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THE MRI-BASED COMPARISON OF NORMAL- AND ABNORMAL-SIDE RETRODISCAL TISSUE, AND RELATIONSHIP BETWEEN CLINICAL EXAMINATION & THE MRI FINDINGS OF RETRODISCAL TISSUE IN PATIENTS WITH UNILATERAL TMJ INTERNAL DERANGEMENT  

Yoon, Hyun-Joong (Div. of Oral & Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, The Catholic university of Korea)
Park, Chul-Hong (Div. of Oral & Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, The Catholic university of Korea)
Kim, Jin (Div. of Oral & Maxillofacial Surgery, Dept. of Dentistry, College of Medicine, The Catholic university of Korea)
Publication Information
Journal of the Korean Association of Oral and Maxillofacial Surgeons / v.28, no.4, 2002 , pp. 330-335 More about this Journal
Abstract
The study was performed to investigate the comparison of relative signal intensity of normal- and abnormal-side retrodiscal tissue, and relationship between clinical examination, joint effusion and relative signal intensity of retrodiscal tissue in patients with unilateral TMJ internal derangement. The study group comprised 19 females and 9 males, with a mean age of 29 years. After measurements of the signal intensity were made on the MR imager for the T2 weighted images on retrodiscal tissue and brain gray matter, we calculated relative value and tried to find relationship between clinical examination, joint effusion and relative signal intensity on normal- and abnormal-side. The results are as follows. 1. The gray matter is an appropriate reference point. 2. The relative signal intensity is high significantly in abnormal-side retrodiscal tissue compared with normal-side retrodiscal tissue. 3. The relative signal intensity is high significantly in painful joints compared with nonpainful joints and in joints with joint effusion compared with joints without joint effusion. 4. The relative signal intensity in normal joints, joints with reduction and joints without reduction is increased in order significantly.
Keywords
Relative signal intensity; Retrodiscal tissue; Unilateral TMJ internal derangement;
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