The kinematics principle of the Mobidisc® prosthesis is to restore the static of the lumbar spine by restoring the physiological mobility of the targeted disc space. The self-centering mobile insert allows to respect the instantaneous rotation centers, and also to give back to the treated intervertebral segment it’s natural physiological movement. The operating technique and the instrumentation specifically developed for the Mobidisc® implant offer a guarantee of security, reliability, and simplicity of implantation, in order to insure the reproducibility of the surgical act for the well being and comfort of the patient.