Patent ID: 11957598
Assignee: LDR MEDICAL
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A motion preserving disc prosthesis comprising:
an upper plate including upper and lower surfaces;
a lower plate including upper and lower surfaces; and
a core engaging the lower surface of the upper plate and the upper surface of the lower plate, wherein at least one engaging surface of the core comprises at least one dummy hole intersecting a plurality of grooves radiating outwardly from the at least one dummy hole to facilitate engagement of the core with an adjacent portion of the upper or lower plate in response to movement by a patient, wherein the plurality of grooves are interconnected via the at least one dummy hole,
wherein the at least one dummy hole passes through only a portion of the core, wherein the at least one engaging surface of the core includes an upper surface of the core and the adjacent portion of the upper or lower plate is the lower surface of the upper plate, wherein engaging portions of the upper surface of the core and the lower surface of the upper plate are each substantially flat and wherein each of the plurality of grooves extends from the at least one dummy hole to a peripheral edge of the engaging portion of the upper surface of the core.