title: Short-term effects of a dynamic neutralization system (Dynesys) for multi-segmental lumbar disc herniation.
abstract: To determine the safety and short-term curative effects of internal fixation using a dynamic neutralization system (Dynesys) for multi-segmental lumbar disc herniation (ms-LDH) with the control group treated by posterior lumbar interbody fusion (PLIF).
  
  
  
  Forty-five patients with ms-LDH were selected as study group treated with Dynesys and 40 patients as control group with PLIF. The surgical efficacy was evaluated by comparing the visual analogue scale (VAS) scores, the Oswestry Disability Index (ODI) scores and the ROMs of the adjacent segment before and after surgery. The postoperative complications related to the implants were identified.
  
  
  
  All patients were followed up for an average duration of over 30 months. Dynesys stabilization resulted in significantly higher preservation of motion at the index level (p < 0.001), and significantly less (p < 0.05) hypermobility at the adjacent segments. VAS for back and leg pain and ODI improved significantly (p < 0.05) with both the methods, but there was no significant difference between the groups.
  
  
  
  The non-fusion fixation system Dynesys is safe and effective regarding short-term curative effects for the treatment of ms-LDH.
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Yu
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Junxiong
authors.initials: J
authors.lastname: Ma
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Weijian
authors.initials: W
authors.lastname: Ren
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Huifeng
authors.initials: H
authors.lastname: Yang
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, The General Hospital of Shenyang Military Commanding Area, No 83, Wenhua Road, 110840, Shenyang, China. xiangliangbi1963@sina.com.
authors.forename: Liangbi
authors.initials: L
authors.lastname: Xiang
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000601:surgery*; D017116:Low Back Pain; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D013123:Spinal Fusion / Q000379:methods / Q000706:statistics & numerical data
keywords: Dynamic neutralization system (Dynesys); Multi-segmental lumbar disc herniation (ms-LDH); Non-fusion; Posterior lumbar interbody fusion (PLIF)