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KMID : 0359620080200020103
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Journal of Korean Knee Society
2008 Volume.20 No. 2 p.103 ~ p.109
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Relationship between the Arthritic Changes and a Deficiency of the Anterior Cruciate Ligament in Osteoarthritic Knees
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Choi Young-Joon
Ahn Hyung-Sun
Kim Chung-Hwan
Hwang Jae-Kwang
Lee Gi-Won
Choi Ji-Ho
Han Hee-Don
Lee Sun-Woo
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Abstract
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Purpose: The aim of this study is to determine the relationship between the arthritic changes and a deficiency of the anterior cruciate ligament (ACL) in osteoarthritic knees.
Materials and Methods : Between May 2003 and January 2008, 815 cases of total knee arthroplasty that were due to degenerative osteoarthritis of the knee were enrolled in this study. Flexion contracture, the tibia-femoral angle, translocation of the tibial spine and erosion on the posteromedial tibial plateau were assessed and we tried to determine the relationship between these findings and an ACL-deficiency.
Results: The mean flexion contracture in the knees with a deficient ACL was 10.7° and this was 8.8° in the knees with an intact ACL, and this difference was statistically significant (p=0.001). The tibia-femoral angle of the patients with an ACL-deficiency was 7.97° varus on average, and that for patients with an intact ACL was 4.38° varus, and the difference was found to be highly dependent upon the ACL`s integrity (p=0.000). 77.6% of the knees with varus deformity exceeding 15° showed an abnormal ACL. Translocation of the tibial spine doesn`t predict ACL integrity. Bone erosion on the posteromedial tibial plateau was significantly frequent in patients with ACL-deficient knees (p=0.000). For the knees with erosion on the posteromedial tibial plateau, 85% of these knees showed an ACL deficiency.
Conclusion: Varus deformity exceeding 15° and erosion on the posteromedial tibial plateau can reflect ACL deficiency.
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KEYWORD
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Anterior cruciate Ligament, Osteoarthritis, Flexion contracture, Varus deformity, Translocation of tibial spine, Erosion on posteromedial tibial plateau
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