As for this invention, it regards in plant which has the base substance which is produced with the living body corrosiveness magnesium alloy. The multiple grains where this magnesium alloy, Y, ZR, Mn, Sc, Fe, Ni, Co, W and the Pt element and one inside your earths which possess atomic number 57 - 71 or includes multiple, or, one among the elements which refer or includes the alloy or the chemical compound which contains multiple and distributes statistics are contained. Mean distance of these grains is smaller than as many as 100 times that mean particle diameter.本発明は、生体腐食性マグネシウム合金でできた基体を備えるインプラントに関する。このマグネシウム合金は、Y、ZR、Mn、Sc、Fe、Ni、Co、W、Pt元素及び57~71の原子番号を有する貴土類のうちの1つ又は複数を含むか、又は、言及した元素のうちの1つ又は複数を含有する合金又は化合物を含む統計学的に分散された複数の粒子を含有する。これらの粒子同士の平均距離は、平均粒子径の100倍よりも小さい。
