Spinal implant and method of using spinal implant

• US 8,226,718 B2
• Filed: 10/27/2008
• Issued: 07/24/2012
• Est. Priority Date: 03/24/2005
• Status: Active Grant

• Current Assignee: K2M, Inc (Stryker Corporation)
• Original Assignee: Cardinal Spine LLC
• Inventors: Castro, Frank
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): Cumberledge, Jerry
• Application Number:
  US12/290,069
• Publication Number:
  US 20100324679A1
• Time in Patent Office: 1,366 Days
• Field of Search: 623 1711- 1716
• US Class Current: 623/17.11
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2002/2817 Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• CPC Class Codes: A61F 2002/30032 differing in absorbability or resorbability, i.e. in absorption or resorption time
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30158 trapezoidal
• CPC Class Codes: A61F 2002/30261 parallelepipedal
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30578 having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30878 with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/449 comprising multiple spinal implants located in different intervertebral spaces or in different vertebrae
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

The present invention is a brace or spinal implant that can be inserted into vertebra that has had a cavity surgically created therein. The trapezoidal shaped spinal implant includes an opening that allows the surgical team to view the dura mater prior to packing the implant with osteogenic substances. Embodiments of the current invention can include brakes, superior and inferior plates which assist with the fixation of the implant to vertebral bone.

Claims

1. An implant capable of extending along an upright axis between an inferior side and a superior side of a surgically created cavity, wherein said implant is capable of implantation into said surgically created cavity and of affixture with bone, and wherein, prior to insertion into said cavity, said implant comprises:

a span of consecutively joined receptacles into which osteogenic substances can be packed before completion of surgery;

said span further comprising;

a) titanium, stainless steel, resorbable polymers, non-resorbable polymers or combinations thereof;

b) one or more intermediate generally horizontal dividers, comprising;

i) an inward short side;

ii) a long side outward from and opposite of said short side;

iii) a first converging side converging from a first end of said outward long side to a first end of said inward short side to create a first corner;

iv) a second converging side converging from a second end of said outward long side to a second end of said inward short side to create a second corner; and

v) a trapezoidal aperture created by inward edges of said short side, said long side, said first converging side and said second converging side;

c) an inferior generally horizontal divider comprising an inferior aperture corresponding to said one or more trapezoidal apertures;

d) a superior generally horizontal divider comprising a superior aperture corresponding to said one or more trapezoidal apertures;

e) a first universal corner post contacting said one or more first corners and corresponding first corners of said inferior and said superior generally horizontally dividers;

f) a second universal corner post contacting said one or more second corners and corresponding second corners of said inferior and said superior generally horizontally dividers;

g) one or more first side upright universal posts positioned outward from said first corners and contacting said first corresponding sides of said one or more interior generally horizontal dividers, said inferior generally horizontal divider and said superior generally horizontal divider;

h) one or more second side upright universal posts positioned outward from said second corners and contacting said second corresponding sides of said one or more interior generally horizontal dividers, said inferior generally horizontal divider and said superior generally horizontal divider, wherein combination of said interior generally horizontal dividers, said inferior generally horizontal divider, said superior generally horizontal divider, said universal corner posts and said upright universal posts creates openings of more than one cross-sectional area about the outer border of said implant, such that, prior to addition of osteogenic substances to said implant, a surgeon can see through said openings;

i) a plurality of brakes integral with said long sides of said one or more interior generally horizontal dividers, wherein said brakes extend laterally beyond said first converging sides and said second converging sides of said one or more interior generally horizontal dividers, and wherein one or more of said brakes comprises a bore for receiving a fastener;

j) a lower plate adjoining said long side of said inferior generally horizontal divider, wherein said lower plate comprises one or more bores; and

k) an upper plate adjoining said long side of said superior generally horizontal divider, wherein said upper plate comprises one or more bores.

