Implant for Bone

Abstract

The present invention is an implant for bone. The current implant is particularly useful in spinal surgical procedures.

Claims

1) A spinal implant adapted for interconnection with a device distinct from the spinal implant; the spinal implant comprising: a) a solid extension comprising a first end and a second end opposite the first end; b) the first end of the solid extension further comprising a polyaxial head mounted to the first end, wherein the polyaxial head is adapted for connection with the device distinct from the spinal implant; and c) a surgical blade comprising: i) an arcuate side wider than a diameter of the second end of the solid extension, wherein the solid extension extends along a longitudinal axis of the spinal implant in a direction away from the surgical blade; ii) a straight side opposite the arcuate side; the straight side of a lesser length than the arcuate side; iii) first and second converging edges connected with the arcuate side and converging toward each other as the first and second converging edges approach the straight side; and iv) an aperture proximate the center of the surgical blade; the aperture, positioned between the first and second converging edges, opening to opposed sides of a surgically created space.

2) The spinal implant of claim 1, wherein the surgical blade and the solid extension are uniform and the first wing and the second wing are arched away from the first end of the solid extension.

3) The spinal implant of claim 2, wherein the polyaxial head comprises an outer housing and a threaded inward receptacle adapted to receive the device distinct from the spinal implant.

4) The spinal implant of claim 3 comprising a first transition edge connected to the first converging edge and the straight side and a second transition edge connected to the second converging edge and the straight side.

5) A spinal implant adapted for interconnection with a device distinct from the spinal implant; the spinal implant comprising: a) a solid extension comprising a first end and a second end opposite the first end; b) the first end of the solid extension further comprising a polyaxial head mounted to the first end, wherein the polyaxial head is adapted for connection with the device distinct from the spinal implant; c) a surgical blade comprising: i) a slanted side relative to and wider than a diameter of the second end of the solid extension; the solid extension extending along a longitudinal axis of the spinal implant in a direction away from the surgical blade, wherein the slanted side comprises a first wing positioned on a first side of the solid extension and a second wing positioned on a second side of the solid extension; ii) a straight side opposite the slanted side; the straight side of a lesser length than the slanted side; iii) first and second converging edges connected with the slanted side and converging toward each other as the first and second converging edges approach the straight side; and iv) an aperture proximate the center of the surgical blade; the aperture, positioned between the first and second converging edges, opening to opposed sides of a surgically created space.

6) The spinal implant of claim 4, wherein the surgical blade and the solid extension are uniform.

7) The spinal implant of claim 6, wherein the slanted side intersects with the longitudinal axis of the solid extension at angles other than perpendicular.

8) The spinal implant of claim 7, wherein either the first wing or the second wing is arcuate.

9) The spinal implant of claim 8, wherein the polyaxial head comprises an outer housing and a threaded inward receptacle adapted to receive the device distinct from the spinal implant.

10) The spinal implant of claim 9 comprising a first transition edge connected to the first converging edge and the straight side and a second transition edge connected to the second converging edge and the straight side.

11) A spinal implant adapted for interconnection with a device distinct from the spinal implant; the spinal implant comprising: a) a cylindrical extension comprising a first end and a second end opposite the first end; and b) a surgical blade comprising: i) an arcuate side wider than a diameter of the second end of the cylindrical extension, wherein the arcuate side comprises first and second opposed wings and the cylindrical extension extends away from the surgical blade along a longitudinal axis of the surgical implant; ii) a straight side opposite the arcuate side; the straight side of a lesser length than the arcuate side, wherein the longitudinal axis of the spinal implant extends though the straight side and the cylindrical extension; iii) first and second converging edges connected with the arcuate side and converging toward each other as the first and second converging edges approach the straight side; and iv) an aperture proximate the center of the surgical blade; the aperture, positioned between the first and second converging edges, opening to opposed sides of a surgically created space.

12) The spinal implant of claim 11, wherein the surgical blade and the cylindrical extension are uniform and the first wing and the second wing are arched away from the first end of the cylindrical extension.

