Improving in vivo knee kinematic measurements: application to prosthetic ligament analysis

The accuracy of three-dimensional (3D) in vivo knee measurement is presently limited by artifacts from movement of soft tissue surrounding the underlying bone. To improve 3D measurement, a mechanical fixation system is proposed which attaches sensors onto the underlying bone non-invasively. A 3D X-r...

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Bibliographic Details
Published in:The knee 1996-10, Vol.3 (4), p.179-190
Main Authors: Sati, M., de Guise, J.A., Larouche, S., Drouin, G.
Format: Article
Language:English
Subjects:
Kinematics
Knee
Marker-attachment
Measurement
Prosthetic ligament
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Summary:The accuracy of three-dimensional (3D) in vivo knee measurement is presently limited by artifacts from movement of soft tissue surrounding the underlying bone. To improve 3D measurement, a mechanical fixation system is proposed which attaches sensors onto the underlying bone non-invasively. A 3D X-ray technique is used to show that the system can measure knee kinematics over 65° flexion with an average accuracy of −0.4° ab-adduction rotation, −2.3° for axial rotation, 2.4 mm for antero-posterior translation and 1.1 mm for axial translation. To demonstrate a clinical application of the system, its use to predict prosthetic ligament bending and torsion deformations in vivo is reported.
ISSN:0968-0160
1873-5800
DOI:10.1016/S0968-0160(96)00209-8