title: Sacral and lumbar-pelvic morphology in high-grade spondylolisthesis.
abstract: Numerous authors have stressed the importance of posterior arch, vertebral bodies, and intervertebral disk dysplastic changes in lumbosacral spondylolisthesis. An extensive morphologic analysis was conducted of the lumbosacral junction in a series of 100 consecutive patients presenting with severe lumbosacral spondylolisthesis. Statistical correlations were found between the pelvic incidence, sacral slope, and pelvic tilt, as found in healthy volunteers. A statistical relationship exists between the lumbosacral kyphosis and pelvic parameters that explains the global sagittal "balance" of this pathological posture. A well-defined morphological criterion, the "S1 index," strongly correlated with the severity and stiffness of lumbosacral spondylolisthesis.
authors.affiliation: Department of Orthopedic Surgery, Hôpital Beaujon, Clichy, France.
authors.forename: Raphaël
authors.initials: R
authors.lastname: Vialle
authors.forename: Cyril
authors.initials: C
authors.lastname: Dauzac
authors.forename: Nejib
authors.initials: N
authors.lastname: Khouri
authors.forename: Philippe
authors.initials: P
authors.lastname: Wicart
authors.forename: Christophe
authors.initials: C
authors.lastname: Glorion
authors.forename: Pierre
authors.initials: P
authors.lastname: Guigui
mesh_terms: D000293:Adolescent; D000328:Adult; D001837:Body Weights and Measures; D002648:Child; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D008297:Male; D010388:Pelvis / Q000000981:diagnostic imaging; D011859:Radiography; D015203:Reproducibility of Results; D012447:Sacrum / Q000000981:diagnostic imaging; D013168:Spondylolisthesis / Q000000981:diagnostic imaging*