Method and apparatus for use of a non-invasive expandable implant

• US 7,485,149 B1
• Filed: 10/06/2003
• Issued: 02/03/2009
• Est. Priority Date: 10/06/2003
• Status: Expired due to Fees

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: White, John R.
• Primary Examiner(s): McDermott; Corrine
• Assistant Examiner(s): Prone; Christopher D
• Application Number:
  US10/679,815
• Time in Patent Office: 1,947 Days
• Field of Search: 623 2014- 2016, 623 2024- 2025, 623/20.29, 623 2035- 2036, 623 2344- 2345, 623/23.47, 606 62- 63, 606/73, 606/95, 606/68, 606/70, 606/71, 606/105
• US Class Current: 623/23.47
• CPC Class Codes: A61B 17/7216 for bone lengthening or compression A61B17/7258 takes precedence
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/385 also provided with condylar bearing surfaces
• CPC Class Codes: A61F 2002/2825 Femur
• CPC Class Codes: A61F 2002/2892 Tibia
• CPC Class Codes: A61F 2002/30332 Conically- or frustoconically-shaped protrusion and recess
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30601 telescopic
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30897 Stepped protrusions, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

Abstract

The present invention relates to a non-invasive expandable implant utilizing energy from an epiphyseal growth plate of a human long bone to expand the implant. A bone replacement section includes a housing, an expansion shaft, a connection system, and an implant member. An anchoring member is secured to the second bone portion and spaced from the implant member. The expansion shaft is configured to translate a first distance between the housing and the first bone member. Growth of the bone causes an increase of a second distance between an implant portion and the anchoring member. The increase of the second distance causes the anchoring member to exert a force on a connection system causing an increase of the first distance, thus expanding the implant.

Claims

1. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement configured to be secured to the first bone portion;

an anchoring member configured to be secured to the second bone portion; and

a connection system including a cable that connects said bone replacement to said anchoring member, wherein said connection system is configured to expand said bone replacement in response to a force exerted by said anchoring member due to the growth of the second bone portion,

wherein said bone replacement includes an articulable joint that connects the first bone portion to the second bone portion.

2. The device of claim 1, wherein a first bone includes the first bone portion and the second bone portion.

3. The device of claim 1, wherein said bone replacement includes an expansion shaft that is configured to translate within a housing and is adapted to connect to the first bone portion.

4. The device of claim 3, wherein said expansion shaft translates in said housing a first distance and the second bone portion grows a second distance.

5. The device of claim 1, wherein said bone replacement is configured to prevent an additional application of force on said connection system when said joint is in one of a flexion condition, an extension condition, and a plurality of positions between said flexion condition and said extension condition.

6. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement configured to be secured to the first bone portion;

an anchoring member configured to be secured to the second bone portion; and

a connection system including a flexible connector that connects said bone replacement to said anchoring member, wherein said connection system is configured to expand said bone replacement in response to a force exerted by said anchoring member due to the growth of the second bone portion,

wherein said bone replacement includes an expansion shaft that is configured to translate within a housing and is adapted to connect to the first bone portion,

wherein said expansion shaft translates in said housing a first distance and the second bone portion grows a second distance, and

wherein a first increase in said first distance is caused by a second increase in said second distance.

7. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement configured to be secured to the first bone portion;

an anchoring member configured to be secured to the second bone portion;

a connection system including a flexible connector that connects said bone replacement to said anchoring member, wherein said connection system is configured to expand said bone replacement in response to a force exerted by said anchoring member due to the growth of the second bone portion; and

a bearing component that is configured to engage said bone replacement and adapted to secure to the second bone portion.

8. The device of claim 7, wherein said bearing component further includes a cannulated portion through which the connection system passes.

9. The device of claim 8, wherein said bearing component is a tibial resurfacing component.

10. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement configured to be secured to the first bone portion;

an anchoring member configured to be secured to the second bone portion; and

a connection system configured to connect said bone replacement to said anchoring member,

wherein said connection system is configured to expand said replacement section in response to the growth of the second bone portion, and

wherein said connection system includes a cable that connects said bone replacement to said anchoring member and transmits a force from said anchoring member to said bone replacement to expand said bone replacement.

11. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement section having a housing, an expansion shaft, a connection system and an implant member; and

an anchoring member secured to the second bone portion and spaced from said implant member,

wherein said expansion shaft is configured to translate within said housing a first distance and is adapted to connect to the first bone portion, said first distance between said housing and the first bone member,

wherein said implant member is configured to be secured to at least a portion of the second bone portion and includes a cannulated portion through which said connection system passes,

wherein growth of the second bone portion causes an increase of a second distance between said implant portion and said anchoring member, said increase of said second distance causes said anchoring member to exert a force on said connection system causing an increase of said first distance,

wherein said connection system includes a flexible connector secured to said anchoring member and connected to said expansion shaft,

wherein movement of said anchoring member causes movement of said expansion shaft and

wherein said bone replacement section further includes an articulable joint.

12. The bone device of claim 11, wherein said cable includes a plurality of projections that meshingly engage said expansion shaft.

13. The bone device of claim 11, wherein said connection system includes an anti-collapse device.

14. The bone device of claim 11, wherein the anchoring member includes an anchor plug that is fixedly secured to an intramedullary canal of the second bone portion with at least one of mechanical threads, bonding, mechanical fasteners, and combinations thereof.

15. The bone device of claim 11 further comprising an intramedullary stem capable of being secured to the first bone portion.

16. The bone device of claim 15, wherein said expansion shaft is configured to releaseably connect to said intramedullary stem.

17. The bone device of claim 15, wherein said intramedullary stem is modular and adapted to fit variable sizes of an intramedullary canal.

18. The bone device of claim 11, wherein said first bone portion is a femur and the second bone portion is a tibia.

19. The implant of claim 18, wherein the housing comprises a distal femoral replacement.

20. The implant of claim 18, wherein the anchoring member is configured to be secured to a tibial intramedullary canal.

21. The implant of claim 18, wherein the second bone implant is configured to be a resurfacing tibial component.

22. The implant of claim 11, wherein said housing includes a distal femoral replacement and said bone implant includes a resurfacing tibial component.

23. The implant of claim 22, wherein said articulable joint includes a cannulated portion through which the connection system passes.

24. The implant of claim 23, wherein said cannulated portion is configured to prevent tension of said connection system by flexion and extension of said articulable joint.

25. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement section having a cannulated articulable joint member connecting the first bone portion to the second bone portion,

an anchoring member configured to be secured to the second bone portion; and

a connection system including a flexible connector that connects said bone replacement to said anchoring member,

wherein said connection system is configured to expand said bone replacement section in response to a force exerted by said anchoring member due to the growth of the second bone portion; and

wherein said articulable cannulated joint is configured to prevent additional application of tension on said connection system by the said articulable cannulated joint.

26. A non-invasive expandable bone device adapted to be in a first bone portion of a patient that is capable of using growth of a second bone portion to elongate the first bone portion, the device comprising:

a bone replacement section having a housing, an expansion shaft, a connection system and an implant member;

an anchoring member capable of being secured to the second bone portion and spaced from said implant member; and

an intramedullary stem capable of being secured to the first bone portion,

wherein said expansion shaft is configured to translate within said housing a first distance and is adapted to connect to the first bone portion, said first distance is between said housing and the first bone member,

wherein said implant member is configured to be secured to at least a portion of the second bone portion and includes a cannulated portion through which said connection system passes,

wherein growth of the second bone portion causes an increase of a second distance between said implant member and said anchoring member, said increase of said second distance causes said anchoring member to exert a force on said connection system causing an increase of said first distance,

wherein said connection system includes a cable secured to said anchoring member and connected to said expansion shaft, and

wherein movement of said anchoring member causes movement of said expansion shaft.

27. The bone device of claim 26, wherein said expansion shaft is configured to releaseably connect to said intramedullary stem.

28. The bone device of claim 26, wherein said intramedullary stem is modular and adapted to fit variable sizes of an intramedullary canal.