2. The implant of claim 1 further comprising a plurality of ties contacting said universal posts.

3. The implant of claim 2 wherein said first universal corner post is angled at about ninety degrees to simultaneously connect with said first converging sides and corresponding said inward short sides of said generally horizontal dividers, and wherein said second universal corner post is angled at about ninety degrees to simultaneously connect with said second converging sides and corresponding said inward short sides of said generally horizontal dividers.

4. The implant of claim 3, where said lower plate depends downward from said inferior generally horizontal divider and said upper plate extends upward from said superior generally horizontal divider.

5. An implant capable of fitting into a cavity surgically created between a superior vertebra and an inferior vertebra, said implant comprising:

a) a trapezoidal base comprising;

i) a short side;

ii) a long side;

iii) a first converging side creating a first corner with said short side and a third corner with said long side;

iv) a second converging side creating a second corner with said short side and a fourth corner with said long side; and

v) an aperture bounded by inner edges of said sides;

b) a first corner post extending vertically from said first corner;

c) a second corner post extending vertically from said second corner;

d) a third corner post extending vertically from said third corner;

e) a fourth corner post extending vertically from said fourth corner;

f) a top attached to said vertical posts further comprising an opening corresponding to said base'"'"'s aperture;

g) one or more generally parallel dividers intermediate between said trapezoidal base and said top attached to said vertical posts;

each generally parallel divider positioned between said base and said top, wherein said one or more generally parallel dividers, said base and said top form one or more receptacles capable of receiving osteogenic substances, and wherein, prior to addition of osteogenic substances into said one or more receptacles, arrangement of said one or more generally parallel dividers, said vertical posts, said base and said top includes openings allowing a surgeon to see through said implant;

h) one or more first side brakes, comprising a bore, attached to said third post and extending laterally beyond an outer edge of said first converging side of said implant;

i) one or more second side brakes, comprising a bore, attached to said fourth post and extending laterally beyond an outer edge of said second converging side of said implant; and

j) a first plate, comprising a bore, attached to an outward edge of said base or an outward edge of said top.

6. The implant of claim 5 further comprising a second plate, comprising a bore, attached to an outward edge of said base or an outward edge of said top not having said first plate attached thereto.

7. The implant of claim 6 further comprising:

a) one or more vertical posts extending between said base and said top; and

b) a plurality of ties contacting said corner posts and said one or more vertical posts.

8. The implant of claim 7 wherein said first corner post is angled at about ninety degrees to simultaneously connect with said first converging sides and said short sides of said one or more generally parallel dividers, and wherein said second corner post is angled at about ninety degrees to simultaneously connect with said second converging sides and short sides of said one or more generally parallel dividers.

9. The implant of claim 8, wherein said first plate and said second plate extend vertically outward from said implant.

10. A length of consecutively joined receptacles comprising peripheral openings a surgeon can see through prior to addition of osteogenic substances, wherein said length of consecutively joined receptacles comprises:

a) a series of trapezoidal dividers comprising first and second outward trapezoidal dividers and one or more inward trapezoidal dividers, wherein each said divider comprises;

i) an inward side;

ii) an outward side;

iii) a first side connected with said outward side and said inward side forming a first outward corner with said outward side and a first inward corner with said inward side;

iv) a second side connected with said outward side and said inward side forming a second outward corner with said outward side and a second inward corner with said inward side; and

v) an aperture of similar area;

b) a first universal corner post contacting said first inward corners;

c) a second universal corner post contacting said second inward corners;

d) one or more universal posts contacting said first sides of said dividers; and

e) one or more universal posts contacting said second sides of said dividers;

f) one or more first side brakes, comprising a bore, attached to said one or more first outward corners and extending laterally beyond said first sides; and

g) one or more second side brakes, comprising a bore, attached to said one or more second outward corners and extending laterally beyond said second sides.

11. The length of consecutively joined receptacles of claim 10 further comprising:

a) a first plate, comprising a plurality of bores, attached to a superior trapezoidal divider of said generally vertical series of trapezoidal dividers; and

b) a second plate, comprising a plurality of bores, attached to an inferior trapezoidal divider of said generally vertical series of trapezoidal dividers.

