Document Detail

Discrepancy between anatomical axis and stem position of various femoral components in Japanese.
MedLine Citation:
PMID:  20427826     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To evaluate the discrepancy between the anatomical axis of the distal femur of Japanese patients and the stem position of 5 types of femoral components. METHODS: Lateral radiographs of 12 men and 88 women aged 31 to 83 (mean, 59) years with rheumatoid arthritis were evaluated. The discrepancy between the anatomical axis of the distal femur and the stem position of 5 types of femoral components (Nexgen LCCK, Press-Fit Condylar, Scorpio, Total Stabilizer, and Rotating Hinge) was determined by superimposing the template of each model over each lateral radiograph. RESULTS: The anatomical axis varied widely among our patients, as did the stem position of the 5 femoral components. Stems of all 5 femoral components tended to be more posterior than the anatomical axis. The discrepancy was smallest in the Nexgen LCCK, followed by the Press-Fit Condylar components. It was >3 mm in the other 3 models. In 35% of the patients, none of the prosthesis could be placed in an appropriate position. Smaller-size prostheses appear necessary for the Japanese. CONCLUSION: The stem position should be an important factor guiding selection of the appropriate model. The currently available femoral components may not be appropriate for the Japanese. Prostheses with appropriately positioned stems for Japanese patients with rheumatoid arthritis should be developed.
M Ueno; Ken Urabe; Mamou Fujita; Jun Aikawa; Akimasa Kobayashi; M Itoman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of orthopaedic surgery (Hong Kong)     Volume:  18     ISSN:  1022-5536     ISO Abbreviation:  J Orthop Surg (Hong Kong)     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-04-29     Completed Date:  2010-08-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9440382     Medline TA:  J Orthop Surg (Hong Kong)     Country:  China    
Other Details:
Languages:  eng     Pagination:  11-4     Citation Subset:  IM    
Department of Orthopedic Surgery, Kitasato University Hospital, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
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MeSH Terms
Aged, 80 and over
Arthritis, Rheumatoid / ethnology,  pathology*,  surgery
Arthroplasty, Replacement, Knee
Asian Continental Ancestry Group*
Cohort Studies
Femur / pathology*,  radiography
Knee Prosthesis*
Middle Aged
Prosthesis Design*
Prosthesis Fitting

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

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