关键词: 掌骨, 　骨折, 　克氏针, 　骨水泥, 　手损伤

Abstract: Objective　To investigate the curative effect of percutaneous Kirschner wires external fixation combined with bone cements fixation in the treatment of the fifth metacarpal neck fracture. 　Methods　From June 2017 to January 2019, patients with the fifth metacarpal neck fracture were treated with percutaneous Kirschner wires external fixation combined with bone cements, including 11 males and 2 females, with an average age of 32.6 years old (ranged 20-43 years). The causes of fracture were heavy pound injury in 4 cases, fall injury in 4 cases and clenched fist hammer in 5 cases. The time from injury to being operation was 3 hours less than 5 days, with an average of 9.8 hours. According to the AO classification of fractures, there were 5 cases of B1 type, 4 cases of B2 type, 3 cases of B3 type and 1 case of C1 type.　Results　All the patients were followed up for 6 to 14 months, with an average of 8.4 months. 1 patient was loosened with external fixation. Bone union was achieved in all the patients, and the healing time ranged from 9 to 13 weeks, with an average of 11.2 weeks. One of the patient was accidently injured again 10 weeks after the operation and the external fixation became loose. When the fracture healing examination was well, Kirschner wires was removed immediately. At the last follow-up, there was no significant difference in the range of motion between the metacarpophalangeal joint and the contralateral metacarpophalangeal joint. There was no collapse deformity of the fifth metacarpal bone and no rotation deformity of the little finger.　Conclusions　The treatment of the fifth metacarpal neck fracture with percutaneous Kirschner wires external fixation combined with bone cements fixation has the advantages of less trauma, simple operation and early movement of metacarpophalangeal joint, and the curative effect is definite.

Key words: Metacarpal bones, 　Fracture, 　Kirschner wires, 　Bone cements, 　Hand injuries