Imperial College London
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ProfessorAndrewAmis

Faculty of Engineering, Department of Mechanical Engineering

Professor
 
 
 
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Contact

 

+44 (0)7722 225 409a.amis

 
 
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Assistant

 

Ms Fabienne Laperche +44 (0)20 7594 7033

 
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Location

 

713City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Willinger:2023:10.1177/03635465231161071,
author = {Willinger, L and Athwal, KK and Holthof, S and Imhoff, AB and Williams, A and Amis, AA},
doi = {10.1177/03635465231161071},
journal = {American Journal of Sports Medicine},
pages = {1136--1145},
title = {Role of the anterior cruciate ligament, anterolateral complex, and lateral meniscus posterior root in anterolateral rotatory knee instability: a biomechanical study},
url = {http://dx.doi.org/10.1177/03635465231161071},
volume = {51},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - BACKGROUND: Injuries to the anterior cruciate ligament (ACL), Kaplan fibers (KFs), anterolateral capsule/ligament (C/ALL), and lateral meniscus posterior root (LMPR) have been separately linked to anterolateral instability. PURPOSE: To investigate the contributions of the ACL, KFs, C/ALL, and LMPR to knee stability and to measure instabilities resulting from their injury. STUDY DESIGN: Controlled laboratory study. METHODS: Ten fresh-frozen human knees were tested robotically to determine restraints of knee laxity at 0° to 90° of flexion. An 88-N anterior-posterior force (anterior and posterior tibial translation), 5-N·m internal-external rotation, and 8-N·m valgus-varus torque were imposed and intact kinematics recorded. The kinematics were replayed after sequentially cutting the structures (order varied) to calculate their contributions to stability. Another 10 knees were tested in a kinematics rig with optical tracking to measure instabilities after sequentially cutting the structures across 0° to 100° of flexion. One- and 2-way repeated-measures analyses of variance with Bonferroni correction were used to find significance (P < .05) for the robotic and kinematics tests. RESULTS: The ACL was the primary restraint for anterior tibial translation; other structures were insignificant (<10% contribution). The KFs and C/ALL resisted internal rotation, reaching 44% ± 23% (mean ± SD; P < .01) and 14% ± 13% (P < .05) at 90°. The LMPR resisted valgus but not internal rotation. Anterior tibial translation increased after ACL transection (P < .001) and after cutting the lateral structures from 70° to 100° (P < .05). Pivot-shift loading increased anterolateral rotational instability after ACL transection from 0° to 40° (P < .05) and further after cutting the lateral structures from 0° to 100° (P < .01). CONCLUSION: The anterolateral complex acts as a functional unit to provi
AU  - Willinger,L
AU  - Athwal,KK
AU  - Holthof,S
AU  - Imhoff,AB
AU  - Williams,A
AU  - Amis,AA
DO  - 10.1177/03635465231161071
EP  - 1145
PY  - 2023///
SN  - 0363-5465
SP  - 1136
TI  - Role of the anterior cruciate ligament, anterolateral complex, and lateral meniscus posterior root in anterolateral rotatory knee instability: a biomechanical study
T2  - American Journal of Sports Medicine
UR  - http://dx.doi.org/10.1177/03635465231161071
UR  - https://www.ncbi.nlm.nih.gov/pubmed/36917838
UR  - https://journals.sagepub.com/doi/10.1177/03635465231161071
UR  - http://hdl.handle.net/10044/1/103610
VL  - 51
ER  -
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