OBJECTIVETo review a group of clinical data of pedicle screw implantation in the treatment of middle-upper thoracic fracture and dislocation and explore these clinical effect.

METHODSThrough the retrospective analysis of 23 patients (31 vertebraes) of middle-upper thoracic fracture and dislocation included 21 male and 2 female,aged from 20 to 47 years in average of 33.5 years. The location and type of fractures were as follows: 2 in T2, 2 in T3, 5 in T4, 6 in T5, 10 in T6, 4 in T7, 2 in T8. Three cases were compression fractures, 7 burst fractures, 9 fracture-dislocations, 4 burst-dislocations.

RESULTSAfter a followed-up from 3 to 48 months, average 25.5 months, all cases had no serious complications. Anterior height of affected vertebral bodies had been restored from 40.4% to 90.3% after operation. Patients with incomplete spinal cord injuries improved one to two grades according to ASIA grade of spinal cord injury. Patients with complete spinal cord injuries improved 21.7 scores on average according to Sensory and Motion Scores.

CONCLUSIONMulti-segmental pedicle screw implantation for the injuries of vertebral body may get satisfactory reduction and fixation effects, and prevent the long-term loss of the vertebral body height and implanting failure.