US20130310935A1 - Stand-alone spinal cage - Google Patents
Stand-alone spinal cage Download PDFInfo
- Publication number
- US20130310935A1 US20130310935A1 US13/949,436 US201313949436A US2013310935A1 US 20130310935 A1 US20130310935 A1 US 20130310935A1 US 201313949436 A US201313949436 A US 201313949436A US 2013310935 A1 US2013310935 A1 US 2013310935A1
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- US
- United States
- Prior art keywords
- piston
- cavity
- angled
- fastening member
- spinal cage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 0 C(CCC1CCCC1)C*CCCC1CC1 Chemical compound C(CCC1CCCC1)C*CCCC1CC1 0.000 description 2
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Classifications
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- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30891—Plurality of protrusions
- A61F2002/30892—Plurality of protrusions parallel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30899—Protrusions pierced with apertures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
A spinal cage device for fusion of spinal vertebrae comprising a cage body having a cavity defined by upper, lower, and side walls; a piston selectively insertable into the cavity through a side wall, the piston having at least one angled surface; at least one channel extending through at least one of the upper wall and the lower wall; at least one fastening member moveable within the at least one channel between a first disengaged position and a second engaged position; and wherein in second engaged position the at least one fastening member is held substantially stationary relative to the cage body by contact with the piston. According to one aspect of the invention, the device includes a locking means for supplementing fixation of the piston to the cage body.
Description
- This continuation patent application claims the benefit of and incorporates herein by reference, U.S. patent application Ser. No. 13/022,305, filed Feb. 7, 2011; and U.S. Provisional Application Ser. No. 61/302,088, filed Feb. 6, 2010.
- 1. Field of the Invention
- The present invention relates to a spinal cage device. More specifically, the present invention is a stand-alone spinal cage designed to obviate the need for an accompanying anterior spinal plating systems.
- 2. Description of the Related Art
- Traditional spinal cages are often implanted with anterior plating to prevent movement of the spinal cage over time. The present invention is a stand-alone spinal cage that obviates the need to use anterior spinal plating systems.
- The present invention is a spinal cage device for fusion of spinal vertebrae comprising a cage having a cavity defined by upper, lower, and side walls; a piston selectively insertable into the cavity through a side wall, the piston having at least one angled surface; at least one channel extending through at least one of the upper wall and the lower wall; at least one fastening member moveable within the at least one channel between a first disengaged position and a second engaged position; and wherein in second engaged position the at least one fastening member is held substantially stationary relative to the cage by contact with the piston. According to one aspect of the invention, the device includes a locking means for supplementing fixation of the piston to the cage by the internal screw(s). According to another aspect of the invention, the fastening members (e.g., nails or pins) of the device are porous to allow bone growth therethrough.
-
FIG. 1 is an assembly view of a first embodiment of the invention. -
FIG. 2A is a front view of the first embodiment. -
FIG. 2B is side elevation throughline 2B-2B ofFIG. 2A . -
FIG. 2C is a rear isometric view of the first embodiment. -
FIG. 3A-3C depict various views of the piston of the first embodiment. -
FIG. 4A-4B shows a fastening member and bushing of the first embodiment. -
FIG. 5A and 5B are a rear isometric and a top elevation view, of the first embodiment. -
FIG. 6 is an assembly view of a second embodiment of the invention. -
FIG. 7A-7C are a bottom, rear elevation, and top elevation of the cage of the second embodiment. -
FIG. 8A and 8B are a front elevation and a side isometric view of the piston of the second embodiment. -
FIG. 9A and 9B depict a fastening member and bushing, respectively, of the second embodiment. -
FIG. 10 is a rear isometric view of the second embodiment. -
FIG. 11A is an assembly view of a third embodiment of the invention. -
FIG. 11B is a rear isometric view of the third embodiment. -
FIG. 12A and 12B are a front isometric and a front view of the cage of the third embodiment.FIG. 12C is a side elevational view of the third embodiment of Applicant's invention. -
FIG. 13A and 13B are rear and front isometric views, respectively, of the piston, locking plate, and piston screw of the third embodiment. -
FIG. 13C is a front isometric view of the piston of the third embodiment. -
FIG. 14A-14C are various views of the fastening member of the third embodiment. -
FIG. 14D is a bushing of the third embodiment. -
FIG. 15A-15C are rear, front, and side elevations, respectively, of the third embodiment in the engaged state. -
FIG. 16A is an assembly view of a fourth embodiment of the invention. -
FIG. 16B is a rear isometric view of the fourth embodiment in an engaged state.FIG. 16C is a perspective view of a fourth embodiment of Applicant's device. - The present invention may be used in the cervical, lumbar, or thoracic regions of the spine. Some components of the embodiment described herein, such as the cage bodies, are preferably made of biocompatible OXPEKK, a poly-ether-ketone-ketone sold under the registered trademark of Oxford Performance Materials, Inc., Enfeld, Conn., USA. Alternative embodiments contemplate fabrication from biocompatible PEEK (poly-ether-ether-ketone). OXPEKK has approximately one-and-a-half to two times the compressive strength of PEEK, and therefore may be suited for constructing the cage body.
