Wedge-like spinal implant

• US 8,361,149 B2
• Filed: 08/27/2009
• Issued: 01/29/2013
• 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:
  US12/583,864
• Publication Number:
  US 20100324681A1
• Time in Patent Office: 1,251 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 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• 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 spinal implant that can be inserted into a surgically created cavity of one or more regions of the mammalian spine. Universal corner posts and one or more lateral universal posts are connected with a series of trapezoidal wedge-like dividers. The series of dividers includes a generally horizontal divider, a first set of dividers diverging away from the horizontal and a second set of dividers diverging away from the horizontal. Embodiments of the current cage can further include brakes, bars and superior and inferior plates.

Claims

1. A wedge-like spinal implant comprising titanium, stainless steel, resorbable polymers, non-resorbable polymers or combinations thereof;

said wedge-like spinal implant comprising a length of consecutively joined receptacles having 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 having a common lengthwise axis, wherein each 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;

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 first universal posts contacting said first sides of said dividers;

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

f) one or more inward universal posts contacting said inward sides of said dividers;

g) one or more bars, parallel to one or more of said outward sides of said series, contacting one of said first universal posts and one of said second universal posts;

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

i) one or more second side brakes, comprising a bore, proximate to said one or more second outward corners and extending laterally beyond said second sides; and

j) said series of trapezoidal dividers further comprising;

i) a centralized generally horizontal divider;

ii) a first set of dividers spaced apart from each other and extending in a first direction away from said centralized generally horizontal divider, wherein said inward side of each of said first set of dividers is closer to said centralized generally horizontal divider than said outward side of each of said first set of dividers such that each of said first set of dividers converges toward said centralized generally horizontal divider at angles of from about 1 degree to about 10 degrees from horizontal; and

iii) a second set of dividers spaced apart from each other and extending in a second direction away from said centralized generally horizontal divider, wherein said inward side of each of said second set of dividers is closer to said centralized generally horizontal divider than said outward side of each of said second set of dividers such that each of said second set of dividers converges toward said centralized generally horizontal divider at angles of from about 1 degree to about 10 degrees from horizontal.

2. The wedge-like spinal implant of claim 1 further comprising a plurality of ties contacting said first corner post, said second corner post, said first universal posts, said second universal posts and said inward universal posts.

3. The wedge-like spinal implant of claim 2 wherein said first universal corner post is angled at about ninety degrees to simultaneously connect with said first inward corners of said series and said second universal corner post is angled at about ninety degrees to simultaneously connect with said second inward corners of said series.

4. The wedge-like spinal implant of claim 3 wherein:

a) an outward side of a first trapezoidal divider distant from said centralized generally horizontal divider further comprises a first plate including one or more bores therein;

or

b) said outward side of said first trapezoidal divider distant from said centralized generally horizontal divider further comprises said first plate including one or more bores therein and a second trapezoidal divider distant from said centralized generally horizontal divider further comprises a second plate including one or more bores therein;

or

c) said outward side of said first trapezoidal divider distant from said centrally generally horizontal divider further comprises said first plate including one or more bores therein and said second trapezoidal divider distant from said centralized generally horizontal divider includes one or more bores therein;

or

d) said outward side of said first trapezoidal divider distant from said centrally generally horizontal divider includes one or more bores therein and said second trapezoidal divider distant from said centralized generally horizontal divider includes one or more bores therein;

or

e) said outward side of said first trapezoidal divider distant from said centrally generally horizontal divider includes one or more bores therein.

5. A wedge-like cage including peripheral openings a surgeon can see through prior to addition of osteogenic substances;

said cage capable of implantation into a cavity surgically created between a superior spinal region and an inferior spinal region of a mammal;

said cage comprising;

a) a series of trapezoidal dividers, wherein each said divider comprises an inward side, an outward side and opposing first and second lateral sides such that a combination of said sides creates an aperture;

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 lateral sides of said series;

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

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

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;

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

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; and

h) said series of trapezoidal dividers further comprising;

i) a generally horizontal divider;

ii) a first set of dividers spaced apart from each other and extending in a first direction away from said generally horizontal divider, wherein said inward side of each of said first set of dividers is closer to said generally horizontal divider than said outward side of each of said first set of dividers; and

iii) a second set of dividers spaced apart from each other and extending in a second direction, opposite said first direction, away from said generally horizontal divider, wherein said inward side of each of said second set of dividers is closer to said generally horizontal divider than said outward side of each of said second set of dividers.

