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Updated: May 9, 2026
Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
[A clinical study of TMJ arthrosis in Yusho patients]
Goro Kawasaki1, Izumi Yoshitomi, Masahiro Umeda
1Department of Clinical Oral Oncology, Unit of Translational Medicine, Nagasaki University Graduate School of Biomedical Sciences, Japan. gkawa@nagasaki-u.ac.jp
Abstract:
In the present study, we clarified the TMJ symptoms of Yusho patients. An epidemiologic examination was carried out to identify TMJ arthrosis in patients with Yusho. The patients were collected during annual Yusho examinations in 2012. Nine of 187 patients had TMJ symptoms. The symptoms were pain, trismus, and a clicking sound of the TMJ. We diagnosed these patients with TMJ arthrosis. The rate of TMJ arthrosis in Yusho patients was 4.8%, being similar to the rate of TMJ arthrosis in general. The PCB concentration in the blood of these 9 patients was 2.76 ppb, and the average blood PCB concentration of all patients was 2.98 ppb. We identified no relationship between the blood PCB concentration and TMJ arthrosis.
