An Algorithm for Locating the Center of the Ankle Joint in Knee Navigation Surgery

Marchant, Darren C., Rimmington, Dale P., Crawford, Ross W., Whitehouse, Sarah L., & McGuire, Joanne (2005) An Algorithm for Locating the Center of the Ankle Joint in Knee Navigation Surgery. Computer Aided Surgery, 10(1), pp. 45-49.

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The primary aim of computer assisted knee arthroplasty is to improve the alignment of the implanted prostheses. Accurate component alignment is dependent on the establishment of accurate anatomical reference points. Current techniques of establishing the center of the ankle joint, especially in the coronal plane, rely solely on clinical judgement in relation to the position of the center of the ankle joint. The aim of this study is to determine if an algorithm can be developed, based on establishing the most prominent points on the medial and lateral malleoli on 3-D CT scans, to accurately and reproducibly establish the position of the center of the ankle joint. To determine this, images of 20 ankles were obtained and axial, coronal, and sagittal 2- D reconstructions were manipulated on a workstation. Two observers independently performed relevant measurements and calculations. The calculated data was found to be reproducible with a very small standard deviation in each plane. This algorithm is able to give accurate measurements of the ankle joint in knee navigation surgery. Caution must be exercised in anatomically abnormal ankles as the calculations of the ankle center were found to be significantly different

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ID Code: 5579
Item Type: Journal Article
Refereed: Yes
DOI: 10.1080/10929080500230536
ISSN: 1092-9088
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300) > Orthopaedics (110314)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2005 Taylor & Francis
Copyright Statement: First published in Computer Aided Surgery 10(1):pp. 45-49.
Deposited On: 27 Nov 2006 00:00
Last Modified: 09 Jun 2010 12:35

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