cases with spondylotisthesis were treated with RF system. The types of spondylotisthesis were investigated and result was analysed. The results : follow up of an average of 5 years showed obvious relief of the symptoms. It suggested that RF system has the advantages of high reduction rate restoration of the intervertebral height and lumbo sacral physiological curvature and easy manipulation.

42cases with spondylotisthesis were treated with RF system. The types of spondylotisthesis were investigated and result was analysed. The results : follow-up of an average of 5 years showed obvious relief of the symptoms. It suggested that RF system has the advantages of high reduction rate restoration of the intervertebral height and lumbo-sacral physiological curvature and easy manipulation.