Kodaira Hiroe, Ohno Kohachiro, Fukase Naoko, Kuroda Midori, Adachi Shiki, Kikuchi Motohiro, Asada Yoshinobu
Department of Pediatric Dentistry, Tsurumi University School of Dental Medicine, Yokohama, Japan.
J Oral Sci. 2013;55(2):161-5. doi: 10.2334/josnusd.55.161.
Preformed crowns for restoration of primary teeth are used in various treatments and are essential for restoring the crowns of primary molars. However, there are concerns that mechanical, chemical, and thermal stimulation may cause release of components of such crowns. We examined systemic accumulation of heavy metals associated with preformed crowns (3M Stainless Steel Primary Molar Crowns) used in primary tooth restoration. The participants were 37 children who had visited the Pediatric Dental Clinic of Tsurumi University Dental Hospital. They were divided into two groups: 22 participants without a history of being fitted with a preformed crown for primary tooth restoration (controls), and 15 participants with preformed crowns for primary tooth restoration. Analysis of hair samples showed a significant difference in the level of the trace element Cr - an important component of the preformed crowns - between children with and without preformed crowns, but no significant differences in Fe or Ni levels. Levels of the trace elements Ni, Cr, and Fe were within allowable ranges, indicating that these minerals were not likely to be harmful.
用于乳牙修复的预成冠在各种治疗中都有应用，对于恢复乳磨牙的牙冠至关重要。然而，人们担心机械、化学和热刺激可能会导致此类牙冠的成分释放。我们研究了与乳牙修复中使用的预成冠（3M不锈钢乳磨牙冠）相关的重金属在体内的蓄积情况。研究对象为37名曾就诊于鹤见大学牙科医院儿童牙科诊所的儿童。他们被分为两组：22名没有乳牙修复使用预成冠病史的参与者（对照组），以及15名有乳牙修复使用预成冠的参与者。头发样本分析显示，佩戴和未佩戴预成冠的儿童之间，微量元素铬（预成冠的一种重要成分）的水平存在显著差异，但铁或镍水平没有显著差异。微量元素镍、铬和铁的水平在允许范围内，表明这些矿物质不太可能有害。