13) The spinal implant of claim 12 comprising a polyaxial head connected to the first end of the cylindrical extension; the polyaxial head adapted for connection with the device distinct from the spinal implant.

14) The spinal implant of claim 13 comprising a first transition edge connected to the first converging edge and the straight side and a second transition edge connected to the second converging edge and the straight side.

15) A spinal implant adapted for interconnection with a device distinct from the spinal implant; the spinal implant comprising: a) a cylindrical extension comprising a first end and a second end opposite the first end; and b) a surgical blade comprising: i) a slanted side relative to and wider than a diameter of the second end of the cylindrical extension and connected to the second end of the cylindrical extension, wherein the slanted side comprises a first wing positioned on a first side of the cylindrical extension and a second wing positioned on a second side of the cylindrical extension; ii) a straight side opposite the slanted side; the straight side of a lesser length than the slanted side, wherein a longitudinal axis of the cylindrical extension extends through the straight side; iii) first and second converging edges connected with the slanted side and converging toward each other as the first and second converging edges approach the straight side; and iv) an aperture proximate the center of the surgical blade; the aperture, positioned between the first and second converging edges, opening to opposed sides of a surgically created space.

16) The spinal implant of claim 15, wherein the surgical blade and the cylindrical extension are uniform.

17) The spinal implant of claim 16, wherein the slanted side intersects with the longitudinal axis of the cylindrical extension at angles other than perpendicular.

18) The spinal implant of claim 17, wherein either the first wing or the second wing is arcuate.

19) The spinal implant of claim 18 comprising a polyaxial head comprising an outer housing and a threaded inward receptacle adapted to receive the device distinct from the spinal implant.

20) The spinal implant of claim 19 comprising a first transition edge connected to the first converging edge and the straight side and a second transition edge connected to the second converging edge and the straight side.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a perspective of a first preferred embodiment of the implant.

[0026] FIG. 2 is a perspective of a first preferred embodiment of the implant.

[0027] FIG. 3 is a perspective of a second preferred embodiment of the implant.

[0028] FIG. 4 is a perspective of a second preferred embodiment of the implant.

[0029] FIG. 5 is a perspective of a third preferred embodiment of the implant.

[0030] FIG. 6 is a perspective of a third preferred embodiment of the implant.

[0031] FIG. 7 is a perspective of a fourth preferred embodiment of the implant.

[0032] FIG. 8 is a perspective of a fourth preferred embodiment of the implant.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Although the disclosure hereof is detailed to enable those skilled in the art to practice the invention, the embodiments published herein merely exemplify the present invention.

[0034] In the most general sense, the present invention is an implant for bone where the implant is adapted for connection with a device distinct from the implant. Among other things, the current invention can be adapted for use with vertebra or other bone tissues. The present implant is particularly adapted for use in the cervical region of the spine. Dispersion of adhesives from the windows or openings of the surgical incision before closing the surgical wound, reduces the risk of the fastener backing out of the wound prior to the fastener fully interlocking with tissue overgrowth. Polymethymethacrylate is an adhesive particularly well suited for use with the current fastener.

[0035] Preferred embodiments of the present invention are manufactured of titanium alloys, stainless steel, non-resorbable polymers or any other composition acceptable in the art. Within the scope of the present invention, it has advantageously been discovered that cylindrical extension (40) can have lengths from about 2 to about 10 millimeters; polyaxial heads (50) can have lengths of from about 5 millimeters to about 25 millimeters; sockets (54) of polyaxial heads (50) can have depths from about 3 millimeters to about 23 millimeters, diameters from about 4 millimeters to about 20 millimeters, lateral openings widths (62, 64) from about 3 millimeters to about 10 millimeters; and blades (80, 120) can have lengths of from about 3 millimeters to about 12 millimeters, widths of from about 4 millimeters to about 10 millimeters and heights of from about 0.2 millimeters to about 4 millimeters.

[0036] FIGS. 1 and 2 are perspectives of a first preferred embodiment of implant (30). Within the scope of the current invention, implant (30) can be interconnected with a device distinct from the implant. It has been discovered that implant (30) is useful for spinal surgeries, and, in particular, surgeries for the cervical region of the spine.

