Effect of joint line preservation on mobile-type bearing unicompartmental knee arthroplasty: finite element analysis

Effect of joint line preservation on mobile-type bearing unicompartmental knee arthroplasty:... In this study, we performed a virtual mobile-bearing unicompartmental knee arthroplasty (UKA) on the contact pressure in the tibial insert and articular cartilage by using finite element (FE) analysis to understand clinical observations and elaborate on the potential risks associated with a joint line preservation such as wear on tibial insert and osteoarthritis on other compartment. Neutral position of the knee joint was defined in 0 mm joint line, and contact pressure between tibial insert and articular cartilage varies with respect to changes of joint line. Therefore, evaluation of contact pressure may provide the degree of joint line preservation. The FE model for the joint line was developed using a perpendicular projection line from the medial tibial plateau to the anatomical axis. Seven FE models for joint lines in cases corresponding to ± 6, ± 4, ± 2, and 0 mm were modeled and analyzed in normal level walking conditions. The maximum contact pressure on the superior and inferior surfaces of the polyethylene insert increased when the joint line became positive while the maximum contact pressure on the articular cartilage increased when the joint line became negative. The increase in the maximum contact pressure in the positive joint line exceeded that in the negative joint line, and this lead to an unsymmetrical maximum contact pressure distribution with respect to the joint line from a 0 reference. The joint line elevation was sensitive to increases or decreases in maximum contact pressures in the mobile-bearing UKA. The findings of the study determined that postoperative joint line preservation is important in mobile-type bearing UKA. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Physical & Engineering Sciences in Medicine Springer Journals

Effect of joint line preservation on mobile-type bearing unicompartmental knee arthroplasty: finite element analysis

Loading next page...
 
/lp/springer_journal/effect-of-joint-line-preservation-on-mobile-type-bearing-0UhKSmHVGN
Publisher
Springer Journals
Copyright
Copyright © 2018 by Australasian College of Physical Scientists and Engineers in Medicine
Subject
Biomedicine; Biomedicine, general; Biological and Medical Physics, Biophysics; Medical and Radiation Physics; Biomedical Engineering
ISSN
0158-9938
eISSN
1879-5447
D.O.I.
10.1007/s13246-018-0630-2
Publisher site
See Article on Publisher Site

Abstract

In this study, we performed a virtual mobile-bearing unicompartmental knee arthroplasty (UKA) on the contact pressure in the tibial insert and articular cartilage by using finite element (FE) analysis to understand clinical observations and elaborate on the potential risks associated with a joint line preservation such as wear on tibial insert and osteoarthritis on other compartment. Neutral position of the knee joint was defined in 0 mm joint line, and contact pressure between tibial insert and articular cartilage varies with respect to changes of joint line. Therefore, evaluation of contact pressure may provide the degree of joint line preservation. The FE model for the joint line was developed using a perpendicular projection line from the medial tibial plateau to the anatomical axis. Seven FE models for joint lines in cases corresponding to ± 6, ± 4, ± 2, and 0 mm were modeled and analyzed in normal level walking conditions. The maximum contact pressure on the superior and inferior surfaces of the polyethylene insert increased when the joint line became positive while the maximum contact pressure on the articular cartilage increased when the joint line became negative. The increase in the maximum contact pressure in the positive joint line exceeded that in the negative joint line, and this lead to an unsymmetrical maximum contact pressure distribution with respect to the joint line from a 0 reference. The joint line elevation was sensitive to increases or decreases in maximum contact pressures in the mobile-bearing UKA. The findings of the study determined that postoperative joint line preservation is important in mobile-type bearing UKA.

Journal

Australasian Physical & Engineering Sciences in MedicineSpringer Journals

Published: Feb 28, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off