Patent ID: 8974533
Filing Date: 2015-03-10
Classification: A61F

Abstract:
1. A prosthetic disc for insertion between adjacent vertebrae, the prosthetic disc comprising: upper and lower plates having outer surfaces locatable against the respective vertebrae, and inner surfaces, wherein at least one of the inner surfaces of the upper and lower plates is a curved inner surface; a rigid mobile core removably disposed between the inner surfaces of the upper and lower plates, the core arranged to slide and translate with respect to both the upper and lower plates when the prosthetic disc is implanted; a rigid restraining structure on at least one of the plates; and at least two lips formed on the mobile core, at least one of the lips engaging the restraining structure to hold an outermost periphery of the core captive between the plates and within the rigid restraining structure during sliding movement of the plates over the core when the prosthetic disc is implanted.