The aforementioned materials used to manufacture KYPHON™ ActivOs™Bone Cement with Hydroxyapatite are non-metallic, non-conducting materials. As such, there are no concerns with the performance of KYPHON™ ActivOs™ Bone Cement with Hydroxyapatite in an MRI environment, and this device can be justifiably labeled as MR-Safe per ASTM F2503.