6. The wedge-like cage of claim 5 further comprising:

a) one or more bars, parallel with and proximate to one or more of said outward sides of said series, contacting one of said first universal posts and one said second universal posts; and

b) one or more inward universal corner posts.

7. The wedge-like cage of claim 6, wherein one or more of said one or more bars comprises:

a) a first extension extending laterally beyond said first sides of said series; and

b) a second extension extending laterally beyond said second sides of said series.

8. The wedge-like cage of claim 7 further comprising a plurality of ties contacting said first corner post, said second corner post, said first universal posts and said second universal posts.

9. The wedge-like cage of claim 8 wherein:

a) said first set of dividers diverges toward said generally horizontal divider at angles of from about 1 degree to about 10 degrees from horizontal; and

b) said second set of dividers diverges toward said generally horizontal divider at angles of from about 1 degree to about 10 degrees from horizontal.

10. The wedge-like cage of claim 9 wherein said first universal corner post is angled at about ninety degrees to simultaneously connect with said first inward corners of said series and said second universal corner post is angled at about ninety degrees to simultaneously connect with said second inward corners of said series.

11. A wedge-like cage capable of implantation into a cavity surgically created between a superior spinal region and an inferior spinal region of a mammal;

said wedge-like cage comprising;

a) a series of trapezoidal braces, wherein said series is adapted to extend for an approximate length of said surgically created cavity as said cavity is measured along a longitudinal axis, wherein each trapezoidal brace further includes two sides of equal length and an aperture, and wherein said series comprises;

i) a straight brace;

ii) one or more first angled braces spaced apart from each other and extending in a first direction away from said straight brace; and

iii) one or more second angled braces spaced apart from each other and extending in a second direction away from said straight brace;

b) an inward support;

c) an outward support;

d) a first lateral support; and

e) a second lateral support, wherein said supports are joined with each other such that an outer surface area of said outward support is greater than an outer surface area of said inward support.

12. The wedge-like cage of claim 11, wherein:

a) said inward support comprises;

i) a first corner common with said first lateral support; and

ii) a second corner common with said second lateral support; and

b) said outward support comprises a border common with said first lateral support and said second lateral support.

13. The wedge-like cage of claim 12 wherein an inward side of each of said one or more first angled braces and an inward side of each of said one or more second angled braces are closer to said straight brace than outward sides of said one or more first angled braces and said one or more second angled braces.

14. The wedge-like cage of claim 13, wherein said inward support and said lateral supports further comprise one or more posts and one or more ties.

15. The wedge-like cage of claim 14 further comprising one or more bars parallel with outward edges of said braces.

16. The wedge-like cage of claim 15 further comprising:

a) one or more first side brakes proximate a first side of said outward support, wherein first side brakes extend laterally beyond said first lateral support;

b) one or more second side brakes proximate a second side of said outward support, wherein said second side brakes extend laterally beyond said second lateral support;

c) one or more first lateral extensions proximate one or more of said first side brakes, wherein said one or more first lateral extensions are generally parallel said first side brakes; and

d) one or more second lateral extensions proximate one or more of said second side brakes, wherein said one or more second lateral extensions are generally parallel said second side brakes.

17. The wedge-like cage of claim 16, wherein one or more of said brakes or one or more of said lateral extensions includes a bore therein.

18. The wedge-like cage of claim 17 wherein:

a) said first set of angled braces converges toward said straight brace at angles of from about 1 degree to about 10 degrees from horizontal; and

b) said second set of angled braces converges toward straight brace at angles of from about 1 degree to about 10 degrees from horizontal.

19. The wedge-like cage of claim 18, wherein said wedge-like cage comprises:

titanium, stainless steel, resorbable polymers, non-resorbable polymers or combinations thereof.