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US 8,801,761 B2Granted
Spinal implant locking member with improved guidance, tactile and visual feedback
AssigneeX-spine Systems, Inc.
InventorDavid Louis Kirschman
Life of this patent
Estimating the term…
Abstract
An implant having a receiver that is adapted to receive a polyaxial screw in the bore and either an internal or external cap. The cap can be an external or internal cap and the implant further has at least one locking aid in the form of at least one of a tactile feedback, a visual feedback or an enhanced fixation between the cap and a rod that is received in the receiver.
Claims67
An implant comprising:
- a receiver having at least one internal wall defining a bore, at least a portion of said receiver having a receiver thread, said receiver further comprising a rod-receiving channel in communication with said bore, said rod-receiving channel being adapted to receive a rod;
- a polyaxial screw for receipt in said bore;
- a cap having a cap thread for mating with said receiver thread to permit said cap to be screwed on said receiver in order to lock said rod in said rod-receiving channel of said receiver;
- and
- a lock aid associated with at least one of said receiver or said cap;
- said lock aid comprising an indicia generally aligned with a leading edge of said cap thread or said receiver thread;
- at least one of said receiver thread or said cap thread being defined by a male thread, a leading portion of said male thread being truncated or cut out to provide at least one of a tactile or a visual feedback;
- wherein said cap comprises a deformable area adapted to provide said lock aid, said deformable area engaging said rod and deforming on it after said rod is received in said receiver and said cap is rotated and screwed on said receiver;
- wherein said male thread and said deformable area are monolithic and are integrally formed in a rod-engaging end of said cap.
6 more elements
An implant cap for mounting on an implant receiver that receives and supports a rod in a rod-receiving area of said implant receiver and that has receiver threads, said implant cap comprising:
- a body having an area for receiving a tool for rotatably driving said implant cap;
- a cap thread for cooperating with said receiver thread to permit said implant cap to be screwed and mounted on or in said implant receiver in order to lock said rod in the rod-receiving area of said implant receiver;
- and
- a lock aid comprising an indicia on said implant cap generally aligned with a leading edge of said cap thread;
- said cap thread being defined by a male thread, a leading portion of said male thread being truncated or cut out to provide at least one of a tactile feedback or visual feedback;
- wherein said implant cap comprises a deformable area adapted to provide said lock aid, said deformable area engaging said rod and deforming on it after said rod is received in said receiver and said implant cap is rotated and screwed on said receiver;
- wherein said male thread and said deformable area are monolithic and integrally formed in a rod-engaging end of said implant cap.
4 more elements
An implant comprising:
- a receiver having a at least one internal wall defining a bore, at least a portion of said receiver having a receiver thread, said receiver further comprising a rod-receiving channel in communication with said bore, said rod-receiving channel being adapted to receive a rod;
- a polyaxial screw for receipt in said bore;
- a cap having a cap thread for mating with said receiver thread to permit said cap to be screwed on said receiver in order to lock said rod in said rod-receiving channel of said receiver;
- and
- said receiver thread is defined by a female thread, a leading portion of said female thread being truncated or cut out
- an indicia on said cap, said indicia being generally aligned with a leading edge of said cap thread;
- said cap thread being defined by a male thread, a leading portion of said male thread being truncated or cut out to provide at least one of a tactile feedback or a visual feedback;
- wherein said cap comprises a deformable area adapted to provide a lock aid, said deformable area engaging said rod and deforming on it after said rod is received in said receiver and said cap is rotated and screwed on said receiver;
- wherein said male thread and said deformable area are monolithic and integrally formed in a rod-engaging end of said cap.
6 more elements
An implant comprising:
- a receiver having at least one internal wall defining a bore, at least a portion of said receiver having a receiver thread, said receiver further comprising a rod-receiving channel in communication with said bore, said rod-receiving channel being adapted to receive a rod;
- a polyaxial screw for receipt in said bore;
- a cap having a cap thread for mating with said receiver thread to permit said cap to be screwed on said receiver in order to lock said rod in said rod-receiving channel of said receiver;
- and
- said cap comprising a surface for facilitating guiding said cap on said receiver and aligning said cap thread with said receiver thread so that said cap can be screwed on said receiver;
- wherein said cap comprises a deformable area that is monolithic or integral with said cap and that is adapted to engage said rod and deform on it after said rod is received in said receiver and said cap is screwed on said receiver;
- wherein said surface is frusto-conical or semi-spherical and comprises said deformable area that is monolithic or integral therewith.
4 more elements
An implant comprising:
- a receiver having a at least one internal wall defining a bore, at least a portion of said receiver having a receiver thread, said receiver further comprising a rod-receiving channel in communication with said bore, said rod-receiving channel being adapted to receive a rod;
- a polyaxial screw for receipt in said bore;
- and
- a cap having a cap thread for mating with said receiver thread to permit said cap to be screwed on said receiver in order to lock said rod in said rod-receiving channel of said receiver;
- said cap comprises a deformable area adapted to engage said rod and deforming on it after said rod is received in said receiver and said cap is screwed on said receiver;
- wherein said deformable area and said cap thread are monolithically or integrally formed in said cap so that said cap thread and said deformable area are a one-piece construction.
3 more elements
An implant comprising:
- a receiver having a at least one internal wall defining a bore, at least a portion of said receiver having a receiver thread, said receiver further comprising a rod-receiving channel in communication with said bore, said rod-receiving channel being adapted to receive a rod;
- a polyaxial screw for receipt in said bore;
- and
- a cap having a cap thread for mating with said receiver thread to permit said cap to be screwed on said receiver in order to lock said rod in said rod-receiving channel of said receiver;
- said cap comprises a deformable area adapted to engage said rod and deforming on it after said rod is received in said receiver and said cap is screwed on said receiver;
- wherein said deformable area is monolithically or integrally formed in said cap so that said cap thread and said deformable area are a one-piece construction;
- wherein said deformable area becomes cold welded on said rod when said cap has been screwed on said receiver in less than or equal to one revolution after initial rod contact.
4 more elements
Dependencies are inferred from the claim text.