The present invention is an implantation system for embedding an implantation portion between an upper joint and a lower joint. The implantation system includes first and second joint implantation parts. The first joint embedding unit has a first joint surface and a first engagement surface at a position facing the first joint surface. The first joint embedding portion has a front edge, a rear edge, and teeth extending from the first engagement surface, the teeth form a plurality of rows, and teeth in rows adjacent to each other are shifted from each other, The second joint implant has a second joint surface and a second engagement surface at a position facing the second joint surface, and the second joint implant extends from the second engagement surface. Have teeth.本発明は、埋込部を上関節と下関節間に埋め込むための埋込システムである。この埋込システムは、第１、第２関節埋込部を含む。第１関節埋込部は第１関節面と、この第１関節面に対向する位置の第１係合面とを有する。第１関節埋込部は前縁と後縁と、上記第１係合面から延びる歯を有し、この歯が複数の列をなし、互に隣接する列の歯が互にずれており、第２関節埋込部が、第２関節面と、この第２関節面に対向する位置の第２係合面とを有し、上記第２関節埋込部が上記第２係合面から延びる歯を有する。
