摘要
目的 探讨前交叉韧带（ACL）重建术后ACL移植物和骨隧道的3D MRI表现和演变规律.方法 回顾性分析26例双束ACL重建和16例单束ACL重建患者行3D MRI术后随访56例次的资料,用多平面重组法显示和评价移植物、骨隧道、固定器及并发症,计算术后不同时期低信号及高信号移植物的比例和骨隧道周围骨髓水肿的出现率.结果 发现低信号移植物24例次,高信号移植物32例次.移植物固定2例股骨端采用横杆,1例股骨端使用纽扣,其余部位使用可吸收螺钉.术后3个月、6～9个月和12个月及以上低信号移植物比例分别为20/25、0/14和4/10,高信号移植物比例分别为5/25、14/14和6/10,骨隧道周围骨髓水肿出现比例分别为54/54、10/32和4/26.发现1例移植物撕裂,4例胫骨隧道偏前伴ACL移植物髁间窝顶撞击,3例股骨隧道偏前,2例可吸收螺钉与骨隧道不匹配.结论 3D MRI可准确显示ACL重建术后移植物、骨隧道和固定器的状态及并发症信息,移植物信号在术后呈先增高再恢复低信号的过程.
Objective To investigate the postoperative 3D MRI appearances and their evolvement patterns of ACL grafts and bone tunnels at follow-up.Methods There were 26 double bundles ACL reconstructions and 16 single bundle ACL reconstructions,and a total of 56 follow-up 3D MR Imaging.MR images were reconstructed with MPR technique to evaluate grafts,bone tunnels,fixers and associated.complications.Proportions of grafts with hypointensity or hyperintensity and occurrence rates of marrow edema around bone tunnels were calculated respectively among groups of different periods after operation.Results There were 24 grafts of hypointensity and 32 grafts of hyperintensity.Grafts of 2 cases were suspended with cross pins within femoral tunnels,graft of 1 case was suspended with an endobutton within the femoral tunnel,and grafts of other sites were fixed with interference screws.In the three periods as 3 months,6 to 9 months and over 12 months after cruciate ligament reconstruction,proportions of hypointensive grafts were 20/25,0/14 and 4/10 respectively,while proportions of hyperintensive grafts were 5/25,14/14 and 6/10 respectively,occurrence proportions of marrow edema around bone tunnels were 54/54,10/32 and 4/26 respectively.There was 1 tear graft,4 tibial tunnels placed anteriorly with ACL graft impingement on the intercondylar roof,3 femoral tunnels placed anteriorly,and 2 bone tunnels with mismatching interference screws.Conclusion 3D MRI can accurately demonstrate the state of ACL grafts,bone tunnels,fixers and associated complications.Intensity of grafts presented a rise and reduce pattern after operation.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2011年第12期1143-1146,共4页
Chinese Journal of Radiology
关键词
前交叉韧带
移植物
磁共振成像
Anterior cruciate ligament
Graft
Magnetic resonance imaging
