Back to results
US 2006/0136061 A1Published application
Artificial disc prosthesis
AssigneeTheken Disc, LLC
InventorsRichard Navarro, Bharadwaj Ananthan, Randall Theken
Life of this patent
Estimating the term…
Abstract
A visco-elastic motion-limiting artificial intervertebral disc prosthesis is provided that mimics the physiologic function of a normal spinal disc. The disc comprises upper and lower endplates having therewithin channels or openings for optionally receiving one or more motion-limiting members fitted on each end with an enlarged portion. One or more compression stops is provided between the upper and lower endplates. Additionally, an elastomeric cushion is disposed between the endplates and surrounds the motion-limiting members. Also, force transducers and microelectronics can be utilized to provide data to the surgeon or the patient regarding the load state of the disc.
Claims114
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening;
- a first projection extending from said lower surface of said first endplate terminating in a first distal end;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening;
- a second projection extending from said upper surface of said second endplate and substantially aligned with said first projection, said second projection terminating at a second distal end to form a gap having a predetermined distance between said first distal end and said second distal end;
- at least one motion-limiting member received respectively in said at least one opening of said first endplate and said second endplate, said at least one motion-limiting member linking said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- and
- a visco-elastic cushion interposed between said first endplate and said second endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first endplate and said second endplate through which said motion-limiting member may pass, and said at least one cavity surrounding said first and second projections.
4 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface;
- a first projection extending from said lower surface of said first endplate terminating in a first distal end;
- a second endplate having an upper surface and a lower surface;
- a second projection extending from said upper surface of said second endplate and substantially aligned with said first projection, said second projection terminating at a second distal end to form a gap having a predetermined distance between said first distal end and said second distal end;
- and
- a visco-elastic cushion interposed between said first and second endplates further comprising a cavity for receiving said first and second projections.
3 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening;
- at least one motion-limiting member received respectively in said at least one opening of said first and second endplates, said at least one motion-limiting member connecting said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- and
- a visco-elastic cushion between said lower surface of said first endplate and said upper surface of said second endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first and second endplates through which said at least one motion-limiting member may respectively pass.
2 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening;
- a projection extending from said upper surface of said second endplate terminating at a distal end to form a gap in an unloaded condition between said lower surface of said first endplate and said distal end;
- at least one motion-limiting member received respectively in said at least one opening of said first endplate and said second endplate, said at least one motion-limiting member linking said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- and
- a visco-elastic cushion interposed between said first endplate and said second endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first endplate and said second endplate through which said motion-limiting member may pass.
3 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a first projection extending from said lower surface of said first endplate terminating in a first distal end;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a second projection extending from said upper surface of said second endplate and at least partially aligned with said first projection, said second projection terminating at a second distal end to form a gap having a predetermined distance between said first distal end and said second distal end;
- at least one motion-limiting member received respectively in said at least one opening of said first endplate and said second endplate, said at least one motion-limiting member linking said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- a visco-elastic cushion interposed between said first endplate and said second endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first endplate and said second endplate through which said motion-limiting member may pass;
- and
- a force or pressure transducer located within the prosthesis for allowing the measurement and transmittal of the load experienced by the prosthesis.
5 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a first projection extending from said lower surface of said first endplate terminating in a first distal end;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a second projection extending from said upper surface of said second endplate and substantially aligned with said first projection, said second projection terminating at a second distal end to form a gap having a predetermined distance between said first distal end and said second distal end;
- at least one motion-limiting member received respectively in said at least one opening of said first endplate and said second endplate, said at least one motion-limiting member linking said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- and
- a polymeric cushion interposed between said first endplate and said second endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first endplate and said second endplate through which said motion-limiting member may pass and at least one cavity surrounding said first and second projections.
4 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface;
- a first projection extending from said lower surface of said first endplate terminating in a first distal end;
- a second endplate having an upper surface and a lower surface;
- a second projection extending from said upper surface of said second endplate and substantially aligned with said first projection, said second projection terminating at a second distal end to form a gap having a predetermined distance between said first distal end and said second distal end;
- and
- a polymeric cushion interposed between said upper and lower endplates further comprising a cavity for receiving said first and second projections.
3 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening for receiving at least one motion-limiting member;
- at least one motion-limiting member received respectively in said at least one opening of said first and second endplates, said at least one motion-limiting member connecting said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- and
- a visco-elastic cushion between said lower surface of said upper endplate and said upper surface of said lower endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first and second endplates through which said at least one motion-limiting member may respectively pass.
2 more elements
An artificial intervertebral disc prosthesis having an anterior portion and a posterior portion, comprising:
- a first endplate having an upper surface and a lower surface, said first endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a second endplate having an upper surface and a lower surface, said second endplate further comprising at least one opening for receiving at least one motion-limiting member;
- a projection extending from said upper surface of said second endplate and substantially aligned with said first projection, said projection terminating at a distal end to form a gap having a predetermined distance between said lower surface of said first endplate and said distal end;
- at least one motion-limiting member received respectively in said at least one opening of said first endplate and said second endplate, said at least one motion-limiting member linking said first endplate to said second endplate and allowing only a predetermined amount of movement of said first endplate relative to said second endplate;
- and
- a polymeric cushion interposed between said first endplate and said second endplate, further comprising therein at least one cavity in substantial alignment with said at least one opening in said first endplate and said second endplate through which said motion-limiting member may pass.
3 more elements
Dependencies are inferred from the claim text.