- In addition to the foregoing, it should be noted that, while the embodiments described herein are solid bodies, they may also be formed as porous bodies, as described in U.S. application Ser. No. 612/952,788 (filed Nov. 23, 2010), entitled “Spinal Cage Device” and incorporated by reference herein.
- While the terms “upper,” “lower,” “front,” “rear,” and similar terms are used throughout this document, it should be expressly understood that such are simply terms of convenience only to aid in description of the invention, and the orientation of the invention disclosed herein after during implantation is primarily within the surgeon's discretion.
- A
first embodiment 18 of the invention is shown inFIGS. 1-5 .FIG. 1 is an assembly view of thefirst embodiment 18, which comprises acage body 20 having upper andlower walls ridges 26. Upper andlower walls cavity 28 of thecage body 20.Openings 30 through the upper andlower walls cavity 28 to allow for bone growth thereinto from adjacent vertebrae. Apiston 32 having upper and lowerangled surfaces cavity 28 through a piston opening in the posterior sidewall of thecage body 20 to engage and drive nails 56. Piston screws 38 may thereafter be inserted through apiston faceplate 40 and secured to screwmounts 42 located in thecavity 28 near the posterior opening. -
FIGS. 2A-2C show thecage body 20 is greater detail. Upper andlower rails cavity 28 from, the upper and lower wails 22, 24, respectively. Screw mounts 42 are located near the posterior side of thecavity 28.Openings 30 through theupper wall 22 andlower wall 24 provide access thecavity 28 to allow for bone growth thereinto from adjacent vertebrae.Cylindrical channels 31 are located between the twoopenings 30 and provide a cylindrical path through theupper wall 22 to thecavity 28. A pair of cylindrical channels (not shown) is disposed through the lower wall in similar fashion and aligned with theupper channels 31. -
FIGS. 3A-3C show thepiston 32 of the first embodiment in greater detail. Thepiston 32 has upper and lower angledplanar surfaces lower grooves piston 32 and extend between thefaceplate 40 and the upper and lower angledplanar surfaces grooves piston 32 along, upper andlower rails 44, 46 (seeFIG. 2A ), respectively, of thecage body 20.Shoulders 52 are formed in the piston body having a thickness T1. Engagement surfaces 53 are located between theshoulders 52 and theangled surfaces -
FIGS. 4A and 4B show atitanium nail 56 andbushing 58 of the first embodiment in greater detail. Thenail 56 is generally cylindrical and has anail head 60 of thickness Ti at a proximal end and tapers to apoint 62 at the distal end. Thenail head 60 has an angledportion 64 corresponding to theangled surfaces FIGS. 3A-3C ). Theupper end 66 of thebushing 58 corresponds in shape to the upper wall 22 (seeFIGS. 2A-2C ) such that, when assembled, thebushing 58 is flush with theridges 26 of the upper surface of the cage body 20 (see, e.g.,FIG. 5A ). -
FIG. 5A andFIG. 5B are an isometric view and a top elevation view, respectively, of thefirst embodiment 18 with thenails 56 in a second engaged position. During implantation, theangled portions 60 of the nail heads 60 (seeFIGS. 4A-4B ) are contacted by and become flush with theangled surfaces FIGS. 3A-3C ), which, as thepiston 32 is inserted further into thecavity 28, causes thenails 56 to move upwardly through thechannels 31. In this manner, engagement of the upperangled surface 34 with thenail head 60 causes movement of thepiston 32 into thecavity 28 to drive thenail 56 into the adjacent vertebra above theembodiment 18. Similarly, engagement of the lowerangled surface 36 with nail heads causes movement of thepiston 32 into thecavity 28 to drive lower nails (not shown) into the adjacent vertebra below the embodiment. - After complete insertion of the
piston 32, eachnail head 60 becomes flush with thecorresponding engagement surface 53 to prevent thenail 56 from receding back into thecavity 28. This ensures fastening of thenail 56 to adjacent bone matter. The upper andlower rails 44, 46 (seeFIGS. 2A , 2C) occupy the upper andlower grooves piston 32 within thecavity 28. The ridgedbushings 58 are fitted within thechannels 31 in the annular space between thenail 56 and channel walls to facilitate slidable movement of thenail 56 therein. By threading thescrews 38 through thefaceplate 40 and the screw mounts 42, thepiston 32 is drawn into thecavity 28 and secured to thecage body 20. - A
