Over-voluming predicted by pre-operative planning in 24% of total knee arthroplasty

Over-voluming predicted by pre-operative planning in 24% of total knee arthroplasty Purpose Numerous studies demonstrated that prosthetic overhang and over-sizing cause pain and stiffness following total knee arthroplasty (TKA), but none considered volume changes within the joint capsule. This study was designed to inves- tigate differences in volumes of resected bone compared to implanted components in TKA, and to determine the incidence and factors related to ‘over-voluming’. Methods Three-dimensional reconstructions were created from 100 magnetic resonance imaging scans taken to design patient-specific instruments for TKA. The preoperative simulations were used to calculate the volume ratio (VR) by dividing volume of planned components by that of planned bone resections. Uni- and multi-variable linear regressions were performed to determine associations between ‘over-voluming’ (VR > 1.0) and gender, implant size and version (standard versus narrow), osteophytes, resection levels, external rotation of the femoral component, hip–knee–ankle (HKA) angle, mechanical lateral distal femoral angle (mLDFA), and mechanical medial proximal tibial angle (mMPTA). Results The overall implant/bone volume ratio was 0.91 ± 0.11 (range 0.63–1.16) with ‘over-voluming’ observed in 24 knees. Multi-variable regression confirmed over-voluming to be associated with lower mLDFA (OR 0.66; CI 0.45–0.93; p = 0.026) and extensive osteophytes (OR 0.14; CI 0.03–0.61; p = 0.014), but not HKA angle (OR 0.98; CI 0.76–1.26; http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Knee Surgery, Sports Traumatology, Arthroscopy Springer Journals

Over-voluming predicted by pre-operative planning in 24% of total knee arthroplasty

Loading next page...
 
/lp/springer_journal/over-voluming-predicted-by-pre-operative-planning-in-24-of-total-knee-XJFjF9RoP2
Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA)
Subject
Medicine & Public Health; Orthopedics
ISSN
0942-2056
eISSN
1433-7347
D.O.I.
10.1007/s00167-018-4998-z
Publisher site
See Article on Publisher Site

Abstract

Purpose Numerous studies demonstrated that prosthetic overhang and over-sizing cause pain and stiffness following total knee arthroplasty (TKA), but none considered volume changes within the joint capsule. This study was designed to inves- tigate differences in volumes of resected bone compared to implanted components in TKA, and to determine the incidence and factors related to ‘over-voluming’. Methods Three-dimensional reconstructions were created from 100 magnetic resonance imaging scans taken to design patient-specific instruments for TKA. The preoperative simulations were used to calculate the volume ratio (VR) by dividing volume of planned components by that of planned bone resections. Uni- and multi-variable linear regressions were performed to determine associations between ‘over-voluming’ (VR > 1.0) and gender, implant size and version (standard versus narrow), osteophytes, resection levels, external rotation of the femoral component, hip–knee–ankle (HKA) angle, mechanical lateral distal femoral angle (mLDFA), and mechanical medial proximal tibial angle (mMPTA). Results The overall implant/bone volume ratio was 0.91 ± 0.11 (range 0.63–1.16) with ‘over-voluming’ observed in 24 knees. Multi-variable regression confirmed over-voluming to be associated with lower mLDFA (OR 0.66; CI 0.45–0.93; p = 0.026) and extensive osteophytes (OR 0.14; CI 0.03–0.61; p = 0.014), but not HKA angle (OR 0.98; CI 0.76–1.26;

Journal

Knee Surgery, Sports Traumatology, ArthroscopySpringer Journals

Published: Jun 2, 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