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Anatomic descriptions of location, dimensions, and variability in the position and surface area of the ligament attachment sites and of orientation of the bundles provide information for future attempts at repair or reconstruction of the Lisfranc ligament.

Introduction: Following closed reduction and initial casting of pediatric forearm fractures, loss of reduction (LOR) occurs in ∼5% to 75% of fractures. Sugar-tong splinting has been shown to maintain acceptable reduction in pediatric distal radius fractures while potentially avoiding issues associated with circumferential casting. We hypothesized that the sugar-tong splint would be an acceptable method for initial immobilization to prevent LOR in distal, mid-shaft, and proximal pediatric forearm fractures. Methods: This is an IRB-approved, retrospective study. Inclusion criteria included pediatric patients age 4 to 16 years old, open growth plates, with a displaced forearm fracture (radius, ulna, or both bone) that underwent closed reduction. The clinical protocol involved closed reduction and application of a sugar-tong splint by an orthopaedic resident under conscious sedation in the emergency room. Clinical follow-up occurred at 1, 2, 4, and 6-week intervals with a long-arm cast overwrap applied at the initial clinic visit. Primary outcome was radiographic LOR which was defined as a change of >10 degrees of angulation on anterior posterior/lateral projections from initial postreduction radiograph or previous follow-up radiograph. The secondary outcome was the need for further intervention. Results: Sixty-four (38%) patients demonstrated radiographic LOR with 90% of LORs occurring in the first 2 weeks. LOR was significantly more common in distal radius fractures [48/110 (44%)] than with either proximal [2/14 (14%), P=0.04] or mid-shaft radius fractures [7/41 (17%), P=0.004]. There was no difference in LOR by location for ulna fractures [proximal=2/13 (15%), middle=4/38 (11%), distal=20/77 (26%), P>0.08]. There was no difference in radial LOR in patients with isolated radius fractures compared with both bone forearm fracture (17/40 vs. 40/125, P=0.22), or ulnar LOR between isolated ulna and both bone forearm fracture (0/3 vs. 26/125, P>0.99). Conclusion: The sugar-tong splint is effective at maintaining reduction of pediatric forearm fractures similar to published rates for casting. While effective at all levels of the forearm, the sugar-tong splint performed best in proximal and mid-shaft forearm fractures. Level of Evidence: Level IV.

The findings of this study may indicate the most optimal area for implant purchase in the medial cuneiform when reducing the diastasis between the base of the second metatarsal and medial cuneiform and for stabilization of the medial column.

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