second embodiment 118 of the invention, shown inFIG. 6-10 , comprises acage body 120 having upper andlower walls ridges 126. Upper andlower walls cavity 128 of thecage body 120.Openings 130 through the upper andlower walls cavity 128 to allow for bone growth thereinto from adjacent vertebrae. Apiston 132 having upper and lower angledplanar surfaces cavity 128 through a piston opening in the posterior wall of thecage body 120.Screws 138 may thereafter be inserted through apiston faceplate 140 and secured to screwmounts 142 located in thecavity 128 proximal to the piston opening. -
FIG. 7A-7C show thecage body 120 of the second embodiment is greater detail.FIG. 7A and 7C are bottom and top elevations, respectively, of thecage body 120.FIG. 7B is a rear elevation of thecage body 120. Upper andlower rails cavity 128 from, the upper andlower walls cavity 128.Openings 130 through the upper andlower walls cavity 128 to allow for bone growth thereinto from adjacent vertebrae. As shown inFIG. 7A , achannel 131 is located between the twoopenings 130 and provides a path through thelower wall 124 to the cavity. As shown inFIG. 7B , twochannels 133 are located between the twoopenings 130 and provide a path through theupper wall 122 to thecavity 128. -
FIG. 8A and 8B show thepiston 132 of thesecond embodiment 118 in greater detail. Thepiston 132 has upper and lowerangled surfaces lower grooves piston 132 from thefaceplate 140 to the upper and lowerangled surfaces lower grooves piston 132 along, upper andlower rails 144, 146 (seeFIG. 7B ) of thecage body 120.Shoulders 152 are formed in the piston body having a thickness T2. Engagement surfaces 153 are located between theshoulders 152 and theangled surfaces -
FIGS. 9A and 9B show atitanium pin 156 andbushing 158, respectively, of thesecond embodiment 118 in greater detail. Eachpin 156 has an angledengagement surface 160 that corresponds to the angle of the upper and lowerangled surfaces FIG. 8B ). Eachpin 156 tapers to awedge 162 at the distal end. Theupper end 166 of thebushing 158 corresponds in shape to the upper wall 122 (seeFIGS. 7A-7C ) such that, when assembled, thebushing 158 is flush with theridges 126 of the upper surface of the cage body 120 (see, e.g.,FIG. 10 ). -
FIG. 10 is a perspective view of thesecond embodiment 118 with thepins 156 in an engaged position. During implantation, the angled engagement surfaces 160 (seeFIGS. 9A-9B ) of thepins 156 are contacted by and become flush with the upper and lowerangled surfaces piston 132, which, as thepiston 132 is inserted further into thecavity 128, causes thepins 156 to move through thechannels angled surfaces pins 156 causes movement of thepiston 132 into thecavity 128 to drive thepins 156 into the adjacent vertebra. The piston screw heads are positioned anterior of the posterior surface of thefaceplate 140. - After insertion of the
piston 132 is complete, eachengagement surface 160 is flush with the engagement surfaces 153 of the piston to prevent thepins 156 from receding back into thecavity 128 and ensuring fastening of thepins 156 with adjacent bone matter. The upper andlower rails 144, 146 (seeFIGS. 7B ) occupy the upper andlower grooves piston 132 to ensure proper alignment of thepiston 132 within thecavity 128. The ridgedbushings 158 are fitted within the upper andlower channels pin 156 and channel wails to facilitate movement between disengaged and engaged positions. - A
third embodiment 218 of the invention, shown inFIG. 11-15 , comprises acage body 220 having upper andlower walls ridges 226. Upper andlower walls Openings 230 through the upper andlower wall lower lock openings cage body 220. - A
piston 232 having upper and lowerangled surfaces screw 238 may thereafter be inserted through apiston faceplate 240 and secured to ascrew mount 242 located at the posterior of the cavity 228. A lockingplate 280 having aclosed end 283 and an openedend 284 defined by upper andlower fingers faceplate 240 with a lockingmember screw 282. -
