Linked Life Data

19838674

Source:http://linkedlifedata.com/resource/pubmed/id/19838674

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2010-5-18
pubmed:abstractText
This study evaluated the accuracy of an image-free navigated total knee arthroplasty (TKA) system when used to align deformed tibia bone models. The accuracy was assessed in normal, 10 degrees varus, 20 degrees varus, 10 degrees valgus, and 20 degrees valgus tibia bone models (a total of five tibial models) by direct measurement of the navigated cutting guide. The mean angular errors in the tibial mechanical axes of the normal, 10 degrees, and 20 degrees varus models, respectively, were 0.0 degree, 0.7 degree varus, and 2.4 degrees varus. Thus, the errors seen with the two varus models were significantly larger than that associated with the normal model. The mean angular errors were 0.1 degree varus and 0.4 degree valgus in the 10 degrees and 20 degrees valgus models, respectively. These errors were not significantly different from those obtained with the normal model. These results suggest that in varus-deformed knees, image-free navigation has a tendency to cut the tibia in varus. This fact is considered to be one of the reasons for the lack of superiority of TKA alignment in severely deformed knees when using image-free navigation. Therefore, special attention must be paid when using image-free navigation TKA in such cases.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1433-7347
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
763-8
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Accuracy of image-free navigation for severely deformed knees.
pubmed:affiliation
Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
pubmed:publicationType
Journal Article, Evaluation Studies