title: Axial view of acetabular anterior column: a new X-ray projection of percutaneous screw placement.
abstract: BACKGROUND
  To search for a new radiographic view/projection of the acetabular anterior column to provide a safe guide for percutaneous screw placement for acetabular fractures.
  
  
  METHODS
  Eight pelvic specimens taken from normal adult cadavers were positioned in a supine position on the operating table. First, the ipsilateral ilium-oblique view of the observed side was obtained on C-arm fluoroscopy by tilting the C-arm approximately 35° toward the contralateral hip joint. Then, the tilting angle of the C-arm was changed gradually until an oval track image (acetabular anterior column axial view) appeared. The oval shadow was clear only in one position as the angle of the C-arm was changed toward the caudal side of the operating table. A guide pin was put on the skin of the cadaver, and the location and tilting direction of the guide pin were adjusted under C-arm fluoroscopy until the pin's shadow became a point in the center of the oval track. Then, the guide pin was inserted into the bone using a battery-powered drill. The degree of inclination of the guide pin in the cadaver in the frontal and sagittal planes was measured using computed tomography (CT).
  
  
  RESULTS
  Axial views of the anterior column were found successfully in all of the pelvic specimens, and the guide pins were inserted accurately into the acetabular anterior column under C-arm fluoroscopic guidance. On the CT-reconstructed image, the average degree of angle between the guide pin and the sagittal plane was 33.6° (range 29.6°-36.5°). The average angle between the guide pin and the transverse plane was 59.1° (range 56.4°-63.2°).
  
  
  CONCLUSIONS
  This axial view of the acetabular anterior column is a novel X-ray projection which provides an optimal method for guiding percutaneous insertion of anterior column screws for acetabular fractures.
authors.affiliation: Orthopedics Trauma Center, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 86-050051, China.
authors.forename: Zhanle
authors.initials: Z
authors.lastname: Zheng
authors.affiliation: Department of Radiology, The Third Hospital of Hebei Medical University, Shijiazhuang, 86-050051, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Wu
authors.affiliation: Department of Endocrinology, The General Hospital of Hebei Province, Hebei Medical University, Shijiazhuang, 86-050051, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Yu
authors.affiliation: Orthopedics Trauma Center, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 86-050051, China.
authors.forename: Jinshe
authors.initials: J
authors.lastname: Pan
authors.affiliation: Department of Radiology, The Third Hospital of Hebei Medical University, Shijiazhuang, 86-050051, China.
authors.forename: Mahrukh
authors.initials: M
authors.lastname: Latif
authors.affiliation: Orthopedics Trauma Center, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 86-050051, China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Hou
authors.affiliation: Orthopedics Trauma Center, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 86-050051, China. lancelotzzl@163.com.
authors.forename: Yingze
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000293:injuries / Q000601:surgery; D000328:Adult; D001863:Bone Screws; D002102:Cadaver; D005260:Female; D005471:Fluoroscopy; D005593:Fracture Fixation, Internal / Q000295:instrumentation* / Q000379:methods; D050723:Fractures, Bone / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged