Treatment of vertebrae spondylolisthesis with RF device fixation and column autografting for intervertebral fusion

Objective:Assessment of the efficacy of intervertebral fusion with RF pedicle screw system and column autografting for the treatment of vertebrae spondylolisthesis.Method:23 cases of vertebrae spondylolisthesis were treated with the methods as following:(1)Directive decompression towards to the compressed lesion area to relieve the compression factors.(2)Reduction and fixation for slipped vertebrae with RF device to restore the normal anatomical curve of the vertebra.(3)Anterior intervertebral fusion was performed by implanting column autograft bones which were taken from the posterior part of the ilium of the patients.Result:The cases were followed up from 6 months to 5 years and 8 months,with an average of 3 years and 6 months.The patients had satisfactory pain relieve.The reduction rate was from 80 to 100 persent with no loss of correction in all patients.The solid fusion was observed in 4 months after the operation.There was no pedicle screw loosening or broken in this series.Conclusion:This method can prevent RF pedicle screws from loosening,or being broken and prevent the correction from being deteriorated.