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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 9/2006

01-09-2006 | Knee

New intraoperative protocol for kinematic evaluation of ACL reconstruction: preliminary results

Authors: S. Zaffagnini, S. Bignozzi, S. Martelli, N. Imakiire, N. Lopomo, M. Marcacci

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 9/2006

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Abstract

A real improvement in anterior cruciate ligament (ACL) surgery would be achieved if a global kinematic evaluation of graft performance could be made during surgery. A quantitative evaluation of all residual instabilities would be helpful in the evaluation of graft performances. This paper describes a new protocol for an accurate and extensive computer-assisted in vivo evaluation of joint laxities during ACL reconstruction. Fifteen in vivo kinematic evaluations during ACL reconstruction were performed using an optical localizer and custom software. The capability of the protocol was studied by analyzing the accuracy and repeatability of the results, the ergonomics of the setup, time taken, interactions with the surgical steps, and efficacy of the acquisitions. Repeatability of the tests, at maximum force, remained under 1 mm/2°. Repeatability in tibia position and orientation was lower than 1 mm/4°. Secondary laxities during stress tests remained under 2 mm/3°. Added time to surgery was about 11 min. ACL graft increased joint stability up to 52% with respect to the preoperative level. The simplicity and morbidity of the test procedure and system was minimally invasive and allowed a quantitative evaluation of knee laxities at time zero. The repeatability of the tests opens the way for future research on in vivo evaluation of different ACL reconstruction techniques, which may lead to a better understanding of associated lesions and their role to the global knee stability.
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Metadata
Title
New intraoperative protocol for kinematic evaluation of ACL reconstruction: preliminary results
Authors
S. Zaffagnini
S. Bignozzi
S. Martelli
N. Imakiire
N. Lopomo
M. Marcacci
Publication date
01-09-2006
Publisher
Springer-Verlag
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 9/2006
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-006-0057-2

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