Abstract: Objective To evaluate the clinical value of dynamic fixation system and short segment decompression fusion and internal fixation in the treatment of degenerative scoliosis.
Methods The clinical data of 96 patients with degenerative scoliosis who underwent orthopaedic surgery in our hospital from March 2016 to July 2019 were analyzed retrospectively.48 patients in the control group were treated with short segment decompression fusion and internal fixation.48 patients in the observation group were treated with dynamic fixation system.The operation related situation，clinical symptom improvement，orthopedic effect，clinical curative effect and complications were observed and compared between the two groups.
Results Compared with the control group，the intraoperative blood loss，operation time，postoperative drainage volume and hospital stays in the observation group were significantly lower than those in the control group（P<0.05）.The incidence of perioperative complications decreased in the observation group（P<0.05）.Compared with that before operation，the VAS score and ODI index of the two groups were improved，and the observation group was significantly better than the control group at the last follow-up（P<0.05）.Compared with before operation，the Cobb angle of lumbar scoliosis in the two groups was significantly improved，and at the last follow-up，the observation group was significantly better than the control group（P<0.05）.Compared with the control group，the patients in the observation group had better range of motion of adjacent joints after operation and the total effective rate was significantly increased（P<0.05）.
Conclusion Compared with short segment decompression，fusion and internal fixation，dynamic fixation system has the advantages of less bleeding，shorter operation time and less postoperative drainage in the treatment of degenerative scoliosis，and has more advantages in the improvement of clinical symptoms and orthopedic effect.The clinical curative effect is remarkable，at the same time can significantly reduce the risk of complications.

Key words: dynamic stabilization system, short segment decompression and fusion, degenerative scoliosis