MRI evaluation of coracoclavicular ligament injury in acromioclavicular joint separation

作者：Takase Katsumi^*

来源：European Journal of Orthopaedic Surgery and Traumatology, 2011, 21(8): 563-568.

DOI：10.1007/s00590-011-0760-7

• Magnetic resonance images
• Acromioclavicular joint separations
• Trapezoid ligaments
• Conoid ligaments

Acromioclavicular joint separation is divided into three types according to Tossy and six types according to Rockwood. However, the trapezoid and conoid ligaments that constitute the coracoclavicular ligaments are not detailed in these classifications. In this study, we investigated the location and degree of ligament injury in acromioclavicular joint separation by means of magnetic resonance (MR) images.
Cross-sectional study.
The study subjects were 25 patients (21 men and 4 women) ranging in age from 19 to 58 years (mean: 31.1 years). According to Rockwood's classification criteria, these patients consisted of one case in type 1, seven cases in type 2, seven cases in type 3, and ten cases in type 5. All patients were also performed the procedure for MR images and enhanced MR images with intravenous gadolinium injection within 3 days after the occurrence of injury.
Both the trapezoid and conoid ligaments had ruptured in fifteen cases of the seventeen cases in types 3 and 5. Both ligaments had ruptured at the same locations in eleven of the fifteen cases. However, there were four cases in which the ligaments had ruptured at different locations. On the other hand, the conoid ligaments did not clearly demonstrate abnormal findings, but the trapezoid ligaments had ruptured in all cases of type 2.
The coracoclavicular ligament injuries evaluated by MR images and enhanced MR images were not always coincident with Rockwood's classification criteria from plain X-ray films, especially in types 2 and 3 of acromioclavicular joint separation.

• 出版日期2011-12