title: The accuracy and reliability of pre-operative templating in revision total knee arthroplasty. A comparison of analogue and digital methods.
abstract: OBJECTIVE
  To determine whether the size of the prostheses used in revision knee arthroplasty may be accurately and reproducibly predicted using analogue or digital pre-operative templating techniques.
  
  
  METHODS
  Pre-operative radiographs were templated using analogue radiographs and acetate templates, digital radiographs and acetate templates and digital radiographs and digital templating software.
  
  
  RESULTS
  Overall accuracy of predicting the size of implant used at surgery was 44%. There was no significant difference in the accuracy of the various templating techniques (p = 0.098).
  
  
  CONCLUSIONS
  Templating in revision knee arthroplasty is neither of suitable accuracy nor reliability enough to safely recommend its use for implant size prediction.
authors.affiliation: Joint Preservation Unit, Department of Orthopaedic Surgery, University of British Columbia Hospital, University of British Columbia, Vancouver, V6T 2B5, Canada.
authors.forename: Neil Prakash Morgan
authors.initials: NP
authors.lastname: Jain
authors.affiliation: Department of Trauma & Orthopaedic Surgery, Derriford Hospital, Plymouth, PL6 8DH, United Kingdom.
authors.forename: Paul Michael
authors.initials: PM
authors.lastname: Guyver
authors.affiliation: Department of Trauma & Orthopaedic Surgery, University Hospital of Wales, Cardiff, CF14 4XW, United Kingdom.
authors.forename: Michael James Hayden
authors.initials: MJ
authors.lastname: McCarthy
authors.affiliation: Department of Trauma & Orthopaedic Surgery, Ayr Hospital, Ayr, KA6 6DX, United Kingdom.
authors.forename: James
authors.initials: J
authors.lastname: Press
authors.affiliation: Department of Trauma & Orthopaedic Surgery, Derriford Hospital, Plymouth, PL6 8DH, United Kingdom.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Keenan
keywords: Analogue; Digital; Reliability; Revision total knee replacement; Templating