Miyauchi Kazuki, Sano Kazuo, Nagai Masanori, Ogasawara Toshiyuki, Nakamura Mikiko, Kitagawa Yoshimasa, Kawamura Yasutaka
Division of Dentistry and Oral Surgery, Department of Sensory and Locomotor Medicine, School of Medicine, University of Fukui, Matsuoka, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006 Jun;101(6):e101-5. doi: 10.1016/j.tripleo.2005.10.048. Epub 2006 Mar 20.
We report an unusual case of occult fractures of the articular eminence and glenoid fossa due to a previous traffic accident presenting as a temporomandibular disorder. A 24-year-old Japanese man was referred for trismus and pain in the right temporomandibular joint, and was suspected of having temporomandibular disorder. Although the magnetic resonance image did not show displacement of the articular disk, T2-weighted images revealed disruption of the cortical low-intensity line of the right articular eminence. On a computerized tomography (CT) scan, an isolated bone fragment of the right articular eminence was clearly seen, and fractures of the right glenoid fossa and articular eminence were noted. The patient was treated by instructing him not to open his mouth widely and to remain on a soft diet for 4 weeks. A CT examination performed 1 year after the treatment showed complete healing of the fracture in the right articular eminence and glenoid fossa.
我们报告一例因既往交通事故导致的关节结节和关节盂隐匿性骨折，表现为颞下颌关节紊乱症的罕见病例。一名24岁的日本男性因右颞下颌关节牙关紧闭和疼痛前来就诊，怀疑患有颞下颌关节紊乱症。尽管磁共振成像未显示关节盘移位，但T2加权图像显示右关节结节皮质低强度线中断。在计算机断层扫描（CT）上，可以清晰地看到右关节结节的孤立骨碎片，同时发现右关节盂和关节结节骨折。患者接受的治疗是指示其不要大口张口，并持续4周食用软食。治疗1年后进行的CT检查显示，右关节结节和关节盂骨折已完全愈合。
