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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 3/2016

01-03-2016 | Knee

Changes in sagittal component alignment alters patellar kinematics in TKA: an in vitro study

Authors: Armin Keshmiri, Hans Robert Springorum, Clemens Baier, Florian Zeman, Joachim Grifka, Günther Maderbacher

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 3/2016

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Abstract

Purpose

Patellar maltracking due to incorrect component alignment is considered as a main reason for anterior knee pain after total knee arthroplasty (TKA). In contrast to coronal and axial component placement, the influence of sagittal component alignment on patellar kinematics has not been investigated so far.

Methods

In ten lower cadaveric limbs, TKAs were implanted using a commercial computer navigation system. In six knees, the femoral component was aligned in 5° and in four knees in 0° of flexion, respectively. Patellar kinematics were registered by means of a computer navigation system using an additional patella tracking array and correlated with femoral and tibial sagittal component alignment.

Results

Sagittal component alignment significantly altered patellar mediolateral shift (p < 0.05). In contrast, patellar epicondylar distance, rotation and tilt were not significantly influenced.

Conclusions

Sagittal component alignment in TKA has a major impact on patellar kinematics and should therefore be considered while addressing tibiofemoral kinematics intraoperatively.
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Metadata
Title
Changes in sagittal component alignment alters patellar kinematics in TKA: an in vitro study
Authors
Armin Keshmiri
Hans Robert Springorum
Clemens Baier
Florian Zeman
Joachim Grifka
Günther Maderbacher
Publication date
01-03-2016
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 3/2016
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-016-4004-6

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