System for replacing a disc between two consecutive vertebrae (V1, V2) comprising at least one intervertebral cage (10) and an introduction guide (40) to introduce said intervertebral cage between the two vertebrae, said intervertebral cage (10) being constituted by an oblong body (11) delimited between two substantially flat opposite faces, said oblong body comprising at least two parts (11-1, 11-2) separated by a space (13), said space being defined along a curved axis (12) contained in a plane substantially parallel to the planes of the opposite faces and flowing through an opening (15) in a first end (14) of the oblong body (11) between said two parts (11-1, 11-2) of said oblong body , and being an introduction guide (40) constituted by at least one guide rod (50), characterized in that said introduction guide is further constituted: - by a curved longitudinal core (60) whose cross sections salts are substantially complementary to said space (13), so that they allow a respective sliding between said curved core and the two parts (11-1, 11-2) of said oblong body (11), - by means (70) for mounting a first end (61) of said curved soul (60) in cooperation with a first end (51) of said guide rod (50) so that said curved soul (60) protrudes with respect to this first end (51) of said guiding rod (50), and - by a pusher rod (80) mounted in displacement with respect to said guiding rod (50) so that it is suitable for contacting, by one (81) of its ends, against the first end (14) of the oblong body (11) to push said oblong body in translation relative to said curved soul (60).Sistema para sustituir un disco entre dos vértebras consecutivas (V1, V2) que comprende por lo menos una jaulaintervertebral (10) y una guía de introducción (40) para introducir dicha jaula intervertebral entre las dos vértebras,estando dicha jaula intervertebral (10) constituida por un cuerpo oblongo (11) delimitado entre dos caras opuestassustancialmente planas, comprendiendo dicho cuerpo oblongo
