ABSTRACT Dental modifications, especially dental inlays, were one of the most characteristic biocultural traditions in Ancient Mesoamerica. The main objective of this brief report is to identify the raw material used to elaborate dental inlays in the archaeological site of Reynosa, located in the Southern Pacific Coast of Guatemala. The recent discovery of a massive burial, dated roughly in the Middle-Late Preclassic Period (500 BC–200 BC), put the site in the spotlight. There were found some of the earliest carriers of dental incrustations in Mesoamerica, which represent part of the beginning of the inlay tradition. The analytical method used to determine the raw material was scanning electron microscopy (SEM) with X-ray spectroscopy. The identified raw materials were pyrite and hematite. These findings have opened new concerns about the obtaining and the usage of those materials in this millennial tradition.

中文翻译：

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中古时代的中美牙嵌体：SEM-EDS对原材料的研究

摘要牙齿修饰，尤其是牙嵌体，是古代中美洲最有特色的生物文化传统之一。这份简短报告的主要目的是在危地马拉南太平洋海岸的雷诺萨（Reynosa）考古现场确定用于制作牙齿嵌体的原材料。最近发现的一个大型墓葬，大约可追溯到中古晚期（公元前500年至前200年），使该遗址备受关注。在中美洲发现了一些最早的牙垢携带者，这代表了镶嵌传统的开始。用于确定原料的分析方法是采用X射线光谱学的扫描电子显微镜（SEM）。确定的原料为黄铁矿和赤铁矿。