• Cheng Liang, Chun-Yan Li, Xiao-Shuai Qin, Guan Wang, Ke Duan, and Xiao-Bo Lu.
• Department of Orthopedics, The Affiliated Hospital of Southwest Medical University, LuZhou, China; Sichuan Provincial Laboratory of Orthopaedic Engineering, LuZhou, China; The Clinical Medicine Research Center, The Affiliated Hospital of Southwest Medical University, LuZhou, China.
• Injury. 2023 Apr 1; 54 Suppl 2: S95S100S95-S100.

BackgroundIn the treatment of transverse olecranon fractures, complicated tension band wiring (TBW) has high rates of re-operations. Besides, plate fixation (PF) and TBW both have large surgical incisions and soft-tissue irritation. Therefore, the new cross-locking intramedullary nail (CIN) with easy handling and minimally invasive features is significantly advantageous. The goal of this study was to biomechanically compare CIN with TBW for fixing transverse olecranon fracture.MethodsThe transverse olecranon fracture models were created with 15 fresh-frozen cadaveric ulnae which were randomly divided into 3 groups: one group for TBW fixation, another for CIN fixation with 1 conical locking screw (CIN-1), and the last for CIN fixation with 3 conical locking screws (CIN-3). The stiffness, cyclic stability, and failure strength of the fixed fracture models were compared after the corresponding experimental tests.ResultsThe failure strength of TBW, CIN-1 and CIN-3 were (313.38±27.68) N, (528.56±53.58) N and (871.04±94.95) N. There was a significant difference between them. However, as for dynamic stability and stiffness, CIN-3 was higher and TBW was lower, with no significant differences between the groups.ConclusionThe biomechanical properties of CIN were superior to those of TBW, and CIN was more stable and solid for fixing transverse olecranon fracture, of which CIN-3 was the strongest.Copyright © 2022. Published by Elsevier Ltd.

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