Early Aseptic Loosening after Total Knee Replacement Using Legacy Posterior Stabilized-Flex Prosthesis / 대한정형외과학회잡지
The Journal of the Korean Orthopaedic Association
;
: 35-40, 2012.
Article
in Korean
| WPRIM
| ID: wpr-653154
ABSTRACT
PURPOSE:
We analyzed the patterns and causative factors of early aseptic loosening after total knee arthroplasty (TKR) using a legacy posterior stabilized (LPS)-flex prosthesis. MATERIALS ANDMETHODS:
We examined 483 cases that occurred in 311 patients who underwent TKR using LPS-flex by single surgeon between August 2001 and March 2007 and who were followed-up for at least 2 years. The loosened group included 25 cases that exhibited early aseptic loosening on radiograph, the remaining 458 cases were regarded as the control group, and analysis was performed.RESULTS:
The mean loosening period was 34.7 months and femoral component loosening alone was found in 22 cases (88%). There were no statistically significant differences in age, body mass index, or pre-operative range of motion between the 2 groups, but varus deformity was more severe in the loosened group (mean 8.92degrees) than in the control group (mean 5.21degrees) (p=0.003). Protrusion of the femoral component proximally over posterior condyle of the distal femur were more prominent in the loosened group (mean 20.3%) than in the control group (mean 13.4%) (p=0.001).CONCLUSION:
Early loosening after TKR using LPS-flex prosthesis developed mostly in the femoral component. Choosing a proper size for the femoral component and cutting level for the distal femur should be considered.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arthroplasty
/
Prostheses and Implants
/
Congenital Abnormalities
/
Body Mass Index
/
Range of Motion, Articular
/
Arthroplasty, Replacement, Knee
/
Femur
/
Knee
Limits:
Humans
Language:
Korean
Journal:
The Journal of the Korean Orthopaedic Association
Year:
2012
Type:
Article
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