Intervertebral implant (1) comprising (i) a first elongated implant member (20) with a longitudinal axis (221), an upper surface (222) and a lower surface (223) for apposition to the endplates of two adjacent vertebrae, and with a lateral circumferential surface (224) and (ii) a second elongated implant member (30) with a longitudinal axis (321), an upper surface (322) and a lower surface (323) for apposition to the same endplates and with a lateral circumferential surface (324). Said elongated implant members (20, 30) are rotatably coupled to a central body (10) for rotation in a central plane (101 essentially parallel to said upper and lower surfaces. Further, a) said first and second elongated implant members (20, 30) comprise each an inner end portion (225；325) which comprises a segment of a toothed wheel (220；320) with gear teeth (23；33) and with an axis of rotation (227；327) essentially orthogonal to the central plane of the intervertebral implant； and a free outer portion (226；326)； and whereby said free outer portions (226；326) of said first and second elongated implant members (20, 30) are rotatable around the axis of rotation (227；327) of the segment of a toothed wheel (220；320) of their respective inner end portions (225；325).L'invention concerne un implant vertébral extensible (1) comprenant deux éléments d'implant allongés (20, 30). Les éléments d'implant (20, 30) sont couplés de façon rotative à une partie de base centrale (10) et comprennent une première extrémité comportant un axe de rotation et des dents d'engrenage (23, 33) disposées à la périphérie. Les dents d'engrenage (23) du premier élément d'implant allongé (20) sont imbriquées dans lesdites dents d'engrenage (33) du second élément d'implant allongé (30).
