Reconstruction of volar plate avulsion injury of proximal interphalangeal joint with mini-anchor

Abstract

Objective To investigate the clinical efficacy of mini-bone anchor in the treatment of volar plate avulsion injury of proximal interphalangeal joint. Methods From June 2015 to May 2018, 5 patients with dorsal dislocation of proximal interphalangeal joint caused by finger hyperextension injury were treated. The volar plate avulsion accompanied by articular surface avulsion fracture at the base of middle phalanx occurred. The volar approach was used to remove fragments and reconstruct the insertion of volar plate avulsion with mini-anchor. Results All the wounds achieved primary healing. The follow-up period ranged from 4 to 26 months with an average of 12 months. The flexion and extension of the proximal interphalangeal joint ranged from 50° to 85°. The joint was stable and had no lateral abnormal movement. There was no obvious pain and discomfort during the joint movement. According to the upper extremity functional evaluation criteria issued by the Hand Surgery Society of the Chinese Medical Association, the results were excellent in 2 cases and good in 3 cases. Conclusion The reconstruction of volar plate insertion with mini-bone anchor can provide the initial stability of the proximal interphalangeal joint, help early functional exercise, and help to reconstruct the basal articular surface of the middle phalanx. It is one of the ideal choices for the treatment of volar plate avulsion injury of proximal interphalangeal joint. Key words: Volar plate; Treatment outcome; Proximal interphalangeal joint; Mini-anchor