Mustonen Antti O T, Tielinen Laura, Lindahl Jan, Hirvensalo Eero, Kiuru Martti, Koskinen Seppo K
Helsinki University Hospital-Radiology, Topeliuksenkatu 5, Helsinki, 00260, Finland.
Skeletal Radiol. 2006 Jul;35(7):515-21. doi: 10.1007/s00256-006-0080-x. Epub 2006 Mar 18.
To analyze with conventional magnetic resonance imaging (MRI) the signal appearance of menisci repaired with bioabsorbable arrows.
Forty-four patients with 47 meniscal tears treated with bioabsorbable arrows underwent follow-up conventional MRI examination. The time interval between the surgery and MRI varied from 5 to 67 months (mean 26 months). Twenty-six patients also had concurrent repair of torn anterior cruciate ligament. The following grades were used to classify meniscal signal intensity: (a) G0; low signal intensity on all sequences and regular configuration in every plane, (b) G1; increased signal intensity within the meniscus, not extending to the meniscal surface, (c) G2; increased signal intensity linear in shape, which may or may not communicate with the capsular margin of the meniscus, without extending to the meniscal surface, and (d) G3; increased signal intensity extending to the meniscal surface.
Thirteen menisci (27.5%) had normal signal intensity, 13 menisci (27.5%) Grade 1 signal intensity, 9 menisci (19%) Grade 2 signal intensity and 12 menisci (26%) Grade 3 signal intensity. The time difference between operation and MRI was statistically significant between the G0 (36 months) and G3 groups (14 months; P = 0.0288). There was no statistical significance in different grades between medial and lateral meniscus or between patients with operated or intact ACL. On physical examination sixteen patients reported slight symptoms, seen evenly in each group.
No difference was seen in different grades between patients with operated or intact ACL. The highest incidence of menisci with a Grade 3 signal was seen in patients where surgery was within the last 18 months.
采用传统磁共振成像（MRI）分析用生物可吸收箭头修复后的半月板信号表现。
44例接受生物可吸收箭头治疗的47处半月板撕裂患者接受了传统MRI随访检查。手术与MRI检查的时间间隔为5至67个月（平均26个月）。26例患者同时进行了前交叉韧带撕裂修复术。采用以下分级对半月板信号强度进行分类：（a）G0级；所有序列上信号强度低，各平面形态规则；（b）G1级；半月板内信号强度增加，未延伸至半月板表面；（c）G2级；信号强度呈线性增加，可能与半月板的关节囊边缘相通，也可能不相通，未延伸至半月板表面；（d）G3级；信号强度增加并延伸至半月板表面。
13处半月板（27.5%）信号强度正常，13处半月板（27.5%）为1级信号强度，9处半月板（19%）为2级信号强度，12处半月板（26%）为3级信号强度。G0组（36个月）和G3组（14个月）手术与MRI检查的时间差异具有统计学意义（P = 0.0288）。内侧和外侧半月板之间或前交叉韧带手术患者与未手术患者之间不同分级无统计学意义。体格检查中，16例患者报告有轻微症状，各组分布均匀。
前交叉韧带手术患者与未手术患者之间不同分级未见差异。手术在过去18个月内的患者中，3级信号半月板的发生率最高。
