The medical implant (1) according to the present invention comprises a first, generally elongate portion (20) extending along the longitudinal axis A, intended to be inserted into the first bone (P1) and comprising first attachment means (24), and a second, also elongate, portion (30) following another longitudinal axis B, intended to be inserted into the second bone (P2) and comprising second attachment means (34), wherein said first and second portions (20, 30) are connected together via a connecting bridge (40) which is centered about the orthonormal axes X, Y, Z of said implant (1), providing for at least one axial offset of the second portion (30) with respect to the first portion (20) such that the longitudinal axis B of the second portion (30) is positioned in at least one direction forming an angle (α) relative to the longitudinal axis A of the first portion (20), and is offset by at least a certain distance along at least one of the axes XX', YY' and ZZ' of the connecting bridge (40) in order to avoid any offset between the outer upper portions of the first bone (P1) and the second bone (P2).
