It can recover functional glenoid dynamics effectively, can reconstruct, the semi- glenoid formation in plant of the first metacarpus base of CMC joint (11) by the artificial joint is created. In plant (11) the unique head section (13) it possesses, as for this head section, the spherical head section glenoid surface which is received into the cavity which was formed to the large rhombus bone surgically (19) with it constructs the cross relationship of specification, the neck of support of concave condition field (21) the abbreviation elliptical color (15) joins the head section with the flat shape.機能的関節力学を有効に回復し、再建できる、CMC関節の第一中手骨基部の半関節形成インプラント(11)による人工関節が創出される。インプラント(11)は特異なヘッド部(13)を有し、このヘッド部は、大菱形骨に外科的に形成された窩洞内に受けられる球状ヘッド部関節面(19)との特定の相互関係を構築し、凹状領域の支持用ネック部(21)はヘッド部を平形で略楕円形のカラー(15)に結合する。
