The cross-section of high copper amalgam filled in epoxy tooth die was observed by a new type EPMA (CMA: Computer-aided Micro Analyzer or Comprehensive Multi Analyzer) that provides rapid analysis of a wide area (max. 80 mm×80 mm). Quantitative are analysis of Hg, Ag, Sn and Cu throughout the specimen was carried out in one process. This method has been difficult by conventional EPMA.
The intergration of a specific element was not found in any region of specimen. This CMA may be useful for analysis of dental materials.