title: A multimodal approach in total hip arthroplasty preoperative templating.
abstract: OBJECTIVE
  Accurate preoperative planning is mandatory for a successful total hip arthroplasty (THA). Templating helps to achieve multiple technical goals, including offset restoration, leg-length equality, and components positioning. This study aims to measure how successful a new stepwise method for preoperative radiographic templating is in achieving postoperative restoration of anatomy.
  
  
  METHODS
  We measured the relationship of several radiographic landmarks on the affected limb in comparison to the unaffected limb to define the appropriate position of the components. One hundred consecutive patients with unilateral disease undergoing THA were retrospectively analyzed. The preoperative templates were compared with the postoperative radiographs.
  
  
  RESULTS
  Accuracy in achieving the desired offset, leg-length discrepancy within 5 mm, was 93 % and 100 % respectively. Acetabular component positioning within 2° was replicated in 92 %.
  
  
  CONCLUSIONS
  We conclude that this technique can help the surgeon to accurately reproduce the anatomy of the contralateral unaffected hip.
authors.affiliation: Centro Eccellenza Sostituzioni Articolari Toscana (CESAT), Clinica Ortopedica Universita' di Firenze, Florence, Italy.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Marcucci
authors.forename: Pier Francesco
authors.initials: PF
authors.lastname: Indelli
authors.forename: Leonardo
authors.initials: L
authors.lastname: Latella
authors.forename: Paolo
authors.initials: P
authors.lastname: Poli
authors.forename: Devin
authors.initials: D
authors.lastname: King
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods* / Q000706:statistics & numerical data; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D007558:Italy / Q000453:epidemiology; D007592:Joint Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging / Q000379:methods* / Q000706:statistics & numerical data; D011300:Preoperative Care / Q000379:methods / Q000706:statistics & numerical data; D015995:Prevalence; D017755:Prosthesis Fitting / Q000379:methods* / Q000706:statistics & numerical data; D011859:Radiography; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012307:Risk Factors; D012680:Sensitivity and Specificity; D025321:Surgery, Computer-Assisted / Q000379:methods / Q000706:statistics & numerical data; D016896:Treatment Outcome