Spinal implant with overlay

• US 8,016,887 B1
• Filed: 01/09/2009
• Issued: 09/13/2011
• 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): Hoffman; Mary
• Application Number:
  US12/319,674
• Time in Patent Office: 977 Days
• Field of Search: 623 1711- 1716
• US Class Current: 623/17.11
• CPC Class Codes: A61B 17/7059 Cortical plates A61B17/7007, A61B17/7058 take precedence
• 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 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30604 modular
• 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

A spinal implant and an overlay for interlocking with the face of the spinal implant. Grooves and/or channels of the overlay interlock with the face of the implant. The overlay assists in securing the implant within the surgically created cavity.

Claims

1. In combination, an implant capable of implantation into a surgically created cavity between a superior vertebra and an inferior vertebra and an overlay capable of covering said implant:

I) said implant, comprising;

a) a series of dividers;

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

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

d) a third corner post contacting first outward corners of said series; and

e) a fourth corner post contacting second outward corners of said series; and

II) said overlay, capable of covering said implant, comprising;

a) an outward generally smooth surface;

b) an inward surface opposite said outward generally smooth surface, wherein said inward surface comprises indentations for interlocking with outward edges of said series, said third corner post and said fourth corner post;

c) sidewalls extending between said outward generally smooth surface and said inward surface; and

d) one or more apertures extending through said overlay, wherein said one or more apertures are proximate to one or more margins of said overlay.

2. The invention of claim 1, wherein said implant further comprises:

a) one or more posts contacting said series and positioned between said first corner post said third corner post; and

b) one or more posts contacting said series and positioned between said second corner and said fourth corner, wherein prior to addition of osteogenic substances into said implant, a surgeon can see through said openings created by said posts and said dividers.

3. The invention of claim 2 further comprising:

a) one or more first side brakes attached to said third corner post and extending laterally beyond first sides of said series; and

b) one or more second side brakes attached to said fourth corner posts and extending laterally beyond second sides of said series.

4. The invention of claim 3, wherein one or more of said first side brakes and one or more of said second side brakes comprises a bore.

5. The invention of claim 3 further comprising:

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

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

6. The invention of claim 5, wherein said first plate extends above said superior divider and said second plate depends downward from said inferior divider of said series.

7. The invention of claim 2, wherein said overlay is quadrilateral.

8. The invention of claim 7, wherein said indentations comprise:

a) a first groove proximate a first side of said overlay;

b) a second groove proximate a second side of said overlay; and

c) a plurality of generally transverse channels interconnected with said first groove and said second groove.