title: Magnetic resonance imaging applied to the diagnosis of perforation of the temporomandibular joint.
abstract: OBJECTIVE
  To investigate the diagnostic accuracy of magnetic resonance imaging (MRI) for perforation of temporomandibular joint (TMJ).
  
  
  METHODS
  Consecutive 1845 patients (2524 joints) diagnosed as internal derangement (ID) of TMJ were collected from April 2003 to March 2010 in our department. All the patients were examined by MRI and treated by arthroscopy or open surgeries. The findings of interpreting MRI were recorded as positive, suspicious and negative according to the MRI radiographic criteria. After comparing the findings of MRI with those of arthroscopy or open surgeries, the numbers of true positive, true negative, false positive and false negative were obtained. Through SPSS16.0, receiver operator characteristic curve (ROC curve) was made with 1-specificity as abscissa and the sensitivity as ordinate, and the area under the ROC curve was calculated. According to the area, the diagnostic value of MRI was evaluated.
  
  
  RESULTS
  Arthroscopic or open surgeries findings confirmed that 207 joints had disc perforation among all joints. MRI findings showed 189 joints were positive, 197 joints suspicious, and 2138 joints negative. The true positive accuracy of MRI findings was 102/189 while true negative accuracy was 2075/2138. 42 of the 197 suspicious joints had perforation. The area under the ROC curve was 0.808 (0.77, 0.85), P < 0.05.
  
  
  CONCLUSIONS
  We concluded that MRI proved to be a good modality to diagnose disc perforation of TMJ, and the diagnostic result of disc perforation by MRI had certain guiding significance in our clinical work.
authors: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
authors: Pei
authors: P
authors: Shen
authors: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
authors: Liang
authors: L
authors: Huo
authors: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China. Electronic address: zhangshanyong@126.com.
authors: Shan Yong
authors: SY
authors: Zhang
authors: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China. Electronic address: yangchi63@hotmail.com.
authors: Chi
authors: C
authors: Yang
authors: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
authors: Xie Yi
authors: XY
authors: Cai
authors: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, No. 639, Zhi Zao Ju Rd, 200011 Shanghai, People's Republic of China.
authors: Xiu Ming
authors: XM
authors: Liu
mesh_terms: D000328:Adult; D019540:Area Under Curve; D001182:Arthroscopy / Q000706:statistics & numerical data; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000175:diagnosis / Q000601:surgery; D008279:Magnetic Resonance Imaging / Q000706:statistics & numerical data*; D008297:Male; D008335:Mandibular Condyle / Q000473:pathology; D008875:Middle Aged; D054850:Osteophyte / Q000175:diagnosis; D012372:ROC Curve; D012680:Sensitivity and Specificity; D019224:Temporomandibular Joint Disc / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis* / Q000601:surgery
keywords: MRI; Perforation; Temporomandibular joint