Recent multicenter orthopaedic studies

New multicenter evidence from the weekly pipeline — hottest first.

4 papers· updated weekly · ranked by rigour & impact

Spine · IF 2.6 · Jul 20, 2026 · LoE II

HEAT

Complication Profiles of Corpectomy-Containing Versus Non-Corpectomy Anterior Cervical Surgery for Degenerative Cervical Myelopathy

This retrospective study from three Japanese spine centers compared complication rates between 407 patients who had corpectomy-containing anterior cervical surgery (ACCF or hybrid ACDF/ACCF) and 617 patients who had non-corpectomy anterior surgery (mostly ACDF) for degenerative cervical myelopathy. Corpectomy patients had far more perioperative local complications (38.1% vs 16.5%), dural injury (17.4% vs 1.5%), reoperation (9.8% vs 2.4%), and upper-extremity weakness (13.0% vs 4.2%), but after adjusting for how many levels were operated and whether the upper cervical spine was involved, the extra risk from corpectomy itself largely disappeared (adjusted OR fell from 1.82 to 1.12, no longer significant). The authors conclude that much of the added morbidity reflects the underlying OPLL pathology and greater surgical extent rather than corpectomy as a technique per se.

AI summary · from the full text

Why it mattersHelps residents and spine surgeons frame corpectomy's higher complication burden as a marker of surgical complexity and OPLL severity rather than an independent reason to avoid the procedure, which matters for informed consent and case selection.

MulticenterSpinen = 1,024DOI ↗

Rigor

Impact

Patient-important outcome and fragility index 96, offset by no power calculation.

Presenting this at rounds? Start here

?Because the choice between corpectomy and non-corpectomy surgery was driven by pathology severity and surgeon judgment rather than randomization, how confident can we be that adjusting for operated levels and upper cervical involvement fully removes confounding by indication, especially since important variables like canal-occupying ratio, K-line status, and dural ossification were not modeled?
?When counseling a patient with massive, dura-adherent OPLL who may need corpectomy for adequate decompression, how should this data on higher dural injury, reoperation, and airway complication rates be weighed against the potential neurological benefit of more complete anterior decompression?

Spine · IF 2.6 · Jul 20, 2026 · LoE II

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Laminoplasty Associated With a Lower Risk of Reoperation Compared to Laminectomy/Fusion for Multilevel Posterior Cervical Spine Surgery

This retrospective registry-based cohort study followed 4,412 adults who had multilevel posterior cervical spine surgery (2009-2023) at a large US integrated health system, comparing laminoplasty (PCL, 29.3%) to laminectomy with fusion (PLF, 70.7%). After adjusting for patient and surgical factors, PCL was associated with a lower risk of reoperation for adjacent segment disease (hazard ratio 0.42) and lower all-cause reoperation (hazard ratio 0.51) over a median 4.7 years of follow-up, with no difference in mortality, 90-day ED visits, or readmissions.

AI summary · from the full text

Why it mattersThis large, long-term comparison adds weight to the argument that laminoplasty should be considered more often than laminectomy/fusion for multilevel cervical spondylotic myelopathy, a debate residents will encounter on spine rotations and boards.

MulticenterSpinen = 50DOI ↗

Rigor

Impact

Patient-important outcome and 56.4-month follow-up, offset by no power calculation and no correction for multiple comparisons.

Presenting this at rounds? Start here

?Given the significant baseline imbalances in myelopathy diagnosis, spondylolisthesis, number of levels, and operative time between groups, how confident can we be that multivariable adjustment fully accounts for confounding by indication in choosing PCL versus PLF?
?If you were counseling a patient with multilevel cervical myelopathy and preserved sagittal alignment, would this study's reoperation data alone be enough to favor laminoplasty over laminectomy/fusion, or would you want patient-reported outcome and alignment data before changing your usual approach?

Spine · IF 2.6 · Jul 20, 2026 · LoE II

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Natural Progression Patterns of Lumbar Spondylolysis and Low-grade Spondylolisthesis in Late Adolescents

This multicenter study followed 154 skeletally mature adolescents with bilateral pars defects or low-grade spondylolisthesis for a median of 10.5 years to see how the condition behaves after growth stops. Vertebral slip itself rarely worsened (7.1%), but MRI-detected disc degeneration progressed in 30.5%, low back pain worsened in 44.2%, and new neurologic symptoms appeared in 4.5%, so that 56.5% of patients showed progression in at least one domain; L5-level disease, paraspinal sarcopenia, and sedentary behavior independently predicted this overall progression.

AI summary · from the full text

Why it mattersIt challenges the long-standing teaching that spondylolysis and low-grade spondylolisthesis become mechanically 'burned out' after skeletal maturity, suggesting these patients still need longitudinal monitoring for disc degeneration and pain rather than reassurance based on stable slip alone.

MulticenterSpinen = 154DOI ↗

Rigor

Impact

Contradicts current practice and 126-month follow-up, offset by no power calculation and no comparator.

Presenting this at rounds? Start here

?The study had no healthy control group and relied on retrospective extraction of symptom data from questionnaires and records; how might recall bias and the absence of a comparator affect confidence in the 44.2% LBP progression rate and the identified risk factors?
?If vertebral slip itself rarely progresses but disc degeneration and pain commonly do, should adolescent spondylolysis follow-up protocols shift emphasis away from serial radiographs toward symptom tracking and MRI surveillance, especially in patients with L5-level disease, sarcopenia, or sedentary lifestyles?

JAMA Network Open · IF 10.5 · Jul 24, 2026 · LoE II

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Glucagon-Like Peptide-1 Receptor Agonists and Fragility Fracture Risk in Type 2 Diabetes

This retrospective database study used TriNetX electronic health records to compare fragility fracture risk in about 133,600 propensity-matched adults with type 2 diabetes who started a GLP-1 receptor agonist versus a DPP-4 inhibitor. Over 3 years, fragility fractures occurred in 2,030 GLP-1 RA users versus 2,484 DPP-4i users, corresponding to a 21% lower relative risk (HR 0.79) that appeared independent of weight loss or glucose control, though the effect weakened by year 3 and was not seen in patients without diabetes.

AI summary · from the full text

Why it mattersOrthopaedic surgeons are increasingly seeing patients on GLP-1 RAs and need to know whether these drugs raise or lower fragility fracture risk, especially since weight loss itself is a known risk factor.

MulticenterSpinen = 133,606DOI ↗

Rigor

Impact

Contradicts current practice and patient-important outcome, offset by only 36 months of follow-up and more patients lost than the result can absorb.

Presenting this at rounds? Start here

?Given this is a retrospective, non-randomized comparison using administrative EHR data with unmeasured confounders like physical activity, fall risk, and baseline bone mineral density, how much can propensity-score matching really substitute for randomization here?
?If you were counseling a patient with T2D and osteopenia who is starting a GLP-1 RA, would this study change how you approach bone health monitoring, and why or why not?