Application of mini hook plate in the treatment of acute ulnar avulsion fracture at the base of proximal phalanx of thumb

Abstract

Objective \nTo evaluate the clinical outcomes of mini hook plate in the treatment of acute ulnar avulsion fracture at the base of proximal phalanx of thumb. \n \n \nMethods \nFrom February 2015 to February 2016, 20 cases of acute ulnar avulsion fracture at the base of proximal phalanx of thumb were treated by open reduction and mini hook plate fixation to correct the fracture deformity and reconstruct the collateral ligament attachment. \n \n \nResults \nAll the patients were follow-up for 6 to 24 months with an average of 16.2 months. The time of fracture healing ranged from 4 to 7 weeks, averaging 5.2 weeks. According to Saetta functional assessment standard, the results were graded as excellent in 14 cases, good in 5 cases, and fair in 1 case. X-rays showed the line of avulsion fracture disappeared. \n \n \nConclusion \nApplication of mini hook plate in the treatment of acute ulnar avulsion fracture at the base of proximal phalanx of thumb can achieve strong fixation and lead to satisfactory postoperative function recovery of the first metacarpophalangeal joint. The clinical outcomes are reliable. \n \n \nKey words: \nFinger phalanges;\xa0Fracture fixation, internal;\xa0Metacarpophalangeal joint;\xa0Mini plate