MRI evaluation of coracoclavicular ligament injury in acromioclavicular joint separation
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Katsumi Takase
- چاپ و سال / کشور: 2011
Description
Backgrounds 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 classiWcations. In this study, we investigated the location and degree of ligament injury in acromioclavicular joint separation by means of magnetic resonance (MR) images. Study designs Cross-sectional study. Methods 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 classiWcation 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. Results Both the trapezoid and conoid ligaments had ruptured in Wfteen cases of the seventeen cases in types 3 and 5. Both ligaments had ruptured at the same locations in eleven of the Wfteen cases. However, there were four cases in which the ligaments had ruptured at diVerent locations. On the other hand, the conoid ligaments did not clearly demonstrate abnormal Wndings, but the trapezoid ligaments had ruptured in all cases of type 2. Conclusion The coracoclavicular ligament injuries evaluated by MR images and enhanced MR images were not always coincident with Rockwood’s classiWcation criteria from plain X-ray Wlms, especially in types 2 and 3 of acromioclavicular joint separation
Eur J Orthop Surg Traumatol DOI 10.1007/s00590-011-0760-7 Received: 12 October 2010 / Accepted: 26 January 2011
