PROBLEM TO BE SOLVED: To provide a component for a prosthetic hip joint capable of suppressing destruction of myeloid cells in the thighbone, and capable of being properly used for artificial joint replacement that enables achieving early regeneration of the myeloid cells after surgery.SOLUTION: A component 10 for a prosthetic hip joint includes a body part 14 for supporting a femoral head ball 12, and an insertion part 16 formed integrally with the body part 14 and having a diameter smaller than the body part 14. In an outer face of the insertion part 16, a fitting surface 17 of a shape substantially matching an inner surface shape of an opposed medullary cavity 60 when inserted into the inside of a thighbone 50 is provided over a circumferential direction. Also, the body part 14 and the insertion part 16 are configured by a porous structure with a lot of cavities in communication with the outside through an opening 32 formed in the tip of the insertion part 16.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】大腿骨内の骨髄細胞の破壊を抑制し、術後において早期に骨髄細胞の再生を図ることが可能な人工関節置換術に好適に用いることができる人工股関節用部品を提供する。【解決手段】人工股関節用部品１０は、骨頭ボール１２を支持する本体部１４と、本体部１４と一体に形成され、本体部１４よりも細径の挿入部１６と、を備えている。挿入部１６の外面には、大腿骨５０の内部に挿入された際に対向する髄腔６０の内面形状と略一致する形状の嵌合面１７が周方向に亘って設けられている。また本体部１４及び挿入部１６は、挿入部１６の先端に形成された開口３２を通じて外部と連通する空隙を多数備えたポーラス構造体で構成されている。【選択図】図１
