(J Korean Assoc Oral Maxillofac Surg 2011;37:510-4) An intracapsular and pericapsular infection of the temporomandibular joint (TMJ) is rare. The invasion of bacteria into the joint space can occur through several routes. Among them, hematogenous spread is most common. This report describes three cases of abscess formation in the TMJ (intracapsular and pericapsular infection). The patients were treated with supportive care and surgical intervention (incision and drainage) under hospitalization, and their symptoms had improved. Pain of the TMJ is a typical symptom of temporomandibular joint disorders (TMD). On the other hand, an infection of the TMJ can also cause pain on the affected side, and can be misdiagnosed as routine TMD. Therefore, the possibility of an infection of the TMJ cavity should be considered when treating TMD.Key words: Infection, Temporomandibular joint, Temporomandibular joint disorders, Septic arthritis [paper submitted 2011. 6. 20 / revised 2011. 9. 6 / accepted 2011. 10. 12] infection' for convenience in this report. TMJ infection is required to be carefully examined since its initial symptoms start from pain and limitation of jaw movement similary to common temporomandibular joint disorders (TMD). Failure to initially diagnose TMJ infection may results in aggravation of symptoms and development of complications.This report describes three cases of TMJ infection which were successfully treated.
II. Cases report
Case 1A 46-year-old male visited the emergency room complaining of severe pain on left preauricular region and difficulty of jaw movement. The patient stated that he visited other hospital for the chief complaints of pain around the left TMJ before 5 days. He didn't get any examination there. He was diagnosised as common TMD and received some medications and instruction of mouth opening exercise. But the symptoms were aggravated with severe pain thereafter and visited our hospital. In physical examination, erythematous edema was observed at the left preauricular region, and the patient had a sense of induration