Weekly Digest

Key Takeaway: Adding triangular titanium implants (TTI) suprajacent to S2AI screws reduced the composite pelvic fixation failure rate from 20.4% to 11.0% (p=0.0415) at 24 months in multilevel adult spinal deformity fusion.

Key Takeaway: A structured multidomain lifestyle intervention produced a 0.11 SD/year greater improvement in global cognitive composite scores versus flexible health advice in at-risk Latin American older adults (p<0.0001).

Key Takeaway: One-stage exchange arthroplasty achieved 97% 2-year success versus 91% for two-stage exchange (p=0.04, OR 3.22) in chronic PJI following primary THA or TKA.

Key Takeaway: In 422 open tibial fractures across 18 Latin American trauma centers, initial definitive IMN was associated with significantly higher 1-year SF-12 PCS, MCS, and mRUST scores compared to staged fixation, yet staged management was applied even to low-grade (GA Type I/II) injuries.

Key Takeaway: CEUS detected a post-reduction decrease in femoral head perfusion index in 79.4% of hips after surgical DDH reduction, with the greatest perfusion loss in the central epiphyseal region and axial abduction correlating with perfusion decrease (r=0.35, p=0.04).

Key Takeaway: Only 65.7% of TKA patients achieved the CMS-defined SCB of 20 KOOS-JR points at 1 year, despite 86.8% achieving the distribution-based MCID, suggesting the CMS benchmark systematically misclassifies successful TKAs as failures.

Key Takeaway: Hip fractures affect 280,000 Americans annually with a median 1-year mortality of 22% and only 42–71% of patients regaining prefracture ADL function within 6 months.

Key Takeaway: EMG-guided early rehabilitation starting at 1 week post-repair reduced night pain by 2.56 points and activity pain by 2.73 points (both exceeding MCID) at 4 weeks versus 4-week immobilization, with no difference in any outcome at 12 months.

Key Takeaway: 47.9% of ATR surgical patients had preoperative anxiety/depressive symptoms, and this subgroup demonstrated significantly worse postoperative anxiety and functional outcomes (AOFAS, ATRS) at final follow-up despite equivalent pain improvement.

Key Takeaway: Mepivacaine spinal anesthesia reduced postoperative urinary retention by 80% (OR 0.20) versus bupivacaine and demonstrated the most favorable overall recovery profile across THA and TKA in this network meta-analysis of 1,914 patients.

Key Takeaway: Depressed TKA patients achieve similar magnitude of pain and functional improvement as non-depressed patients despite reporting worse absolute postoperative PROM scores across 10 prospective studies (n=2,682).

Key Takeaway: A Predictive Recovery Score integrating MRS metabolite ratios (Cho/NAA, Cr/NAA, MIn/NAA) with clinical and MRI parameters achieved an AUC of 0.92 for predicting good versus poor postoperative recovery in DCM, versus 0.74 for clinical parameters alone.

Key Takeaway: After rTSA, the COR is medialized by 12.9 mm and distalized by 5.7 mm, yet LSA shows no correlation with any lateral offset measure, exposing a fundamental validity gap in the most widely used radiographic planning metric.

Key Takeaway: HIV-positive patients undergoing RA-TKA achieved equivalent 3-year KSS improvement (51.9 ± 15.3) and higher satisfaction (97.6% vs. 91.4%, P=0.021) compared to HIV-negative controls, with zero PJI or revisions in either group.

Key Takeaway: Triceps-sparing TEA yields a mean fixed flexion deformity of 12° versus 26° with triceps-detaching approach at 12 months (p<0.01), with no difference in patient-reported outcomes or component positioning.

Key Takeaway: Random Forest and XGBoost models predicted 1-year mortality with 73% accuracy and return-to-work with 78% accuracy in 14,900 primary TKA patients, with baseline KOOS Joint Replacement score, Area Deprivation Index, and race among the top predictors across outcomes.

Key Takeaway: Wearable-derived mobility metrics correlate strongly with disability PROMs after lumbar spine surgery (r=0.646), moderately with pain (r=0.459), and weakly with health-related quality of life (r=0.357).

Key Takeaway: Vitamin D supplementation improves one-year fusion rates by approximately 25% (RR ~1.25) over placebo, while bisphosphonates reduce vertebral compression fracture risk by 90% (RR 0.10) compared to vitamin D alone in spinal fusion patients.

Key Takeaway: In 111 patients undergoing lumbar spine surgery, MCID thresholds for objective gait recovery were established at 0.14 m/s for walking speed and 7.8 steps/min for cadence, providing the first quantitative benchmarks for motion-analysis-based outcome interpretation.

