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Journal of Bone and Joint Surgery - British Volume, Vol 91-B, Issue 7, 903-906.
doi: 10.1302/0301-620X.91B7.21476  
Copyright © 2009 by British Editorial Society of Bone and Joint Surgery
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The reliability and accuracy of digital templating in total knee replacement

R. W. Trickett, MBBch, MRCS, Specialty Registrar, Trauma and Orthopaedics1; P. Hodgson, MBBch, MRCS, Specialty Registrar, Trauma and Orthopaedics1; M. C. Forster, MB ChB, FRCS(Ed), FRCS(TrandOrth), Consultant Trauma and Orthopaedic Surgeon1; and A. Robertson, BSc(Med Sci), FRCSEd(Tr & Orth), PgDip Sports & Exercise Medicine, MFSEM(UK), Consultant Trauma and Orthopaedic Surgeon1

1 Cardiff and Vale Orthopaedic Centre, Llandough Hospital, Penlan Road, Llandough CF64 2XX, UK.

Correspondence should be sent to Mr R. W. Trickett; e-mail: ryan{at}trickett00.fsnet.co.uk

We aimed to determine the reliability, accuracy and the clinical role of digital templating in the pre-operative work-up for total knee replacement.

Initially a sample of ten pre-operative digital radiographs were templated by four independent observers to determine the inter- and intra-observer reliability of the process. Digital templating was then performed on the radiographs of 40 consecutive patients undergoing total knee replacement by a consultant surgeon not involved with the operation, who was blinded to the size of the implant inserted. The Press Fit Condylar Sigma Knee system was used in all the patients. The size of the implant as judged by templating was then compared to that of the size used.

Good inter- and intra-observer agreement was demonstrated for both femoral and tibial templating. However, the correct size of the implant was predicted in only 48% of the femoral and 55% of the tibial components. Albeit reproducible, digital templating does not currently predict the correct size of component often enough to be of clinical benefit.




eLetters:

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The reliability and accuracy of digital templating in total knee replacement
Chris Hoare, et al.
J Bone Joint Surg Br Online, 7 Aug 2009 [Full text]
Authors' reply:
Ryan W Trickett, et al.
J Bone Joint Surg Br Online, 16 Sep 2009 [Full text]

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Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General