caa a22 4500 605459231 CHVBK 20210128100233.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00167-014-3036-z doi (NATIONALLICENCE)springer-10.1007/s00167-014-3036-z Cartilage status in knees with recurrent patellar instability using magnetic resonance imaging T2 relaxation time value [Elektronische Daten] [Xiaodong Chen, De Li, Wei Wang, Hanlong Xin, Yue Wang, Jianhua Wang] Purpose: The purpose of the study was to analyse the patellar status in patients with recurrent patellar instability and in healthy controls using magnetic resonance imaging (MRI). Methods: One hundred and thirteen patients with patellar instability (patellar instability group) and 50 healthy controls (control group) were studied. All patients underwent computed tomography (CT) to measure the patellofemoral joint anatomy. Meanwhile, MRI was used to investigate cartilage status and to determine the T2 relaxation time value of the patellar cartilage plate. The mean values of these parameters for the patellar instability group and the control group were compared. Results: The CT images of the patellar instability group revealed greatly abnormal anatomy of the patellofemoral joint compared with the control group. By MRI assessment, 32 patients were determined to have a cartilage defect, which was confirmed under arthroscopy. Among the other 81 patients, the T2 relaxation time value of the patellar instability group was significantly higher than that of the control group on the middle (p=0.032) or medial sites (p=0.041) of the patellar cartilage. Conclusions: The patellar instability group exhibits a higher risk of cartilage lesions with abnormal patellofemoral joint anatomy. MRI may enable early detection of these cartilage defects within the patellofemoral joint, enabling clinicians to adopt strategies to delay or prevent cartilage degeneration. Level of evidence: III. Springer-Verlag Berlin Heidelberg, 2014 Patellar instability nationallicence Patellofemoral joint nationallicence Cartilage nationallicence Magnetic resonance imaging nationallicence CT nationallicence Arthroscopy nationallicence Chen Xiaodong Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut Li De Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut Wang Wei Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut Xin Hanlong Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut Wang Yue Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut Wang Jianhua Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2292-2296 0942-2056 23:8<2292 2015 23 167 https://doi.org/10.1007/s00167-014-3036-z 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/s00167-014-3036-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Xiaodong Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Li De Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Wang Wei Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Xin Hanlong Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Wang Yue Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut NATIONALLICENCE 700 1- Wang Jianhua Department of Orthopaedic Surgery, Shanghai Jiao Tong University Xinhua Hospital, 1665# Kongjiang Rd, 200092, Shanghai, People's Republic of China aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2292-2296 0942-2056 23:8<2292 2015 23 167