Key Takeaway: In 369 healthy scapulae, 6–13% exceeded published pathological morphological thresholds for posterior instability, anterior instability, or primary glenohumeral OA, with younger subjects (<60 years) paradoxically displaying more 'pathological' morphology than older subjects.

Key Takeaway: TAA demonstrated significantly lower total complication rates (13.1% vs 31.4%), adjacent joint fusion rates (5.1% vs 13.4%), and nonunion/ORIF rates (1.6% vs 7.2%) compared to ankle arthrodesis across 7,443 surgeries, with no difference in patient-reported outcomes.

Key Takeaway: Spin bias was present in 92.3% of systematic review abstracts comparing Bankart-remplissage to Latarjet, with 10 of 13 reviews rated critically low quality by AMSTAR-2.

Key Takeaway: Logistic regression ML outperformed ASA classification for predicting transfusion after ankle ORIF (AUC 93% vs. 82%) across 42,254 NSQIP cases.

Key Takeaway: The CJR bundled-payment model reduced 90-day episode spending by $469–$1,322 per THA/TKA episode primarily through reduced skilled-nursing facility utilization, but generated measurable racial and socioeconomic disparities in access.

Key Takeaway: Severely frail patients (mFI-5 ≥3) undergoing surgical ankle fracture fixation face a 5-year mortality rate of ~33% and a 7.9-fold increased risk of myocardial infarction within 90 days compared to nonfrail patients.

Key Takeaway: Global T4-L1PA mismatch (OR 1.10 per degree) independently predicts mechanical failure after ASD surgery, while achieving the ideal L1PA target does not.

Key Takeaway: TAA generates 7.17 wRVU/hour versus 13.84, 13.13, and 15.86 wRVU/hour for TKA, THA, and TSA respectively, despite requiring 135.69 minutes of operative time compared to roughly 92–97 minutes for the other three procedures.

Key Takeaway: Social deprivation risk factors increase 1-year pseudoarthrosis odds by 74% in single-level posterior lumbar instrumentation (OR 1.765) and 37% in 3–6 level constructs (OR 1.366), with long-term mechanical failure driven by social factors and short-term readmission driven by economic factors.

Key Takeaway: Non-tobacco nicotine users undergoing ankle ORIF had 2.36x higher 30-day infection risk and 1.95x higher 2-year nonunion risk compared to nicotine-independent controls after propensity matching (n=10,162).

Key Takeaway: Objective brace wear time was not associated with 1-year SRS-22r score (β = -0.029, p = 0.670), while early brace-related psychological stress independently predicted HRQOL (β = 0.217, p = 0.003) in AIS patients.

Key Takeaway: Ankle fracture fixation generates 10.37 wRVU/hr versus 21.66 for proximal hip and 11.39 for distal radius fixation, indicating ankle fixation is reimbursed at roughly half the rate of hip fracture surgery per operative hour.

Key Takeaway: Combined tendon remnant preservation and 1mm nanofracture bone marrow stimulation improved MRI-confirmed healing rate from 53.8% to 80.8% (p=0.039) without significant difference in clinical outcome scores.

Key Takeaway: Arthroscopic subtalar arthrodesis achieved faster time to fusion (10.5 vs 14 weeks) and shorter hospital stay (1.1 vs 2.2 days) compared to open arthrodesis, but union rates (93.6% vs 95.4%) and complication rates (39% vs 44%) were not significantly different across only 255 total cases.

Key Takeaway: Retrospectively determined radiographic time to union after tibial IMN overestimates predicted TTU by 34.2 days, with an IQR:median ratio of 0.9 indicating low accuracy.

Key Takeaway: Broström with InternalBrace augmentation produced a 7.13-point higher postoperative CAIT score versus non-augmented Broström after adjusting for baseline instability, with the greatest benefit in patients with preoperative CAIT ≤2 (25th percentile).

Key Takeaway: High-dose perioperative dexamethasone (>16 mg) was associated with a 21% reduction in 90-day VTE odds following TKA (aOR 0.79) and a 22% reduction following THA (aOR 0.78) compared to no dexamethasone.

Key Takeaway: Adding 3D-CT to standard radiographs and CT changed surgical approach, posterior fixation method, or fixation sequence in trimalleolar ankle fracture planning with interobserver agreement exceeding kappa 0.70 for those three domains.

