To determine the effectiveness of 2.7mm plates in treating both bone forearm fractures (BBFFs) compared to the current gold standard of 3.5mm fixation. More specifically, to determine if 2.7mm plates are non-inferior to the current standard of 3.5mm plates. Retrospective including patients from 2016-2021. Single institution, level-1 trauma academic medical center. 77 patients met inclusion criteria, 58 patients underwent fixation with 3.5mm plates and 19 underwent fixation with 2.7mm plates. Plate osteosynthesis with either 2.7mm or 3.5mm plate instrumentation. Maintenance of reduction and achievement of fracture union. Among 77 total patients, 19 received 2.7mm plates and 58 received 3.5mm plates. There was no difference in age and BMI between groups, but the 2.7mm group had fewer males (47% vs 79%, p = 0.02). Primary end points of achievement of union (89.5% vs. 79.3%, p = 0.39) and maintenance of reduction (100% vs. 94.8%, p = 0.99), and secondary end points of implant removal (15.8% vs. 13.8%, p = 0.79), return to the operating room (OR) (5.3% vs. 5.2%, p = 0.63), and minor complications (0% vs. 6.9%, p = 0.99) were similar between the 2.7mm and 3.5mm groups. This study challenges the current standard of ORIF using 3.5mm plates for diaphyseal forearm fractures. 2.7mm plating resulted in at least equivocal achievement of fracture union and thus may be more efficacious given previous studies showing lower refracture risks after implant removal. Level III, retrospective cohort study.
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