TY - JOUR T1 - Outcomes Following Distal Humeral Fracture Fixation with an Extensor Mechanism-On Approach AU - Erpelding, Jason M. AU - Mailander, Adam AU - High, Robin AU - Mormino, Matthew A. AU - Fehringer, Edward V. Y1 - 2012/03/21 N1 - 10.2106/JBJS.J.01785 JO - The Journal of Bone & Joint Surgery SP - 548 EP - 553 VL - 94 IS - 6 N2 - Background:  Distal humeral fractures have traditionally been managed with surgical approaches that disrupt the extensor mechanism. We hypothesized that an extensor mechanism-on approach for operative fixation of distal humeral fractures with parallel or orthogonal plate constructs would allow excellent healing, a motion arc of the elbow exceeding 100°, and maintenance of extensor mechanism strength.Methods:  Distal humeral open reduction and internal fixation (ORIF) was performed with either orthogonal or parallel plate constructs in seventy-nine elbows. Thirty-seven elbows were fixed via an extensor mechanism-on surgical approach, and twenty-four of them were available for additional evaluation. Radiographs as well as MEPI (Mayo Elbow Performance Index), DASH (Disabilities of the Arm, Shoulder and Hand), and SF-36 (Short Form-36) scores were obtained.Results:  All thirty-seven fractures healed primarily. Three elbows underwent later release because of stiffness. The median arc of elbow motion was 126° (range, 60° to 141°). The mean MEPI was 91.5 points and the mean DASH score was 15.9 points, indicating excellent scores with mild impairment. The median percent loss of triceps strength was 10% (range, 0% to 49%) compared with the contralateral, normal elbow.Conclusions:  Open treatment of distal humeral fractures with an extensor mechanism-on approach results in excellent healing, a mean elbow flexion-extension arc exceeding 100°, and maintenance of 90% of elbow extension strength compared with that of the contralateral, normal elbow.Level of Evidence:  Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence. SN - 0021-9355 M3 - doi: 10.2106/JBJS.J.01785 UR - http://dx.doi.org/10.2106/JBJS.J.01785 ER -