12. The length of consecutively joined receptacles of claim 11 further comprising a plurality of ties contacting said universal corner posts and said universal posts.

13. The length of consecutively joined receptacles of claim 12 wherein said first universal corner post is angled at about ninety degrees to simultaneously connect with said first sides and said short sides of said generally vertical series of trapezoidal dividers, and wherein said second universal corner post is angled at about ninety degrees to simultaneously connect with said second sides and short sides of said generally vertical series of trapezoidal dividers.

14. The length of consecutively joined receptacles of claim 13, wherein said first plate extends above said superior trapezoidal divider and said second plate depends below said inferior trapezoidal divider.

15. An implant capable of implantation into a surgically cavity created between a superior vertebra and an inferior vertebra, comprising peripheral openings a surgeon can see through prior to addition of osteogenic substances, wherein said implant comprises:

a) a series of trapezoidal dividers;

said series comprising first and second outward trapezoidal dividers and one or more inward trapezoidal dividers, wherein each said trapezoidal divider comprises a perimeter of similar length;

b) a first universal corner post contacting first inward corners of said series;

c) a second universal corner post contacting second inward corners of said series;

d) one or more first universal posts contacting first sides of said series;

e) one or more second universal posts contacting second sides of said series;

f) one or more first side brakes attached to one or more outward edges of said series;

said one or more first side brakes extending laterally beyond said first sides of said series, wherein at least one of said first side brakes comprises a bore for receiving a fastener; and

g) one or more second side brakes attached to one or more outward edges of said series;

said one or more second side brakes extending laterally beyond said second sides of said series, wherein at least one of said second side brakes comprises a bore for receiving a fastener.

16. The implant of claim 15 further comprising a plurality of ties contacting said universal corner posts and said universal posts.

17. The implant of claim 16 further comprising:

a) a first plate, comprising a bore, attached to an outward edge of a superior trapezoidal divider of said series; and

b) a second plate, comprising a bore, attached to an outward edge of an inferior trapezoidal divider of said series.

18. The implant of claim 17, wherein said first plate extends above a superior trapezoidal divider of said series and said second plate depends below an inferior trapezoidal divider of said series.

19. The implant of claim 16, wherein said outward edge of said superior trapezoidal divider comprises a plurality of bores inset from a first side and a second side of said superior trapezoidal divider of said series, and wherein said outward edge of said inferior trapezoidal divider comprises a plurality of bores inset from a first side and a second side of said inferior trapezoidal divider of said series.

20. A generally vertical implant capable of implantation into a surgical cavity created between a superior vertebra and an inferior vertebra, comprising peripheral openings a surgeon can see through prior to addition of osteogenic substances, wherein said generally vertical implant comprises:

a) a series of trapezoidal dividers, wherein said series comprises first and second outward trapezoidal dividers and one or more inward trapezoidal dividers;

b) a first universal corner post contacting first inward corners of said series;

c) a second universal corner post contacting second inward corners of said series;

d) one or more first universal posts contacting first sides of said series;

e) one or more second universal posts contacting second sides of said series;

f) a first plate, comprising a bore, attached to an outward edge of trapezoidal divider of said series; and

g) a second plate, comprising a bore, attached to an outward edge of an inferior trapezoidal divider of said series.

21. The implant of claim 20 further comprising:

a) one or more first side brakes attached to one or more outward edges of said series;

said one or more first side brakes extending laterally beyond said first sides of said series, wherein at least one of said first side brakes comprises a bore for receiving a fastener; and

b) one or more second side brakes attached to one or more outward edges of said series;

said one or more second side brakes extending laterally beyond said second sides of said series, wherein at least one of said second side brakes comprises a bore for receiving a fastener.

22. The implant of claim 21 further comprising a plurality of ties contacting said universal corner posts and said universal posts.

23. The implant of claim 22, wherein said first plate extends above said superior trapezoidal divider of said series and said second plate depends below said inferior trapezoidal divider of said series.