Key Takeaway: Aspirin 81 mg once daily yielded an overall VTE rate of 1.1% at 90 days after primary TJA, statistically noninferior to twice-daily aspirin or potent anticoagulants across 8,073 cases.

Key Takeaway: MSB repair reduced overall complication risk by 70% compared to PARS (RR=0.30, 95% CI 0.10–0.87), though MSB carried significantly higher heel pain rates at final follow-up (8.6% vs. 1.9%, P=0.01).

Key Takeaway: In robotic-arm-assisted TKA, lateral change in posterior condylar offset correlated with 3-month KOOS JR improvement (r=0.179) and PROMIS Pain Interference reduction (r=-0.218), identifying PCO restoration and joint-line preservation as the dominant sagittal parameters driving early patient-reported recovery.

Key Takeaway: Revision TAA carries higher wRVU/hr (9.63 vs 7.57) and reimbursement rate ($311.65/hr vs $244.78/hr) than primary TAA, with comparable 30-day complication profiles except for a low-incidence cardiac arrest signal in the revision cohort (0.36% vs 0%).

Key Takeaway: Over 22 years, early-career orthopaedic oncologists' mean tumor case count during ABOS Part II collection declined by 6.1 cases per 5-year increment while fellowship positions nearly doubled and multifellowship training odds increased 1.4x per 5-year increment.

Key Takeaway: Arthroscopic ankle arthrodesis yields a significantly lower infection rate (1.1% vs 8.5%) and shorter hospital stay (3.3 vs 5.4 days) compared to open arthrodesis across 1,554 procedures.

Key Takeaway: In stable SCFE managed with in-situ pinning, each 1% increase in percent epiphyseal displacement (PED) predicts a 2.18° loss of flexion and 2.13° loss of abduction, making PED the strongest radiographic predictor of functional ROM deficit.

Key Takeaway: Under a standardized cementation protocol, cement viscosity did not independently predict revision for aseptic loosening (overall rate 0.43%) at 10 years, though medium-viscosity cement was associated with 3.14× higher odds of tibial radiolucent lines at one year.

Key Takeaway: THA in skeletally immature patients with open triradiate cartilage yields 92% implant survivorship and mean Harris Hip Score of 92 at mean 10-year follow-up.

Key Takeaway: MUA patients recover gait metrics within 5–10 days but carry significantly lower KOOS JR scores at 3, 6, and 12 months postoperatively compared to non-MUA stiff-knee controls.

Key Takeaway: Double-pin CC joint fixation during calcaneal lengthening osteotomy produced a significantly higher calcaneal pitch angle at 2 years compared to single-pin fixation (19.3° vs. 16.1°, P=0.019), though CC joint subluxation index did not differ between groups.

Key Takeaway: Revision THA for dislocation carries the highest 5-year re-revision rate (13%) and reoperation rate (15%), while revision for periprosthetic fracture carries the highest PJI risk (HR 1.43) and increased 90-day resource utilization.

Key Takeaway: Isolated meniscus repair in patients ≤19 years carries a 19.2% overall complication rate and 9.2% failure rate at 8 months, with female sex, medial posterior horn/body tears, lateral oblique/parrot-beak tears, and extreme ROM protocols (locked extension or no restriction) as independent risk factors.

Key Takeaway: Combined low BMI (<18.5) and hypoalbuminemia (<3.5 g/dL) increases 30-day mortality risk 7.09-fold and cardiac arrest risk 4.74-fold after primary THA compared to normal-weight normoalbuminemic patients.

Key Takeaway: SSI incidence after ORIF for bimalleolar ankle fractures was 3.1%, with peripheral vascular disease carrying the highest independent risk (OR 1.62).

Key Takeaway: Median time to SCB achievement (≥22-point HOOS JR increase) following primary THA was 80 days, with 83% of patients achieving SCB by one year.

Key Takeaway: In 12 patients with heel pad degloving injuries, 50% developed infections, 20% required below-knee amputation, and 5 of 7 limb-salvage patients had persistent pain at final follow-up.

Key Takeaway: Dual mobility constructs reduce all-cause re-revision risk by 6.9% at two years compared to fixed-bearing constructs when revising for dislocation (OR 2.04 for non-DM re-revision, p=0.009).

Key Takeaway: Fixed bearing TAA demonstrated statistically significantly higher metal component survival rates versus mobile bearing TAA across pooled data (n=7,952), with 15-year survival of 72.0% overall, though revision rates did not differ significantly between bearing types.

