.9, 95% CI -2.65 to 4.45, I2=0%), and secondary scores (KSS, KOOS) also showed no significant differences at 3 months or 1 year; revision rates were numerically higher with PSI (6% vs 2.3%) but too heterogeneous to pool statistically.

AI summary · from the full text

Why it mattersPSI is being marketed as a way to improve component positioning and outcomes in UKA, so trainees should know the current pooled functional evidence does not support any advantage over standard instrumentation.

Meta-analysisArthroplastyn = 1,680DOI ↗

Presenting this at rounds? Start here

?If PSI does not improve patient-reported function at 1 year, should its added cost and preoperative imaging burden change how surgeons select instrumentation for UKA candidates?
?Given the higher (though unpooled) revision rate with PSI, particularly aseptic loosening, how should this influence counseling of patients considering UKA with custom guides versus conventional technique?

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