The bryan cervical disc is a metal-on-polymer implant with some elastic properties and a relatively mobile center of rotation.The prestige disc was designed with a ball-socket stainless steel articulation.The pro disc-C is a semi constrained metal-polyethylene design allowing pure rotary motion that may stress the facet joints.Although there are no long-term data available yet, these three cervical prostheses appear promising in the non fusion treatment of cervical degenerative disc disease.