PROTHESE DE DISQUE INTERVERTEBRAL

The invention relates to an intervertebral disc prosthesis (2) that comprises first and second rigid half-envelopes (3, 4) in the form of plates, each intended to be secured to one of the two vertebrae adjacent to the intervertebral disc to be replaced. The first half-envelope (3) includes a central tubular part (5) oriented towards the second half-envelope, while the second half-envelope (4) includes a central stud (6) having a cross-section smaller than that of the tubular part, said stud being oriented towards the first half-envelope and inserted in the tubular part. According to the invention, the intervertebral disc prosthesis further comprises a compression pad (7) disposed between the two half-envelopes, including in the space between the tubular part and the stud. The compression pad (7) comprises a central portion (8) extending between the central areas of the first and second half-envelopes (3, 4), and a plurality of branches (9, 10) extending perpendicularly from the central portion (8) and angularly offset relative to each other.