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Erschienen in: European Radiology 8/2014

01.08.2014 | Musculoskeletal

Quantitative magnetic resonance imaging (MRI) evaluation of cartilage repair after microfracture (MF) treatment for adult unstable osteochondritis dissecans (OCD) in the ankle: correlations with clinical outcome

verfasst von: Hongyue Tao, Xiliang Shang, Rong Lu, Hong Li, Yinghui Hua, Xiaoyuan Feng, Shuang Chen

Erschienen in: European Radiology | Ausgabe 8/2014

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Abstract

Objectives

To quantitatively evaluate cartilage repair after microfracture (MF) for ankle osteochondritis dissecans (OCD) using MRI and analyse correlations between MRI and clinical outcome.

Methods

Forty-eight patients were recruited and underwent MR imaging, including 3D-DESS, T2-mapping and T2-STIR sequences, and completed American Orthopaedic Foot and Ankle Society (AOFAS) scoring. Thickness index, T2 index of repair tissue (RT) and volume of subchondral bone marrow oedema (BME) were calculated. Subjects were divided into two groups: group A (3–12 months post-op), and group B (12–24 months post-op). Student’s t test was used to compare the MRI and AOFAS score between two groups and Pearson’s correlation coefficient to analyse correlations between them.

Results

Thickness index and AOFAS score of group B were higher than group A (P < 0.001, P < 0.001). T2 index and BME of group B were lower than group A (P < 0.001, P = 0.012). Thickness index, T2 index and BME were all correlated with AOFAS score (r = 0.416, r = −0.475, r = −0.353), but BME was correlated with neither thickness index nor T2 index.

Conclusions

Significant improvement from MF can be expected on the basis of the outcomes of quantitative MRI and AOFAS score. MRI was correlated with AOFAS score. BME is insufficient as an independent predictor to evaluate repair quality, but reduction of BME can improve the patient’s clinical outcome.

Key Points

Patients with unstable ankle OCD had satisfactory clinical outcome after MF.
Quantitative MRI correlates with clinical outcome after MF for ankle OCD.
The reduction of subchondral BME will improve the patient’s clinical outcome.
Quantitative MRI can monitor the process of cartilage repair over time.
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Metadaten
Titel
Quantitative magnetic resonance imaging (MRI) evaluation of cartilage repair after microfracture (MF) treatment for adult unstable osteochondritis dissecans (OCD) in the ankle: correlations with clinical outcome
verfasst von
Hongyue Tao
Xiliang Shang
Rong Lu
Hong Li
Yinghui Hua
Xiaoyuan Feng
Shuang Chen
Publikationsdatum
01.08.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 8/2014
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-014-3196-8

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