Document Detail

Accuracy of implantation of components in the Oxford knee using the minimally invasive approach.
MedLine Citation:
PMID:  15979877     Owner:  NLM     Status:  MEDLINE    
Screened postoperative X-rays of 224 Oxford knees implanted through the minimally invasive approach were analysed using 16 criteria. The technique was as recommended by the Oxford Group except that the femoral intramedullary rod was used only as a guide to flexion/extension of the femoral component. All femoral components were within the recommended range for varus/valgus and mediolateral position. Eighteen femoral components were either too flexed or extended, but by a maximum of only 10 degrees . Tibial components were inserted in slight varus (mean 1.8 degrees , S.D. 8.8, range 10 to -10). All were within the range for posterior slope in spite of difficulty in establishing objective landmarks. Tibial coverage was imprecise with the phase 3 implants which were short and broad relative to the cut surface. In 36% of knees the tibial tray was implanted too anterior resulting in posterior under hang. There have been no clinical signs to indicate tipping of the meniscus in deep flexion. The depth of cement penetration under the keel was excessive in three cases, resulting from porotic bone rather than technical error in the depth of the cut. There has been one case of femoral component loosening following a fall and no tibial loosening in spite of imprecise alignment of some components.
David Shakespeare; Michael Ledger; Vera Kinzel
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Publication Detail:
Type:  Journal Article     Date:  2005-06-24
Journal Detail:
Title:  The Knee     Volume:  12     ISSN:  0968-0160     ISO Abbreviation:  Knee     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-11-15     Completed Date:  2006-01-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9430798     Medline TA:  Knee     Country:  England    
Other Details:
Languages:  eng     Pagination:  405-9     Citation Subset:  IM    
Department of Orthopaedics, Warwick Hospital, Lakin Road, Warwick, UK.
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MeSH Terms
Arthroplasty, Replacement, Knee / instrumentation*,  methods
Bone Nails
Internal Fixators
Knee / radiography,  surgery*
Knee Prosthesis*
Range of Motion, Articular
Reproducibility of Results
Surgical Procedures, Minimally Invasive*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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