[0037] Among other things, the preferred embodiment of implant (30), enabled in FIGS. 1 and 2, includes cylindrical extension (40), polyaxial head (50) and blade (80). Cylindrical extension (40) includes first end (42) and second end (44). Select preferred embodiments of cylindrical extension (40) and blade (80) create a uniform solid implant (30). Although not shown in the drawings, when engineering parameters require, extension (40) can be of geometric configurations other than cylindrical.

[0038] Polyaxial head (50) of implant (30) is adapted for connection with a device (not shown) distinct from implant (30). Examples of devices connectable to polyaxial head (40) include but are not limited to: rods, bars, cross-links, screws and locking nuts. Polyaxial head (50) is provided with spheroid (52) connected to first end (42) of cylindrical extension (40) and socket (54) connected to spheroid (52). Prior to surgical fixation, the combination of spheroid (52) and socket (54) allows polyaxial head (50) to be moved in a multitude of axes relative to cylindrical extension (40). Socket (54) is provided with an outward housing (56) and inward receptacle (58) including one or more threads (60). Selected preferred embodiments of housing (56) can be provided with openings (62, 64, 66) adapted to receive one or more devices distinct from implant (30).

[0039] Cylindrical extension (40) extends away from arcuate side (82) of blade (80). Arcuate side (82) of blade (80) is of a dimension wider than the diameter of cylindrical extension (40). Arcuate side (82) includes first wing (84) and second wing (86) where each wing (84, 86) extends away from the longitudinal axis of cylindrical extension (40). As shown in FIGS. 1 and 2, each wing (84, 86) is arched away from first end (42) of cylindrical extension (40).

[0040] Straight side (90) of blade (80) is of lesser length than arcuate side (82) and positioned opposite from arcuate side (82). Straight side (90) includes first end (92) and second end (94). First converging edge (96) connected to first wing (84) and second converging edge (98) connected second wing (86) converge toward each other as the converging edges (96, 98) approach straight side (90). Select preferred embodiments of the current invention can be provided with first transitional edge (100) connected to first end (92) of straight side (90) and first converging edge (96) and second transitional edge (102) second end (94) of straight side (90) and converging edge (98). Within the scope of the current invention, select preferred embodiments of implant (30) are not provided with transitional edges (100, 102) and converging edges (96, 98) are connected directly to first end (92, 94) of straight side (90). Regarding the current implant (30), straight side (90), converging edges (96, 98) and transitional edges (100, 102) are adapted to surgically cut bone and other tissues.

[0041] Implant (30) is provided with aperture (108) proximate the center of blade (80) that opens to a surgically created space. Aperture (108), among other things, allows a lower torsional resistance during insertion and a greater surface area for bone ingrowth or attachment of injected adhesives post implantation.

[0042] FIGS. 3 and 4 are perspectives of a second preferred embodiment of implant (30). Within the scope of the current invention, implant (30) can be interconnected with a device distinct from the implant, such as a nut (200) or other device (not shown) for coupling with implant (30). It has been discovered that implant (30) is useful for spinal surgeries, and, in particular, surgeries for the cervical region of the spine.

[0043] Among other things, the preferred embodiment of implant (30), enabled in FIGS. 3 and 4, includes cylindrical extension (40) and blade (80). Cylindrical extension (40) includes first end (42) and second end (44). First end (42) of cylindrical extension (40) is provided with thread (48) that can be utilized to connect implant (30) to a device distinct from implant (30). Thread (48) runs about at least a portion of the outward side of cylindrical extension (40) and advances from first end (42) toward the second end (44) of cylindrical extension (40). Preferred embodiments of cylindrical extension (40) are solid. Select preferred embodiments of cylindrical extension (40) and blade (80) create a uniform solid implant (30). Although not shown in the drawings, when engineering parameters require, extension (40) can be of geometric configurations other than cylindrical.

