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Journal of Bone and Joint Surgery - British Volume, Vol 89-B, Issue 4, 557-560.
doi: 10.1302/0301-620X.89B4.17893  
Copyright © 2007 by British Editorial Society of Bone and Joint Surgery
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The accuracy of image-free computer navigation in the placement of the femoral component of the Birmingham Hip Resurfacing

A CADAVER STUDY

E. T. Davis, MB ChB, MSc, FRCS(Trauma&Orth), Clinical Fellow1; P. Gallie, MBBS, FRACS, Clinical Fellow1; K. Macgroarty, MBBS, FRACS(Orth), Clinical Fellow1; J. P. Waddell, MD, FRCSC, Professor of Surgery2; and E. Schemitsch, MD, FRCS(C), Head Division of Orthopaedic Surgery1

1 St Michael’s Orthopaedic Associates, 800-55 Queen Street East, Suite 800, Toronto, Ontario M5C 1R6, Canada.
2 St Michael’s Hospital, 30 Bond Street, Toronto, Ontario M5B, 1W8, Canada.

Correspondence should be sent to Mr E. T. Davis at The Royal Orthopaedic Hospital, Bristol Road South, Northfield, Birmingham B31 2AP, UK; e-mail: eddavis{at}doctors.org.uk

A cadaver study using six pairs of lower limbs was conducted to investigate the accuracy of computer navigation and standard instrumentation for the placement of the Birmingham Hip Resurfacing femoral component. The aim was to place all the femoral components with a stem-shaft angle of 135°.

The mean stem-shaft angle obtained in the standard instrumentation group was 127.7° (120° to 132°), compared with 133.3° (131° to 139°) in the computer navigation group (p = 0.03). The scatter obtained with computer-assisted navigation was approximately half that found using the conventional jig.

Computer navigation was more accurate and more consistent in its placement of the femoral component than standard instrumentation. We suggest that image-free computer-assisted navigation may have an application in aligning the femoral component during hip resurfacing.




eLetters:

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Comparison of manual and image-less computer navigated jig in hip resurfacing arthroplasty
Rajeev Bansal, et al.
J Bone Joint Surg Br Online, 3 Aug 2007 [Full text]

(c) British Editorial Society of Bone and Joint Surgery All Rights Reserved
Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General