Total Disc ReplacementIntervertebral DiscProsthesis ImplantationLumbar VertebraeArthroplasty, ReplacementProstheses and ImplantsDiskectomyIntervertebral Disc DegenerationIntervertebral Disc DisplacementJoint ProsthesisSpinal FusionRange of Motion, ArticularCervical VertebraeProsthesis DesignArthroplastySpondylosisWeight-BearingLongitudinal LigamentsLow Back PainBiomechanical PhenomenaDental ImplantsTreatment OutcomeSacrumZygapophyseal JointFailed Back Surgery SyndromeRadiculopathyDrug ImplantsReoperationBerlinDevice RemovalCompressive Strength