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{Athwal:2017:10.1007/s00167-016-4087-0,
author = {Athwal, KK and El, Daou H and Inderhaug, E and Manning, W and Davies, AJ and Deehan, DJ and Amis, AA},
doi = {10.1007/s00167-016-4087-0},
journal = {Knee Surgery Sports Traumatology Arthroscopy},
pages = {2646--2655},
title = {An in vitro analysis of medial structures and a medial soft tissue reconstruction in a constrained condylar total knee arthroplasty},
url = {http://dx.doi.org/10.1007/s00167-016-4087-0},
volume = {25},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Purpose: The aim of this study was to quantify the medial soft tissue contributions to stability following constrained condylar (CC) total knee arthroplasty (TKA) and determine whether a medial reconstruction could restore stability to a soft tissue-deficient, CC-TKA knee.Methods: Eight cadaveric knees were mounted in a robotic system and tested at 0°, 30°, 60°, and 90° of flexion with ±50 N anterior–posterior force, ±8 Nm varus–valgus, and ±5 Nm internal–external torque. The deep and superficial medial collateral ligaments (dMCL, sMCL) and posteromedial capsule (PMC) were transected and their relative contributions to stabilising the applied loads were quantified. After complete medial soft tissue transection, a reconstruction using a semitendinosus tendon graft was performed, and the effect on kinematic behaviour under equivocal conditions was measured.Results: In the CC-TKA knee, the sMCL was the major medial restraint in anterior drawer, internal–external, and valgus rotation. No significant differences were found between the rotational laxities of the reconstructed knee to the pre-deficient state for the arc of motion examined. The relative contribution of the reconstruction was higher in valgus rotation at 60° than the sMCL; otherwise, the contribution of the reconstruction was similar to that of the sMCL.Conclusion: There is contention whether a CC-TKA can function with medial deficiency or more constraint is required. This work has shown that a CC-TKA may not provide enough stability with an absent sMCL. However, in such cases, combining the CC-TKA with a medial soft tissue reconstruction may be considered as an alternative to a hinged implant.
AU  - Athwal,KK
AU  - El,Daou H
AU  - Inderhaug,E
AU  - Manning,W
AU  - Davies,AJ
AU  - Deehan,DJ
AU  - Amis,AA
DO  - 10.1007/s00167-016-4087-0
EP  - 2655
PY  - 2017///
SN  - 0942-2056
SP  - 2646
TI  - An in vitro analysis of medial structures and a medial soft tissue reconstruction in a constrained condylar total knee arthroplasty
T2  - Knee Surgery Sports Traumatology Arthroscopy
UR  - http://dx.doi.org/10.1007/s00167-016-4087-0
UR  - https://link.springer.com/article/10.1007%2Fs00167-016-4087-0
UR  - http://hdl.handle.net/10044/1/57024
VL  - 25
ER  -
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