FIG. 12A-12C show thecage body 220 in greater detail. Ascrew mount 242 is located near the front of the cavity 228.Openings 230 through theupper wall 222 provide access to the cavity 228 to allow for bone growth thereinto from adjacent vertebrae.Rectangular channels openings 230 and provide paths through theupper wall 222 andlower wall 224 to the cavity. As shown inFIG. 12C , upper andlower rails lower walls -
FIG. 13A-13C show thepiston 232,piston screw 238, and lockingplate 280 of the third embodiment in greater detail. Thepiston 232 has upper and lowerangled surfaces lower grooves piston 232 between thefaceplate 240 and the upper and lowerangled surfaces lower grooves piston 232 along, upper andlower rails 244, 246 (seeFIG. 12C ) of thecage body 220.Shoulders 252 are formed in the piston body having a thickness T3. Engagement surfaces 253 are located between theshoulders 252 and the upper and lowerangled surfaces -
FIGS. 14A-14D show atitanium pin 256 andbushing 258, respectively, of thethird embodiment 218 in greater detail. Eachpin 256 has an angledengagement surface 260 that corresponds to the angle of the upper and lowerangled surfaces FIG. 13C ). Eachpin 256 tapers to anangled wedge 262 at the distal end. Theupper end 266 of thebushing 258 corresponds in shape to the ridged upper surface (seeFIG. 7A-7C ) such that, when assembled, thebushing 258 is flush with theridges 226 of the cage body 220 (see, e.g.,FIG. 10 ). -
FIGS. 15A-15C disclose rear, front, and side elevations, respectively of thethird embodiment 218. During implantation, the angled engagement surfaces 260 (seeFIGS. 14A-14C ) are contacted by and become flush with the upper and lowerangled surfaces piston 232, which, as thepiston 232 is inserted further into the cavity 228, causes thepins 256 to move upwardly through thechannels angled surfaces pin 256 causes movement of thepiston 232 into the cavity 228 to drive thepins 256 into the adjacent vertebra. - After insertion of the
piston 232 is complete, eachengagement surface 260 becomes flush with theengagement surface 253 to prevent the nail from receding back into the cavity 228 and ensuring fastening of thenail 256 with adjacent bone matter. The upper andlower rails 244, 246 (seeFIGS. 12A , 12C) occupy the upper andlower grooves piston 232 within the cavity 228. The ridgedbushings 258 are fitted within thechannels titanium pin 256 and channel walls to facilitate movement and retain thepins 256 in thechannels - Operation of the locking plate for this embodiment is identical to operation of the locking mechanism described hereafter with reference to the fourth embodiment
- A fourth embodiment comprises a
cage body 320, shown inFIGS. 16A-16C , comprises upper andlower walls ridges 326. Upper andlower walls cavity 328.Openings 330 through theupper wall 322 provide access to thecavity 328 to allow for bone growth thereinto from adjacent vertebrae. Upper andlower lock openings lower walls piston opening 328. - A
piston 332 having upper and lowerangled surfaces cavity 328. Ascrew 338 may thereafter be inserted through apiston faceplate 340 and secured to a screw mount located in thecavity 328. A lockingplate 380 having a closed end 383 opened end 384 defined by upper andlower fingers faceplate 340 with a screw 382. As shown inFIG. 16B , the fastening members of thefourth embodiment 318 comprisesporous blades 356 withlateral passages 357 therethrough to allow bone growth. -
FIG. 16B andFIG. 16C , which both depict the piston in an engaged position within thecage body 320, show thelocking plate 380 in the unlocked and locked position, respectively. In the unlocked position, thescrew 338 may be passed between the upper andlower fingers cage body 320 to support theblades 356, the lockingplate 380 is rotated around the lockingplate screw 381 so that thelower finger 386 extends into thelower lock opening 325 andupper finger 386 covers the head of the piston screw 382. In this position, the lockingplate 380 prevents “back out” of the piston screw 382 andpiston 332, which assures engagement of theblades 356 with the adjacent vertebrae. - Although the embodiments of the present invention disclose titanium fastening members, alternative embodiments include stainless steel fastening members.
