Quantitative analysis of T2 relaxation times of the patellofemoral joint cartilage 3 years after anterior cruciate ligament reconstruction
Quantitative analysis of T2 relaxation times of the patellofemoral joint cartilage 3 years after anterior cruciate ligament reconstruction
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DOI：
10.1016/j.jot.2017.06.002
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发表时间：
2018-01-01
影响因子：
6.6
通讯作者：
Li, Guoan
中科院分区：
文献类型：
--
作者：
Kim, Chang-Wan;Hosseini, Ali;Li, Guoan
目的：使用T2标测磁共振成像评估术后3年患者特定髌股关节（PFJ）软骨，并将未受伤对侧作为对照。假设：前交叉韧带（ACL）重建膝关节中PFJ的软骨在3年随访时与未受伤的对侧膝关节相比显示T2值增加，方法：前瞻性纳入10例ACL重建术后3年临床成功的患者。使用T2标测获得双膝关节的MRI图像。将肱骨髁和髌骨的内侧、中央和外侧区域的软骨分为浅部和深部。结果：总体而言，ACL重建膝关节内侧和中央trophilar软骨浅层的T2值显著高于未受伤对侧膝关节的T2值4.23 +/- 9.09毫秒（8.9%; p Z 0.043）和5.94 +/- 8.12毫秒（10.9%; p = 0.019）。在其他软骨区的大转子和髌骨没有发现显着差异。在个体患者分析中，在所有10名患者中发现ACL重建膝关节的T2值在至少一个浅区域中增加，在至少一个深区域中发现8名患者，在至少一个浅区域中发现5名患者，在至少一个深区域中发现8名患者。尽管前交叉韧带重建临床效果令人满意（前后抽屉和轴移试验阴性），所有患者在ACL重建后3年至少有一个PFJ软骨T2值增加的区域，特别是在小腿软骨的内侧室。(C)2017年，作者。由爱思唯尔（新加坡）私人有限公司代表华语矫正学会出版。
Objective: To evaluate patient-specific patellofemoral joint (PFJ) cartilage 3 years postoperatively using T2 mapping magnetic resonance imaging and the uninjured contralateral side as control.Hypothesis: The cartilage of the PFJ in the anterior cruciate ligament (ACL) reconstructed knees would show increased T2 values compared to the uninjured contralateral knees at 3-year follow-up, and the femoral (trochlear) cartilage would be more susceptible than the patella in degeneration in ACL-reconstructed knees.Methods: Ten patients with clinically successful ACL-reconstructed knees were prospectively enrolled 3 years postoperatively. Sagittal images of both knees were obtained using T2 mapping. Cartilage over the medial, central, and lateral regions of the trochlea and patella was divided into superficial and deep regions. Average T2 values of the cartilage at each region of interest of the ACL-reconstructed and uninjured contralateral knees were compared for each individual patient.Results: Overall, the T2 values at the superficial layers of the medial and central trochlear cartilage of the ACL-reconstructed knees were significantly higher than those of the uninjured contralateral knees by 4.23 +/- 9.09 milliseconds (8.9%; p Z 0.043) and 5.94 +/- 8.12 milliseconds (10.9%; p = 0.019), respectively. No significant difference was found in other cartilage areas of the trochlea and patella. In individual patient analysis, increased T2 values of ACL-reconstructed knees were found in all 10 patients in at least one superficial region and eight patients in at least one deep region of the trochlear cartilage, five patients in at least one superficial region, and eight patients in at least one deep region of the patellar cartilage.Conclusion: Despite a clinically satisfactory ACL reconstruction (with negative anteroposterior drawer and pivot shift tests), all patients showed at least one region with increased T2 value of the PFJ cartilage 3 years after ACL reconstruction, especially at the medial compartment of the trochlear cartilage. (C) 2017 The Authors. Published by Elsevier (Singapore) Pte Ltd on behalf of Chinese Speaking Orthopaedic Society.