An epidemiologic examination was carried out to reveal the prevalence of the periodontal diseases and oral pigmentation in patients with Yusho 30 years after PCBs exposure. The results obtained were as follows. 1) 69 patients out of 71 patients with Yusho, who were measured periodontal pocket depth using Ramfjord' methods, had at least one tooth with periodontal pocket deeper than 3 mm. Similarly, 241 teeth out of a total 348 examined teeth showed periodontal pocket with more than 3 mm depth. 2) Oral pigmentation was observed in 46 out of 79 patients with Yusho. In this study, gingival pigmentation was most predominant among oral pigmentation. In addition, it is of particular interest that oral pigmentation tended to be observed at a much higher frequency in younger patients with Yusho.
|Number of pages||4|
|Journal||Fukuoka igaku zasshi = Hukuoka acta medica|
|Publication status||Published - Jan 1 1999|
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