Linked Life Data

8119016

Source:http://linkedlifedata.com/resource/pubmed/id/8119016

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
299
pubmed:dateCreated
1994-4-7
pubmed:abstractText
From 1983 to 1989, 147 unicompartmental knee arthroplasties (UKA) were performed. Eighteen knees (13%) have required revision: there were 11 (37%) Porous Coated Anatomic (PCA), three (8%) Microloc, and four (17%) Fibermesh UKAs. Retrieved implants were examined to determine the pattern and extent of polyethylene wear. Wear was severe in each series and was characterized by delamination, pitting, peripheral cracking, deformation, and abrasion. Polyethylene failure appeared to result from large localized stresses resulting from lack of conformity of the articular geometries of the prostheses. Progressive subluxation of the implants occurred that produced very high localized contact stresses at the periphery of the tibial component where the polyethylene was thinnest. The progression of osteoarthritis in these knees, particularly the attenuation of the anterior cruciate ligament, increased the tendency of these incongruous implants to subluxate. Although changes in the design and manufacturing of unicompartmental knee arthroplasties may increase the resistance of these implants to polyethylene wear, the progression of osteoarthritis at an unpredictable rate is likely to be associated with persistent polyethylene wear in this type of arthroplasty.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0009-921X
pubmed:author
pubmed:issnType
Print
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
18-24
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Polyethylene wear in unicompartmental knee arthroplasty.
pubmed:affiliation
Department of Orthopaedic Surgery, Northwestern University, Evanston Hospital, Illinois.
pubmed:publicationType
Journal Article, Comparative Study