- For each of the above-described embodiments, the upper and lower walls are at least substantially parallel. In alternative embodiments, however, the upper and lower walls may be angled relative to one another to correspond to curvature of the spine (e.g., to correspond to a lordotic curvature) at the targeted region of implantation. In such case, the front and rear sides will be of differing heights.
- In addition to the nail and/or pins described hereinabove, alternative embodiments of the present invention contemplate a fastening member with a blade- or knifelike appearance, such as the porous blades shown in
FIG. 17 andFIG. 20 . - The present invention is described in terms of preferred illustrative embodiments of specifically described stand-alone spinal cages. Those skilled in the art will recognize that yet other alternative embodiments of such a device can be used in carrying out the present invention. Other aspects, features, and advantages of the present invention may be obtained from a study of this disclosure and the drawings, along with the appended claims.
Claims (7)
1. A spinal cage device for fusion of spinal vertebrae comprising:
a cage body having upper, lower, and side walls that a define a cavity, said upper and lower walls having bone growth openings therethrough, said side walls including a posterior side wall with a piston opening therethrough and an anterior side wall;
a piston having a piston body with anterior and posterior ends, said piston body being insertable along a longitudinal axis into said cavity through said piston opening, wherein said piston body comprise at least two angled surfaces adjacent to said anterior end;
at least two fastening member channels extending through said upper and lower walls;
at least two fastening members moveable within said at least two fastening member channels between a first disengaged position and a second engaged position;
wherein in said second engaged position said at least two fastening members contact said piston body and are stationary relative to said cage body.
2. The spinal cage device of claim 1 wherein said fastening members comprises a generally cylindrical nail having a nail head with a proximal surface and a distal end, said nail head having an angled portion at least substantially corresponding to an angle of said at least two angled surfaces.
3. The spinal cage device of claim 1 further comprising:
at least one screw mount positioned in the cavity;
a faceplate connected to the posterior end of the piston body, said faceplate being insertable into the piston opening; and
at least one screw insertable through said faceplate and matable with said at least one screw mount.
4. The spinal cage device of claim 1 wherein the at least two angled surfaces adjacent to said anterior end of said piston comprise upper and lower angled surfaces, wherein said fastening member comprises an angled engagement surface corresponding to the angle of at least one of said upper and lower surfaces, said fastening member tapering to a wedge at its distal end.
5. The spinal cage device claim 1 wherein each of said upper and lower angled surfaces is longitudinally alignable with at least one of said fastening member channels.
6. The spinal cage device of claim 1 further comprising:
at least one lock opening proximal to said piston opening; and
a locking member rotatably-connected to said faceplate;
wherein in said second engaged position said locking member is rotatable to a locked position in which a portion of said locking member extends into said at least one lock opening and a portion of said locking member is positioned adjacent said screw.
7. The spinal cage device of claim 1 wherein said at least one fastening member is porous to allow home growth therethrough.
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US13/949,436 US20130310935A1 (en) | 2010-02-06 | 2013-07-24 | Stand-alone spinal cage |
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US10849758B2 (en) * | 2018-08-22 | 2020-12-01 | Institute for Musculoskeletal Science and Education, Ltd. | Spinal fusion implant |
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US9693876B1 (en) | 2012-03-30 | 2017-07-04 | Ali H. MESIWALA | Spinal fusion implant and related methods |
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US9220610B2 (en) * | 2013-03-20 | 2015-12-29 | Kuei Jung CHEN | Textured implant device having series extendible blades |
US9968464B2 (en) * | 2014-01-17 | 2018-05-15 | Spine Wave, Inc. | Spinal fusion system |
US9763804B1 (en) * | 2016-03-11 | 2017-09-19 | Ossaware Biotech Co., Ltd. | Bone fusion device |
US9937055B1 (en) | 2016-11-28 | 2018-04-10 | Spine Wave, Inc. | Scoring implant trial and implant inserter for spinal fusion system |
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