Implant with curved bone contacting elements

• US 10,449,051 B2
• Filed: 10/23/2017
• Issued: 10/22/2019
• Est. Priority Date: 04/29/2015
• Status: Active Grant

• Current Assignee: The Institute of Musculoskeletal Science & Education
• Original Assignee: Institute For Musculoskeletal Science and Education Limited
• Inventors: Hamzey, Rami, Morris, Robert, Duffield, William, McShane, III, Edward J., Stauffer, Megan A., Gordon, Mathew, Nyahay, Joseph M.
• Primary Examiner(s): Summitt, Lynnsy M
• Application Number:
  US15/791,279
• Publication Number:
  US 20180296347A1
• Time in Patent Office: 729 Days
• CPC Class Codes: A61B 17/7055 connected to sacrum, pelvis or skull
• CPC Class Codes: A61B 17/8095 Wedge osteotomy devices
• CPC Class Codes: A61F 2/02 Prostheses implantable into the body closure means for urethra or rectum or for artificial body openings therefor A61F2/0004
• CPC Class Codes: A61F 2/30734 Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
• CPC Class Codes: A61F 2/30744 End caps, e.g. for closing an endoprosthetic cavity
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/30988 Other joints not covered by any of the groups A61F2/32 - A61F2/4425
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/4225 for feet, e.g. toes
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30113 circular
• CPC Class Codes: A61F 2002/30116 partial circles, i.e. circular segments
• CPC Class Codes: A61F 2002/30125 elliptical or oval
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/30176 V-shaped
• CPC Class Codes: A61F 2002/30289 helically-coiled
• CPC Class Codes: A61F 2002/30291 spirally-coiled, i.e. having a 2D spiral cross-section
• CPC Class Codes: A61F 2002/30298 : Parallelepipedal body made by spirally rolling up a sheet or a strip around itself
• CPC Class Codes: A61F 2002/30405 : made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30593 : hollow
• CPC Class Codes: A61F 2002/30736 : Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30838 : Microstructures
• 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 2002/30889 : Arcuate pegs
• CPC Class Codes: A61F 2002/30894 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3092 : having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3093 : for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/30957 : using a positive or a negative model, e.g. moulds
• CPC Class Codes: A61F 2002/30962 : using stereolithography
• CPC Class Codes: A61F 2002/30985 : using three dimensional printing [3DP]
• CPC Class Codes: A61F 2002/30995 : for sacro-iliac joints
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: B22F 10/20 : Direct sintering or melting
• CPC Class Codes: B22F 3/11 : Making porous workpieces or articles
• CPC Class Codes: B22F 3/225 : by injection molding
• CPC Class Codes: B22F 3/227 : by organic binder assisted extrusion
• CPC Class Codes: B33Y 80/00 : Products made by additive manufacturing
• CPC Class Codes: Y02P 10/25 : Process efficiency

Abstract

An implant includes a body having a leading edge portion, a trailing edge portion, and an intermediate portion extending between the leading edge portion and the trailing edge portion. The leading edge portion includes a substantially smooth surface forming a substantial majority of a leading edge surface of the leading edge portion. The trailing edge portion includes a monolithic structure including at least one receptacle configured to receive an insertion tool. In addition, the intermediate portion includes a plurality of elongate curved structural members.

Claims

1. An implant, comprising:

a body having a leading edge portion, a trailing edge portion, and an intermediate portion extending between the leading edge portion and the trailing edge portion, the body having a central axis extending from the leading edge portion to the trailing edge portion;

wherein the leading edge portion includes a substantially smooth surface forming a substantial majority of a leading edge surface of the leading edge portion;

wherein the trailing edge portion includes a monolithic structure including at least one receptacle configured to receive an insertion tool;

wherein the intermediate portion includes a plurality of elongate curved structural members;

wherein the plurality of elongate curved structural members includes one or more spiral members continuously formed with at least one of the leading edge portion and the trailing edge portion;

wherein the one or more spiral members are configured such that the intermediate portion remains substantially rigid under compressive forces during insertion of the leading edge portion between bone surfaces of a patient;

wherein at least one spiral member of the one or more spiral members has a central axis extending along a length of the spiral member; and

wherein the central axis of the at least one spiral member is offset from the central axis of the body.

