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KMID : 0361620100450030204
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Journal of the Korean Orthopaedic Association
2010 Volume.45 No. 3 p.204 ~ p.209
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Total Knee Arthroplasty Using an Intra-Articular Correction Method in Patients with Extra-Articular Deformity of the Femur
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Bae Dae-Kyung
Song Sang-Joon
Yoon Kyoung-Ho
No Jung-Ho
Lee Se-Min
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Abstract
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Purpose: To investigate the result of total knee arthroplasty (TKA) using an intra-articular correction in patients with extra-articular deformity of the femur.
Materials and Methods: We performed 23 TKAs in 23 patients with extra-articular deformity of the femur. The mean age was 58.0 years and the follow-up period averaged 54.7 months. The American Knee Society’s knee and function score were evaluated, and the mechanical axis (MA) was measured. Sixteen knees with a deformity in the distal third of the femur were assigned to group I and 7 knees with a deformity in the proximal or middle third were assigned to group II. Between groups differences in results were analyzed.
Results: The average knee score was 47.8 preoperatively and 91.6 at the last follow-up. The average function score was 46.9 preoperatively and 89.1 at the last follow-up. The MA averaged varus was 7.7˚ preoperatively and 1.0˚ postoperatively. The average knee score at the last follow-up was 90.1 in group I and 95.0 in group II. The average function score at the last follow-up was 87.8 in group I and 92.1 in group II. The MA averaged varus was 2.0˚ in group I and 1.3˚ in group II (p=0.042).
Conclusion: TKA in conjunction with intra-articular correction produced satisfactory results for patients with an extra-articular deformity of femur. The possibility of incomplete correction of limb alignment should be carefully considered, especially in cases with a severe deformity at the distal third of the femur.
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KEYWORD
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femur, extra-articular deformity, total knee arthroplasty
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