[0044] Cylindrical extension (40) extends away from arcuate side (82) of blade (80). Arcuate side (82) of blade (80) is of a dimension wider than the diameter of cylindrical extension (40). Arcuate side (82) is also provided with first wing (84) and second wing (86) where each wing (84, 86) extends away from the longitudinal axis of cylindrical extension (40). As shown in FIGS. 3 and 4, each wing (84, 86) is arched away from first end (42) of cylindrical extension (40).

[0045] Straight side (90) of blade (80) is of lesser length than arcuate side (82) and positioned opposite from arcuate side (82). Straight side (90) includes first end (92) and second end (94). First converging edge (96) connected to first wing (84) and second converging edge (98) connected second wing (86) converge toward each other as the converging edges (96, 98) approach straight side (90). Select preferred embodiments of the current invention can be provided with first transitional edge (100) connected to first end (92) of straight side (90) and first converging edge (96) and second transitional edge (102) second end (94) of straight side (90) and converging edge (98). Within the scope of the current invention, select preferred embodiments of implant (30) are not provided with transitional edges (100, 102) and converging edges (96, 98) are connected directly to first end (92, 94) of straight side (90). Regarding the current implant (30), straight side (90), converging edges (96, 98) and transitional edges (100, 102) are adapted to surgically cut bone and other tissues.

[0046] Implant (30) is provided with aperture (108) proximate the center of blade (80) that opens to a surgically created space. Aperture (108), among other things, allows a lower torsional resistance during insertion and a greater surface area for bone ingrowth or attachment of injected adhesives post implantation.

[0047] FIGS. 5 and 6 are perspectives of a third preferred embodiment of implant (30). Within the scope of the current invention, implant (30) can be interconnected with a device distinct from the implant. It has been discovered that implant (30) is useful for spinal surgeries, and, in particular, surgeries for the cervical region of the spine.

[0048] Among other things, the preferred embodiment of implant (30), enabled in FIGS. 5 and 6, includes cylindrical extension (40), polyaxial head (50) and blade (120). Cylindrical extension (40) is a solid and includes first end (42) and second end (44). Select preferred embodiments of cylindrical extension (40) and blade (80) create a uniform solid implant (30). Although not shown in the drawings, when engineering parameters require, extension (40) can be of geometric configurations other than cylindrical.

[0049] Polyaxial head (50) of implant (30) is adapted for connection with a device (not shown) distinct from implant (30). Examples of devices connectable to polyaxial head (50) include but are not limited to: rods, cross-links, bars, screws, and locking nuts. Polyaxial head (50) is provided with spheroid (52) connected to first end (42) of cylindrical extension (40) and socket (54) connected to spheroid (52). Prior to surgical fixation, the combination of spheroid (52) and socket (54) allows polyaxial head (50) to be moved in a multitude of axes relative to the longitudinal axis of cylindrical extension (40). Socket (54) is provided with an outward housing (56) and inward receptacle (58) including one or more threads (60). Selected preferred embodiments of housing (56) can be provided with openings (62, 64, 66) adapted to receive one or more devices distinct from implant (30).

[0050] Slanted side (122) of blade (120) is connected with second side (44) of cylindrical extension (40). Slanted side (122) of blade (120) is of a dimension wider than the diameter of cylindrical extension (40). Slanted side (122) includes first wing (124) and second wing (126) where each wing (124, 126) extends away from the longitudinal axis of cylindrical extension (40). As shown in FIGS. 5 and 6, a first one of the wings (124, 126) is arcuate and arched away from the first end cylindrical extension (40). A second one of the wings (124, 126) is provided with a pitched plane (128) facing first end (42) of cylindrical extension (40). The combination of an arcuate wing and a wing including a pitched plane creates an asymmetric blade (120). Pitched plane (128) intersects the longitudinal axis of implant (30) at an angle of between five and eighty five degrees as measured from the distal point of pitched plane (128) to the intersection of pitched plane and implant's (30) longitudinal axis.

