Minimally invasive modular support implant device and method

• US 20030171812A1
• Filed: 12/31/2001
• Published: 09/11/2003
• Est. Priority Date: 12/31/2001
• Status: Abandoned Application

• Current Assignee: Expandis Limited
• Original Assignee: Expandis Limited
• Inventors: Ben-Arye, Asaf, Ohana, Nissim, Grunberg, Ilan
• Application Number:
  US10/036,564
• Publication Number:
  US 20030171812A1
• Time in Patent Office: Days
• US Class Current: 623/17.11
• CPC Class Codes: A61B 17/8852 capable of being assembled or enlarged, or changing shape, inside the bone or disc
• CPC Class Codes: A61B 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61B 90/92 coded with colour
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30225 Flat cylinders, i.e. discs
• CPC Class Codes: A61F 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30331 made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2002/30383 made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• CPC Class Codes: A61F 2002/30401 with additional means for preventing or locking said sliding
• CPC Class Codes: A61F 2002/30599 stackable
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30677 Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
• CPC Class Codes: A61F 2002/448 comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0025 Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• 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 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0082 : parallelepipedal
• CPC Class Codes: A61F 2250/0063 : Nested prosthetic parts
• 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
• CPC Class Codes: A61F 2310/00161 : Carbon; Graphite
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF

Abstract

device and method are disclosed of a plate for use in conjunction with at least another one of a plurality of other plates in a modular reconstructing and supporting assembly for reconstructing and supporting a diseased or fractured bone or within a space previously occupied by a diseased intervertebral disc of a patient. The plate is sized small enough to be suitable for separate insertion into the bone or the space, preferably through a canule, and arrangement with the other plates adjacently one on top of the other to construct scaffolding, so as to provide a supporting prosthesis.

In another preferred embodiment the plate has at least two substantially opposite aspects with interlocking features designed to facilitate interlocking of adjacent plates so as to prevent or restrain their sliding off each other.

Claims

1. A modular reconstructing and supporting assembly for reconstructing and supporting a diseased or fractured bone or within a space previously occupied by a diseased intervertebral disc, the assembly comprising:

a plurality of plates adapted to be cooperatingly inserted into the bone, at least one of said plates arranged adjacently to another plate within said bone or space, to construct scaffolding for forming a supporting prosthesis.

2. The assembly of claim 1, wherein at least one of said plates having at least two substantially opposite aspects with interlocking features designed to facilitate interlocking of adjacent plates so as to prevent or restrain relative movement therebetween.

3. The assembly of claim 2, wherein the opposite aspects of the plate are inclined with respect to each other.

4. The assembly of claim 2, wherein one of said aspects is provided with at least one longitudinal protrusion and the opposite aspect is provided with at least one corresponding longitudinal recess designed to receive a longitudinal protrusion of an adjacent plate.

5. The assembly of claim 2, wherein one aspect is provided with at least one lateral protrusion and the opposite aspect is provided with at least one corresponding lateral recess designed to accommodate a lateral protrusion of an adjacent plate.

6. The assembly of claim 2, wherein one aspect is provided with at least one longitudinal protrusion and at least one lateral protrusion and the opposite aspect is provided with at least one corresponding longitudinal recess designed to accommodate a longitudinal protrusion of an adjacent plate, and with at least one corresponding lateral recess designed to accommodate a lateral protrusion of an adjacent plate.

7. The assembly of claim 2, wherein the interlocking features include at least one recess on one aspect and at least one corresponding projection on the other aspect, so that the projection of one plate is accommodatable in the recess of an adjacent plate.

8. The assembly of claim 7, wherein the recess further comprises a rim adapted for retaining the projection of an adjacent plate, for preventing or restraining relative displacement therebetween.

9. The assembly of claim 8, wherein the rim extends along a portion of the circumference of the recess, allowing leveled sliding in of the projection of the adjacent plate.

10. The assembly of claim 1, wherein at least one of said plurality of plates is curved.

11. The assembly of claim 1, wherein the plate is provided with at least one tapered end, for facilitating plate guidance and positioning between two adjacent plates.

12. The assembly of claim 11, wherein the tapered end is in the form of a wedge.

13. The assembly of claim 1, wherein the plate is made from or coated with biocompatible material.

14. The assembly of claim 1, wherein the plate is made from material selected from a group consisting of metal, titanium, steel 316, processed foil, hydroxyapatite, plastics, silicon, composite materials, carbon-fiber, or a combination thereof.

