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KMID : 0386119990410010153
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Journal of the Korean Radiological Society
1999 Volume.41 No. 1 p.153 ~ p.158
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Complete and Partial-Thickness Tears of the Anterior Cruciate Ligament : Differential Features Seen on MR Imaging
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Eo Geun
Pyo Hyun-Sun
Lee Hyung-Rae
Kim Jang-Min
Kim Young-Sun
Lee Jung-Hee
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Abstract
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Purpose : To evaluate the differential features of complete and partial-thickness tears of the anterior cruciate ligament, as seen on magnetic resonance imaging(MRI).
Materials and Methods : We retrospectively reviewed MR images of 36 patients with ACL injuries (complete tear 16, incomplete tear 20). In all cases, the presence of an ACL tear was determined by arthroscopy or surgery. Primary and secondary signs of ACL injury and associated injuries were assessed.
Results : Ligamentous discontinuity of the ACL was observed in ten complete tears (63%), but in only four(10%) of those that were partial (p=0.009). In addition, complete tears were more likely to show a low degree of ACL axis, less than 45°(11/16 : 2/20, p=0.001). There was, however, no statistically significant difference between complete
and partial tears with regard to signal intensity of ACL, PCL buckling or angle, anterior displacement of the tibia, uncovered meniscus sign, deep notch sign, empty notch sign, and associated injuries.
Conclusion : Ligamentous discontinuity and the ACL axis are features which usefully differentiate between complete and partial tears of the ACL.
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KEYWORD
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Knee injuries, Knee MR, Knee ligaments menisci and cartilage, Ligaments,
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