title: Preoperative fluoroscopic imaging reduces variability of acetabular component positioning.
abstract: We evaluated the preoperative errors in the pelvic tilt of 249 hips before total hip arthroplasty using fluoroscopic imaging while the patients were in the lateral decubitus position. The mean absolute value errors of the pelvic tilt were 2.94° (SD, 2.92°), 2.49° (SD, 2.68°), and 5.92° (SD, 5.20°) in the coronal, transverse, and sagittal planes, respectively. Such preoperative errors in the pelvic tilt contribute to malpositioning of the acetabular component, as is frequently observed on postoperative radiographs. We reduced the incidence of malpositioning by correcting the errors in the pelvic tilt through repositioning of the operating table using fluoroscopic imaging before surgery. The new technique using fluoroscopic imaging described in this article can be performed within a short time without a navigation system.
authors.affiliation: Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Nishikubo
authors.forename: Mikihiro
authors.initials: M
authors.lastname: Fujioka
authors.forename: Keiichiro
authors.initials: K
authors.lastname: Ueshima
authors.forename: Masazumi
authors.initials: M
authors.lastname: Saito
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kubo
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000601:surgery*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005471:Fluoroscopy; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D056888:Patient Positioning; D010388:Pelvis / Q000000981:diagnostic imaging*; D011300:Preoperative Care