title: Traumatic spondyloptosis of L4.
abstract: METHODS
  Case report of 2 patients with traumatic L4-L5 spondyloptosis.
  
  
  OBJECTIVE
  To report the diagnosis and treatment of the traumatic L4-L5 spondyloptosis.
  
  
  BACKGROUND
  Traumatic L4-L5 spondylolisthesis is even rarer than traumatic L5-S1 spondylolisthesis. No case of traumatic L4-L5 spondyloptosis (anterolisthesis of Grade V) has been reported. The injury mechanism and surgery management merit more studies.
  
  
  METHODS
  Through the posterior approach, both of the 2 patients underwent the decompression and reduction with pedicle screws. One had the posterolateral fusion and the interbody fusion from L4-L5 whereas the other had the posterolateral fusion from L4-S1.
  
  
  RESULTS
  Complete reduction and fusion were achieved. The neurologic symptoms improved after the surgery. At follow-ups of 1 year and 6.5 years, there was no further slippage of the vertebrae. They were satisfied with the treatment outcomes.
  
  
  CONCLUSIONS
  Posterior decompression, reduction, internal fixation, and fusion is effective and dependable for traumatic L4-L5 spondyloptosis.
authors.affiliation: Department of Orthopedics, Kunming General Hospital, Third Military Medical University, Kunming, Yunnan, China.
authors.forename: Tian-Hua
authors.initials: TH
authors.lastname: Zhou
authors.forename: Xun
authors.initials: X
authors.lastname: Tang
authors.forename: Yong-Qing
authors.initials: YQ
authors.lastname: Xu
authors.forename: Yue-Liang
authors.initials: YL
authors.lastname: Zhu
mesh_terms: D000293:Adolescent; D019299:Decompression, Surgical; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D011859:Radiography; D013123:Spinal Fusion; D013168:Spondylolisthesis / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult