title: Intraoperative navigation in hip surface arthroplasty: a radiographic comparative analysis study.
abstract: BACKGROUND
  The goal of the current prospective randomised radiological study was to determine the accuracy of conventional and computer-assisted femoral component implantation in surface arthroplasty (SRA).
  
  
  METHODS
  We analysed on standard radiographs the femoral component positions after 30 conventional instrumented (Group 1) and 30 navigated (Group 2) SRA femoral components. We evaluated: varus or valgus orientation, horizontal femoral offset and translation of the component.
  
  
  RESULTS
  The tendency to implant the femoral component in mild valgus position (2.8 degrees in Group 1 compared to 2.1 degrees in Group 2), more distally and ventrally in the femoral neck (in Group 1) and with femoral off-set increase (4.8 mm in Group 1 compared to 3.4 mm in Group 2) was found.
  
  
  CONCLUSIONS
  The navigation system enables a more accurate insertion of the femoral component.
authors: Department of Orthopaedics and Traumatology, General Hospital Znojmo, 11 Dr. Jana Janského, 669 02 Znojmo, Czech Republic. primar.ortopedie@nemzn.cz
authors: Radek
authors: R
authors: Hart
authors: Pavel
authors: P
authors: Sváb
authors: Peter
authors: P
authors: Filan
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design; D011859:Radiography; D025321:Surgery, Computer-Assisted