Key Takeaway: Trochanteric osteotomy during two-stage revision THA for PJI eliminated intraoperative periprosthetic femoral fractures (0% vs. 12.1% in non-osteotomy group, P=0.0059) without increasing blood loss or postoperative complication rates.

Key Takeaway: Tibialis anterior transfer to peroneus brevis achieved 88.7% success rate for dynamic supination after Ponseti treatment, with Laaveg-Ponseti scores improving to exclusively good or excellent at final follow-up (P<0.001).

Key Takeaway: In THA patients >120 kg, 3g cefazolin prophylaxis did not significantly reduce 90-day PJI compared to 2g (1.6% vs 1.4%; OR 1.16, 95% CI 0.43–3.07), though Bayesian analysis showed 87% probability of benefit with higher dosing.

Key Takeaway: Donor-recipient sex mismatch does not consistently affect OCA graft survival or functional outcomes across 973 patients, though one study reported a 21.2% vs. 6.9% failure rate favoring sex-matched grafts in male-donor-to-female-recipient cases.

Key Takeaway: Trauma-related PJI occurs at a median of 12 weeks versus 56 weeks post-arthroplasty, with significantly higher rates of Gram-negative (26.8% vs 8.6%), Enterococcus (19.5% vs 0.6%), and Candida (9.8% vs 1.2%) infections compared to elective PJI.

Key Takeaway: Concomitant osteotomy with cartilage restoration reduces failure rates to 0–10.5% compared to 0–41.7% for cartilage restoration alone across 1,783 knees.

Key Takeaway: Fixed-bearing UKA reduces revision risk by 35% (RR 0.65) and dislocation risk by 84% (RR 0.16) versus mobile-bearing UKA across 70,400 patients in a meta-analysis stratified by study design.

Key Takeaway: Among 1,553 Reddit posts on SI joint dysfunction, surgery and pain management categories showed the highest negative sentiment (24.7% and 25.8%, respectively), suggesting a gap between published PROMs and real-world patient satisfaction.

Key Takeaway: Early versus late ulnar epiphysiodesis for premature distal radius physeal arrest produced equivalent QuickDASH (6.7 vs 5.7) and SANE (90.4 vs 87.9) scores at mean 6.4-year follow-up, suggesting deformity correction matters more than timing.

Key Takeaway: Among 25 hips with pseudotumor-induced compression neuropathy, complete sciatic or peroneal neuropathy resulted in persistent foot drop in 4 of 5 cases despite revision THA and neurolysis.

Key Takeaway: Trampoline-related fractures carry a 2.02-fold higher risk of open fracture compared with other sports-related fractures (95% CI: 1.22–3.34), with fracture severity increasing with age across 1,153 cases.

Key Takeaway: BMAC achieves fusion rates comparable to autograft in select foot and ankle applications, yet neither BMAC nor PRP carries specific FDA approval as a therapeutic, operating instead through the Same Surgical Procedure Exemption or device-level regulation.

Key Takeaway: Custom pelvic implants (CPIs) demonstrate high midterm-to-long-term implant survivorship in complex acetabular reconstruction, with most failures attributable to infection or instability rather than mechanical loosening.

Key Takeaway: MIS calcaneal osteotomy showed a lower raw rate of minor wound complications versus open (3.8% vs 20.5%), but this difference lost significance after false discovery rate adjustment in a 70-patient cohort.

Key Takeaway: Posterior approaches to pilon fractures address posterior column shortening, malalignment, and articular comminution, but no high-quality comparative data exist to guide selection among the described techniques.

Key Takeaway: Intra-incisional (metaphyseal) pinning in robotic TKA produced 28.6% higher femoral torsional rigidity and reduced overall specimen fracture rate from 80% to 30% compared to extra-incisional (diaphyseal) pinning.

Key Takeaway: High-dose TNF-α resulted in 0/5 fusion rate versus 4/5 controls, while systemic Etanercept achieved 5/5 bilateral fusion by microCT at 4 weeks in a rat posterolateral fusion model.

Key Takeaway: A 3D DenseNet CNN trained on CT scans classified proximal humerus fractures with 78.6% accuracy (AUC 0.87–0.99) and characterized greater tuberosity displacement and varus malalignment at 80.3% and 87.2% accuracy respectively, matching or exceeding orthopedic surgeon performance on most metrics.

Key Takeaway: Finite element modeling shows inlay glenoid components distribute contact force across native bone (209.4N vs. 545.8N at the implant) and generate 15-fold lower von Mises stress on glenoid bone (0.63 MPa vs. 9.39 MPa) compared to onlay designs.