Objective To observe the effect of modified anchor technique in the repair of avulsion injury of lateral collateral ligament of elbow joint.

Methods From January 2016 to September 2021, the clinical materials of 20 patients with modified anchor technique for repair of avulsion injury of lateral collateral ligament of elbow joint were analyzed retrospectively. The injury type of 20 patients was closed injury, including 8 cases of radius fractures, 1 case of ulna fractures, 5 cases of ulna and radius fractures, 3 cases of humerus fractures, 2 cases of humerus and ulna and radius fractures, and 1 case of simple ligament injury. The repair effect of the modified anchor technique was evaluated.

Results All the patients achieved primary wound healing after operation, and they were followed up for 6 to 26 months, with an averageof 11.9 months. CT result showed that the anchors were all in place and there was no nail detachment. At the last follow-up, the range of joint pronation was 58° to 90°, the range of joint supination was 40° to 65°, and with an average rotation range of 123.2°; the range of flexion was 90° to 130°, the range of extension was 0 to 13°, and with an average motion range of 115.6°. The lateral stress test was negative, the fracture was not displaced, no looseness or fracture of internal fixation were observed, and there were no complications such as ectopic ossification. Mayo elbow function score was excellent in 16 cases and good in 4 cases.

Conclusion Modified anchor technique is reliable in the repair of avulsion injury of lateral collateral ligament of elbow joint, which ensures the strong stability of the elbow joint through double compression fixation, and at the same time, the occurrence of nail detachment is also avoided.