title: Personalized image-based templates for precise acetabular prosthesis placement in total hip arthroplasty: a pilot study.
abstract: OBJECTIVE
  In order to achieve accurate implantation of the acetabular prosthesis in total hip arthroplasty (THA), we designed individual templates based on a three-dimensional (3D) model generated from computed tomography (CT) scans.
  
  
  METHODS
  Individual templates were designed for 12 patients who underwent THA. A physical template was designed to conform to the contours of the patient's acetabulum and to confirm the rotation of the acetabular center. This guided the acetabular component orientation.
  
  
  RESULTS
  The preoperative and postoperative X-ray and CT scans were obtained to assess the location with respect to the accuracy of the acetabular component. For all patients, the abduction angle of the acetabular component was 46.7 degrees to 54.3 degrees and the anteversion angle was 11.3 degrees to 18.5 degrees .
  
  
  CONCLUSIONS
  The assessment of postoperative CT scans demonstrated higher accuracy of the acetabular component bore when used with the individual template. Therefore, the individual template can be an alternative to the computer-assisted navigation systems, with a good cost-performance ratio.
authors.affiliation: Department of Orthopaedics, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.forename: Sheng-xiang
authors.initials: SX
authors.lastname: Xiao
authors.forename: Peng-cheng
authors.initials: PC
authors.lastname: Gu
authors.forename: Xiang-jin
authors.initials: XJ
authors.lastname: Lin
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000601:surgery; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D006615:Hip / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D014057:Tomography, X-Ray Computed / Q000379:methods*
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