Please consult your physician to discuss any concerns that you may have regarding metal allergies. The metallic components of the M6-C artificial disc are manufactured from medical grade titanium alloy – Titanium 6Al-4V (ASTM F1472 Standard Specification for Wrought Titanium-6Aluminum-4Vanadium Alloy for Surgical Implant Applications) and commercially pure titanium (ASTM F1580 Standard Specification for Titanium and Titanium-6 Aluminum-4 Vanadium Alloy Powders for Coating of Surgical Implants).
Further information regarding ASTM Standards can be found online at: https://www.astm.org/industry/health-care-and-medical-devices-standards.html. These standards describe the constituent element and alloy composition allowed in the metal. While the titanium material used to make the disc is biocompatible and has been used in other medical implants for many years, there is no guarantee that anyone susceptible to metal allergies will not experience a problem.