title: Radiographic study of iliac screw passages.
abstract: BACKGROUND
  The optimal iliac screw path was determined to provide references for lumbosacral-pelvic reconstruction.
  
  
  METHODS
  Radiographic data of 100 patients with normal pelvis were selected for this study. Four paths were designed. Paths A, B, and C were from the starting point of the crossing point of the chiotic line and posterior iliac crest (CLIC, located at 24.0 mm above the posterior superior iliac spine) to the upper edge of the acetabulum, anterior inferior iliac spine, and acetabulum center, respectively. Path D was from the starting point of the posterior superior iliac spine to the anterior inferior iliac spine. The lengths of the different paths of screw passage and bone plate thicknesses of two narrow places were measured and analyzed.
  
  
  RESULTS
  Paths A, B, and D were approximately equal in length, but the thickness of the iliac plate in path A was significantly thicker than those in paths B and D. No significant difference was found between the iliac thickness of paths A and C, but the passage length of path A was significantly longer than that of path C.
  
  
  CONCLUSIONS
  Path A had the longest passage length and thickest iliac plate and could accommodate the relatively longest and thickest iliac screw. Thus, path A was the optimal iliac screw passage.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.affiliation: Department of Orthopaedics, Sixth Affiliated Hospital of Wenzhou Medical University, Lishui 323000, Zhejiang Province, China. jiweiwang@163.com.
authors.forename: Jiwei
authors.initials: J
authors.lastname: Wang
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Gan
mesh_terms: D000328:Adult; D000368:Aged; D001863:Bone Screws / Q000592:standards*; D005260:Female; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods / Q000592:standards*