Dual Plate Fixation of Mason Type III and IV Radial Neck Fractures: a Mid-term Follow-up of 9 Cases

Abstract Background: Radial head and neck fractures commonly occur in elbow injuries. The purpose of the present study was to evaluate the effectiveness of the dual plate fixation technique for fractures of the radial neck. Methods: This prospective study included 9 patients who were referred to our department by trauma surgeons between July 2014 and March 2018. 8 patients had a Mason type III fracture, and 1 patient had a Mason type IV fracture. The functional outcomes of dual plate fixation were evaluated via the range of motion (ROM) of the elbow joint, Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire, Mayo Elbow Performance Index (MEPI), and the Broberg and Morrey Index. Radiographic images were also reviewed during follow-up. Results: After a mean follow-up period of 50 months (24–69), the mean elbow flexion was 134°, extension was 5°, pronation was 76°, and the mean supination was 78°. The mean DASH score was 6.3. The mean MEPI was 97, and the mean Broberg and Morrey Index was 97. At the time of the last follow-up, the average humeroradial joint space was 2.5 mm, and the average inclination of the radial head relative to the neck was 2.2°. There were no incidences of wound infection, delayed union, nonunion of the fracture, or secondary displacement. Conclusions: Mason type III–IV radial neck fractures can be fixed using the dual plate technique with sufficient midterm results for both fractures that involve the radial head and those that do not. Trial registration: 2020-KY-096(K)