caa a22 4500 605459266 CHVBK 20210128100233.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00167-014-2913-9 doi (NATIONALLICENCE)springer-10.1007/s00167-014-2913-9 T2-mapping at 3T after microfracture in the treatment of osteochondral defects of the talus at an average follow-up of 8years [Elektronische Daten] [Christoph Becher, David Zühlke, Christian Plaas, Marc Ewig, Tilman Calliess, Christina Stukenborg-Colsman, Hajo Thermann] Purpose: To compare repaired cartilage with native cartilage, and inter-observer reliability, using T2 mapping at 3T for assessing cartilage repair in osteochondral defects of the talus after the microfracture technique. Methods: We enrolled eight females and seven males undergoing arthroscopic microfracture for osteochondral defects of the talus at an average follow-up of 7.9±2.2years (range 5-13years). Cartilage tissue was assessed using a 3-T magnetic resonance imaging unit with an 8-channel phased array foot and ankle coil (gradient strength, 50mT/m; slew rate, 200T/m/s). T2 maps were then calculated. Three independent boarded specialists evaluated the images, and magnetic resonance observation of cartilage repair tissue scores was used to assess the cartilage and joint status. Clinical results were assessed using the Hannover Scoring System (HSS) for the ankle and the American Orthopaedic Foot and Ankle Society (AOFAS) hind-foot score. Results: No significant mean differences were found between the T2 properties of the repair tissue and those of the native reference cartilage (T2=38.6±5.3ms, range 30.2-55.8ms vs. 40.3±8.5ms, range 31.4-59.8ms, respectively; intra-class correlation coefficient=0.94; confidence interval 0.84-0.99, P≤0.001). Despite ≥50% defect filling in all patients, subchondral bone changes were considerable. The HSS at the follow-up revealed a mean score of 87±12 (range 51-97), and the AOFAS-Score was 90±13 (range 59-100). Conclusions: 3T T2 maps were similar in repaired and native cartilage with good inter-observer reliability. Level of evidence: IV. Springer-Verlag Berlin Heidelberg, 2014 Ankle nationallicence Microfracture technique nationallicence Osteochondral defect nationallicence T2 mapping nationallicence Becher Christoph Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut Zühlke David Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut Plaas Christian Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut Ewig Marc Radiologie am Raschplatz, Hannover, Germany aut Calliess Tilman Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut Stukenborg-Colsman Christina Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut Thermann Hajo Center for Hip, Knee and Foot Surgery, ATOS-Clinic Center, Heidelberg, Germany aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2406-2412 0942-2056 23:8<2406 2015 23 167 https://doi.org/10.1007/s00167-014-2913-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-2913-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Becher Christoph Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut NATIONALLICENCE 700 1- Zühlke David Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut NATIONALLICENCE 700 1- Plaas Christian Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut NATIONALLICENCE 700 1- Ewig Marc Radiologie am Raschplatz, Hannover, Germany aut NATIONALLICENCE 700 1- Calliess Tilman Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut NATIONALLICENCE 700 1- Stukenborg-Colsman Christina Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625, Hannover, Germany aut NATIONALLICENCE 700 1- Thermann Hajo Center for Hip, Knee and Foot Surgery, ATOS-Clinic Center, Heidelberg, Germany aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2406-2412 0942-2056 23:8<2406 2015 23 167