Total Disc ReplacementIntervertebral DiscProsthesis ImplantationLumbar VertebraeDiskectomyArthroplasty, ReplacementProstheses and ImplantsIntervertebral Disc DegenerationIntervertebral Disc DisplacementSpinal FusionJoint ProsthesisRange of Motion, ArticularCervical VertebraeArthroplastySpondylosisWeight-BearingProsthesis DesignLow Back PainBiomechanical PhenomenaDental ImplantsLongitudinal LigamentsTreatment OutcomeSacrumZygapophyseal JointFailed Back Surgery SyndromeRadiculopathyDrug ImplantsCompressive StrengthReoperationPostoperative Complications