title: [Biomechanical analysis and classification of lumbosacral spondylolisthesis].
abstract: OBJECTIVE
  To review the research progress of the risk factors for slip progression and the pathogenesis of lumbosacral spondylolisthesis, and to discuss the value of Spinal Deformity Study Group (SDSG) classification system for lumbosacral spondylolisthesis.
  
  
  METHODS
  Recent articles about the risk factors for slip progression and the pathogenesis of lumbosacral spondylolisthesis were reviewed and comprehensively analyzed with SDSG classification system of lumbosacral spondylolisthesis.
  
  
  RESULTS
  Pelvic incidence (PI) is the key pathogenic factor oflumbosacral spondylolisthesis. The Meyerding grade of slip, PI, sacro-pelvic balance, and spino-pelvic balance not only are the fundamental risk factors of slip progression, but also are the key factors to determine how to treat and influence the prognosis. Therefore, compared with Wiltse, Marchetti-Bartolozzi, and Mac-Thiong-Labelle classification systems oflumbosacral spondylolisthesis, SDSG classification based on these factors mentioned above, has better homogeneity between the subjects of subgroup, and better reliability, moreover, could better guide operative plan and judge the prognosis.
  
  
  CONCLUSIONS
  It is suggested that the SDSG classification system should be the standard classification for lumbosacral spondylolisthesis for the clinical and research work.
authors.affiliation: Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Gong
authors.forename: Qingquan
authors.initials: Q
authors.lastname: Kong
mesh_terms: D000886:Anthropometry / Q000379:methods; D001696:Biomechanical Phenomena; D018450:Disease Progression; D006801:Humans; D008161:Lumbosacral Region; D010388:Pelvis / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D004856:Postural Balance / Q000502:physiology*; D011379:Prognosis; D011859:Radiography; D012307:Risk Factors; D012720:Severity of Illness Index; D013131:Spine / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D013168:Spondylolisthesis / Q000145:classification* / Q000000981:diagnostic imaging / Q000503:physiopathology*