[0051] Straight side (90) of blade (120) is of lesser length than slanted side (122) and positioned opposite from slanted side (122). Straight side (90) includes first end (92) and second end (94). First converging edge (96) connected to first wing (124) and second converging edge (98) connected second wing (126) converge toward each other as the converging edges (96, 98) approach straight side (90). Select preferred embodiments of the current invention can be provided with first transitional edge (100) connected to first end (92) of straight side (90) and first converging edge (96) and second transitional edge (102) second end (94) of straight side (90) and converging edge (98). Within the scope of the current invention, select preferred embodiments of implant (30) are not provided with transitional edges (100, 102) and converging edges (96, 98) are connected directly to first end (92, 94) of straight side (90). Regarding the current implant (30), straight side (90), converging edges (96, 98) and transitional edges (100, 102) are adapted to surgically cut bone and other tissues.

[0052] Implant (30) is provided with aperture (108) proximate the center of blade (80) that opens to a surgically created space. Aperture (108), among other things, allows a lower torsional resistance during insertion and a greater surface area for bone ingrowth or attachment of injected adhesives post implantation.

[0053] FIGS. 7 and 8 are perspectives of a fourth preferred embodiment of implant (30). Within the scope of the current invention, implant (30) can be interconnected with a device distinct from the implant, such as a nut (200) or other device (not shown) for coupling with implant (30). It has been discovered that implant (30) is useful for spinal surgeries, and, in particular, surgeries for the cervical region of the spine.

[0054] Among other things, the preferred embodiment of implant (30), enabled in FIGS. 7 and 8, includes cylindrical extension (40) and blade (120). Cylindrical extension (40) is a solid and includes first end (42) and second end (44). Select preferred embodiments of cylindrical extension (40) and blade (80) create a uniform solid implant (30). Although not shown in the drawings, when engineering parameters require, extension (40) can be of geometric configurations other than cylindrical.

[0055] First end (42) of cylindrical extension (40) is provided with thread (48) that can be utilized to connect implant (30) to a device distinct from implant (30). Thread (48) runs about at least a portion of the outward side of cylindrical extension (40) and advances from first end (42) toward the second end (44) of cylindrical extension (40).

[0056] Slanted side (122) of blade (120) is connected with second side (44) of cylindrical extension (40). Slanted side (122) of blade (120) is of a dimension wider than the diameter of cylindrical extension (40). Slanted side (122) includes first wing (124) and second wing (126) where each wing (124, 126) extends away from the longitudinal axis of cylindrical extension (40). As shown in FIGS. 7 and 8, a first one of the wings (124, 126) is arcuate and arched away from the first end cylindrical extension (40). A second one of the wings (124, 126) is provided with a pitched plane (128) facing first end (42) of cylindrical extension (40). The combination of an arcuate wing and a wing including a pitched plane creates an asymmetric blade (120). Pitched plane (128) intersects the longitudinal axis of implant (30) at an angle of between five and eighty five degrees as measured from the distal point of pitched plane (128) to the intersection of pitched plane and implant's (30) longitudinal axis.

[0057] Straight side (90) of blade (120) is of lesser length than slanted side (122) and positioned opposite from slanted side (122). Straight side (90) includes first end (92) and second end (94). First converging edge (96) connected to first wing (124) and second converging edge (98) connected second wing (126) converge toward each other as the converging edges (96, 98) approach straight side (90). Select preferred embodiments of the current invention can be provided with first transitional edge (100) connected to first end (92) of straight side (90) and first converging edge (96) and second transitional edge (102) second end (94) of straight side (90) and converging edge (98). Within the scope of the current invention, select preferred embodiments of implant (30) are not provided with transitional edges (100, 102) and converging edges (96, 98) are connected directly to first end (92, 94) of straight side (90). Regarding the current implant (30), straight side (90), converging edges (96, 98) and transitional edges (100, 102) are adapted to surgically cut bone and other tissues.

[0058] Implant (30) is provided with aperture (108) proximate the center of blade (80) that opens to a surgically created space. Aperture (108), among other things, allows a lower torsional resistance during insertion and a greater surface area for bone ingrowth or attachment of injected adhesives post implantation.

[0059] Applicant has enabled, described and disclosed the invention as required by the Patent Cooperation Treaty and Title 35 of the United States Code.