Oral environment and the accumulation level of heavy metal in the Scalp Hair

口腔环境与头皮重金属积累水平

• 批准号: 20791596
• 负责人: KODAIRA Hiroe
• 金额: $ 1.25万
• 依托单位: Tsurumi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20791596/
• 关键词: 広汎性発達障害; 成長発育; 毛髪中微量元素濃度; 既製乳歯冠; 毛髪検査; 成長・発育; 成長・発達

Ingredients of preformed metal crown for the primary teeth are iron 65-74%, chromium 17-19% and nickel 9-13%. It has been considered that preformed crown for the primary teeth is apt to liquate the ingredients by attrition, abrasion or chemical stimuli in oral cavity than cast crown for permanent teeth. In the children who had kept on a preformed metal crown for the primary teeth, there was statistically significantly higher iron accumulation level in the scalp hair, than the children who had passed more than a half year after removal or exfoliation of preformed metal crown.

一种乳牙金属预成冠，其成分为：铁65- 74%，铬17-19%，镍9- 13%。乳牙预成冠比恒牙铸造冠更易因口腔内的磨擦、磨损或化学刺激而使成分液化。保留乳牙金属冠的儿童，其头皮头发中的铁积累水平显著高于去除或剥脱金属冠半年以上的儿童。