Temporomandibular joint disk displacement: Comparison in asymptomatic volunteers and patients

被引:142
作者
Larheim, TA [1 ]
Westesson, PL
Sano, T
机构
[1] Eastman Dent Ctr, Rochester, NY 14620 USA
[2] Univ Oslo, Fac Dent, Dept Maxillofacial Radiol, N-0317 Oslo, Norway
[3] Univ Rochester, Sch Med & Dent, Dept Radiol, Div Neuroradiol, Rochester, NY 14642 USA
[4] Showa Univ, Sch Dent, Dept Oral Radiol, Tokyo 142, Japan
关键词
joints; abnormalities; MR; temporomandibular;
D O I
10.1148/radiology.218.2.r01fe11428
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
PURPOSE: To compare the prevalence and type of temporomandibular joint (TMJ) disk displacement in asymptomatic volunteers with those in patients. MATERIALS AND METHODS: Bilateral oblique sagittal and oblique coronal intermediate-weighted magnetic resonance (MR) images of the TMJs in 58 patients with pain and dysfunction were analyzed and compared with corresponding MR images of 62 asymptomatic volunteers. RESULTS: Forty-five (78%) of 58 patients had disk displacement compared with 22 (35%) of 62 asymptomatic volunteers. Complete disk displacement was found in 46 (40%) of 115 joints in patients compared with three (2.4%) of 124 joints in asymptomatic volunteers, whereas partial disk displacement occurred in 26 (22.6%) and 27 (21.8%) joints, respectively. Two types of complete disk displacement, anterolateral and anterior, occurred frequently in patients, seldom in volunteers. Only minor differences were found between other types of disk displacement when prevalence in patients was compared with that of volunteers. The disk reduced to a normal position on open-mouth images in all joints in the volunteers compared with 76% of the joints in patients. CONCLUSION: TMJ disk displacement was less prevalent and was of a different type in asymptomatic volunteers compared with patients with pain and dysfunction.
引用
收藏
页码:428 / 432
页数:5
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