2. The implant according to claim 1, wherein the one or more spiral members includes at least two spiral members extending from the leading edge portion to the trailing edge portion.

3. The implant according to claim 1, wherein the one or more spiral members include one or more substantially helical members.

4. The implant according to claim 3, wherein the substantially helical members extend longitudinally from the leading edge portion to the trailing edge portion of the implant.

5. The implant according to claim 1, wherein the receptacle includes female threading configured to receive male threading on an insertion tool.

6. The implant according to claim 1, wherein the body is substantially wedge-shaped.

7. The implant according to claim 6, wherein the implant is configured for implantation in an opening wedge osteotomy procedure.

8. The implant according to claim 6, wherein the implant is configured for implantation in a sacroiliac joint.

9. The implant according to claim 1, wherein the elongate curved structural members include at least one elongate curved structural member extending longitudinally from the leading edge portion to the trailing edge portion of the implant and having a substantially sinusoidal configuration.

10. The implant according to claim 1, wherein at least one of the one or more spiral members is a bone contacting member configured to contact at least one surface of the patient'"'"'s bone upon insertion of the implant between the bone surfaces.

11. The implant according to claim 1, further including at least one support beam extending between the leading edge portion and the trailing edge portion.

12. An implant, comprising:

a body having a leading edge portion, a trailing edge portion, and an intermediate portion extending between the leading edge portion and the trailing edge portion;

wherein the leading edge portion includes a substantially smooth surface forming a substantial majority of a leading edge surface of the leading edge portion;

the leading edge portion having an elongate configuration extending from a first end to a second end;

wherein the trailing edge portion includes a monolithic structure including at least one receptacle configured to receive an insertion tool;

the trailing edge portion having an elongate configuration extending from a first end to a second end; and

further including at least one elongate substantially spiral member extending from the first end of the leading edge portion to the first end of the trailing edge portion, thereby forming a perimeter portion of the implant extending between the leading edge portion and the trailing edge portion;

wherein the at least one elongate substantially spiral member is configured such that the intermediate portion remains substantially rigid under compressive forces during insertion of the leading edge portion between bone surfaces of a patient, so as to maintain spacing and orientation of leading edge portion and trailing edge portion with respect to one another during insertion.

13. The implant according to claim 12, wherein the body is substantially wedge-shaped.

14. The implant according to claim 13, wherein the implant is configured for implantation in an opening wedge osteotomy procedure.

15. The implant according to claim 12, further including at least one support beam extending between the leading edge portion and the trailing edge portion.

16. The implant according to claim 12, wherein the receptacle includes female threading configured to receive male threading on an insertion tool.

17. An implant, comprising:

a body having a leading edge portion, a trailing edge portion, and an intermediate portion extending between the leading edge portion and the trailing edge portion;

wherein the leading edge portion includes a substantially smooth surface forming a substantial majority of a leading edge surface of the leading edge portion;

the leading edge portion having an elongate configuration extending from a first end to a second end;

wherein the trailing edge portion includes a monolithic structure including at least one receptacle configured to receive an insertion tool; and

the trailing edge portion having an elongate configuration extending from a first end to a second end;

at least one support beam extending between the leading edge portion and the trailing edge portion; and

at least one elongate substantially helical member extending from the first end of the leading edge portion to the first end of the trailing edge portion, thereby forming a perimeter portion extending between the leading edge portion and the trailing edge portion;

wherein the at least one elongate substantially helical member is configured such that the intermediate portion remains substantially rigid under compressive forces during insertion of the leading edge portion between bone surfaces of a patient.

18. The implant according to claim 17, wherein the implant is configured for implantation in a sacroiliac joint.

19. The implant according to claim 17, further including at least one additional support beam extending between the leading edge portion and the trailing edge portion.

20. The implant according to claim 17, wherein the receptacle includes female threading configured to receive male threading on an insertion tool.