Orthopedic implant, method, and kit
Disclosed in an orthopedic implant that comprises a spacer portion having a superior portion and an inferior portion, and a staple portion. The staple portion is integral with the spacer portion and comprises a crown portion and first and second leg portions, the first and second leg portions having distal end that converge front the crown portion and that are composed of a material that has superelastic properties at body temperatures, whereby the first and second leg portions are configured to impart a compressive biasing force when the implant is installed with the legs under tension.
1. An orthopedic implant comprising:
a spacer portion having a superior portion and an inferior portion; and
a first staple portion, said staple portion being integral with the spacer portion, said first staple portion comprising a first crown portion and first and second leg portions, the first and second leg portions having distal ends that converge from the first crown portion, said first crown portion being connected to the spacer portion proximal said superior portion, the spacer portion extending beyond the first crown portion in the inferior direction generally towards the distal ends of the first and second leg portions;
at least said first staple portion of said implant comprising a metal material that has superelastic properties at body temperatures, wherein the distal end of the first leg portion is sized to be receivable within a bone hole in a first bone segment and the distal end of the second leg portion is sized to be receivable within a bone hole in a second bone segment, wherein said first and second leg portions are configured with inner surfaces that impart a compressive biasing force when the implant is installed with the legs under tension, and wherein the spacer portion is configured to maintain a spaced apart relationship between the first and second bone segments,
further comprising a second staple portion integral with the spacer portion and comprising a material that has superelastic properties at body temperatures, said second staple portion comprising a second crown portion and third and fourth leg portions, the third and fourth leg portions having distal ends that converge from the second crown portion, said second crown portion being connected to the spacer portion proximal said superior portion and being spaced apart from said first crown portion of said first staple portion, whereby said third and fourth leg portions are configured to impart a compressive biasing force when the implant is installed with the legs under tension.
2. The orthopedic implant of claim 1 , wherein the inner surface of each leg portion has a bone-retaining feature.
3. The orthopedic implant of claim 2 , the bone-retaining-feature comprising a plurality of barbs.
4. The orthopedic implant of claim 1 , the superelastic material comprising a nickel-titanium alloy.
5. The orthopedic implant of claim 1 , said superior portion having a greater lateral dimension than said inferior portion to thereby impart a wedge shape to said spacer portion.
6. The orthopedic implant of claim 5 , the spacer portion having superior transverse edges that are generally parallel to one another.
7. The orthopedic implant of claim 5 , the spacer portion having a graft window traversing the spacer portion in a direction generally perpendicular to the transverse edges.
8. The orthopedic implant of claim 5 , the spacer portion having superior transverse edges that are converging.
9. The orthopedic implant of claim 1 , the crown portion of said first staple portion being superior to the superior portion of said spacer portion.
10. The orthopedic implant of claim 1 , the spacer portion having a tapered wedged profile.
11. The orthopedic implant of claim 1 , said superior portion having a greater lateral dimension than said inferior portion to thereby impart a wedge shape to said spacer portion, said spacer having a uniform thickness.
12. An orthopedic implant kit, comprising:
an orthopedic implant comprising:
a spacer portion having a superior portion and an inferior portion; and
a first staple portion, said staple portion being integral with the spacer portion, said first staple portion comprising a first crown portion and first and second leg portions, the first and second leg portions having distal ends that converge from the first crown portion, said first crown portion being connected to the spacer portion proximal said superior portion, the spacer portion extending beyond the first crown portion in the inferior direction generally towards the distal ends of the first and second leg portions;
at least said first staple portion of said implant comprising a metal material that has superelastic properties at body temperatures, wherein the distal end of the first leg portion is sized to be received within a bone hole in a first bone segment and the distal end of the second leg portion is sized to be received within a bone hole in a second bone segment, wherein said first and second leg portions are configured with inner surfaces that impart a compressive biasing force when the implant is installed with the legs under tension; wherein the spacer portion is configured to maintain a spaced apart relationship between the first and second bone segments, and
an insertion tool releasably holding said implant and maintaining said first and second legs in tension.
13. The orthopedic implant kit of claim 12 , further comprising a drilling template for positioning pilot shafts in the bone of a patient.
14. The orthopedic implant kit of claim 12 , wherein the material of said entire implant is a metal that has superelastic properties at body temperatures.
15. A method for performing a surgical procedure on a patient, comprising:
surgically exposing one or more bones or bone segments;
cutting said at least one or more bones or bone segments to create an opening suitable for insertion of a spacer;
providing the orthopedic implant kit of claim 12 ;
using said insertion tool to position the spacer in the opening and to position the legs of the staple in at least one of the one or more bones or bone segments of the patient, the legs of the staple imparting a compressive biasing force on said bones or bone segments; and
releasing the orthopedic implant from the insertion tool.