Locking plate fixation for treatment of coronoid process fractures

Abstract

Objective To evaluate the clinical outcomes of locking plate fixation for coronoid process fractures. Methods Thirteen patients with a coronoid process fracture were included in the study. According to O'Driscoll classification, there were five type -Ⅰ fractures, six type -Ⅱ fractures and two Type-Ⅲ fractures. Locking plate fixation via a medial approach in 8 cases and a posterior approach in 5 cases were performed within four days of the injury. Clinical, radiographic, and the Mayo Elbow Performance Score (MEPS) evaluations were conducted postoperatively. Results The follow-up time ranged from 24 to 31 months, with a mean of 27.2 months. All fractures healed at an average of 9.6 weeks (range, 8 to 14 weeks). The mean MEPS was 89.2 points (range, 75 to 100). Average range of motion was 118.8° for flexion-extension and 141.9° for pronation-supination. According to the Broberg-Morrey criteria, the signs of posttraumatic arthritis were observed in 4 patients, including 3 cases of grade 1 and 1 case of grade 2. No patient reported pain or had any subjective complaints consistent with elbow instability. Conclusion Locking plate fixation for coronoid process fracture followed by early rehabilitation can lead to functional range of motion and satisfactory outcomes. Key words: Ulna fractures; Fracture fixation, internal; Coronoid process; Locking plate