15. The assembly of claim 1 wherein at least one of said plates is coated with hydroxyapetite

16. The assembly of claim 1, wherein the plate is covered with a bone growth encouraging substance.

17. The assembly of claim 1 wherein said plate being is coated with bone morphogenic protein.

18. The assembly of claim 1, wherein the plate is coated with medication.

19. The assembly of claim 1, wherein said plate is coated with a substance selected from the group consisting of antibiotics, slow releasing medication, chemotherapic substances, or a combination thereof.

20. The assembly of claim 1, wherein the plate comprises non-ferrous material.

21. The assembly of claim 1, wherein the plate is coated with lubricating material to facilitate sliding the plates into a desired position.

22. The assembly of claim 1, wherein the plate is coated with coating materials that sublime or react to form a solid conglomerate.

23. The assembly of claim 1, wherein the plate is substantially disc-shaped.

24. The assembly of claim 23, wherein the plate is provided with a groove adapted to be engaged by a holding tool.

25. The assembly of claim 23, further comprising a pin protruding from at least one of said plates, to facilitate placement of said plate.

26. The assembly of claim 1, wherein at least one of said plates having a rough external surface.

27. A plate for use in conjunction with at least another one of a plurality of other plates in a modular reconstructing and supporting assembly for reconstructing and supporting a diseased or fractured bone or within a space previously occupied by a diseased intervertebral disc of a patient, the plate sized small enough to be suitable for separate insertion into the bone or the space and arrangement with the other plates adjacently to construct scaffolding, so as to provide a supporting prosthesis.

28. A method for reconstructing and supporting within a diseased or fractured bone or within a space previously occupied by a diseased intervertebral disc the method comprising:

inserting a plurality of plates into the bone

arranging said plates adjacent one another, within the bone or

space, to construct a support scaffolding.

29. The method of claim 28 further comprising the steps of delivering each plate separately into the bone using low profile delivery means, through a small incision in the skin of the patient, and arranging adjacent plates on top of each other.

30. The method of claim 28, wherein the bone is a vertebra and the plates are inserted through a bore drilled into the body of the vertebra through a pedicle of the vertebra.

31. The method of claim 30, wherein the diameter of the bore is in a range between 4 to 8 mm.

32. The method of claim 29, wherein the delivery means comprises a canula and a rod with which the plates are each advanced through the canula.

33. The method of claim 32, wherein the rod is provided with holding means to hold the plates.

34. The method of claim 28, wherein at least one of said plates having at least two substantially opposite aspects with interlocking features designed to facilitate interlocking of adjacent plates, for preventing or restraining relative displacement therebetween.

35. The method of claim 34, wherein one aspect is provided with at least one longitudinal protrusion and the opposite aspect is provided with at least one corresponding longitudinal recess designed to accommodate the longitudinal protrusion of an adjacent plate.

36. The method of claim 33, wherein one aspect is provided with at least one lateral protrusion and the opposite aspect is provided with at least one corresponding lateral recess designed to accommodate the lateral protrusion of an adjacent plate.

37. The method of claim 33, wherein one aspect is provided with at least one longitudinal protrusion and at least one lateral protrusion and the opposite aspect is provided with at least one corresponding longitudinal recess designed to accommodate the longitudinal protrusion of an adjacent plate, and with at least one corresponding lateral recess designed to accommodate the lateral protrusion of an adjacent plate.

38. The method of claim 34, wherein the interlocking features include at least one recess on one aspect and at least one corresponding projection on the other aspect, so that the projection of one plate is accommodated in the recess of an adjacent plate.

39. The method of claim 28, wherein at least one of said plurality of plates is provided with at least one tapered end, to facilitate positioning the plate between two adjacent plates.

40. The method of claim 28, wherein at least one of said plurality of plates is substantially disc-shaped.

41. The method of claim 28, wherein at least one of said plurality of plates is further provided with a protruding pin, adapted to facilitate holding the plate by a delivering tool.

42. The method of claim 30, wherein the plates are inserted bilaterally constructing at least two scaffolding structures within a vertebral body.

43. The method of claim 28, wherein the plates are positioned one on top of the other.

44. A method for reconstructing and supporting within a diseased or fractured bone or within a space previously occupied by a diseased intervertebral disc the method comprising:

providing a plurality of plates adapted to be separately inserted into the bone and arranged adjacently within the bone or space to construct scaffolding for providing support;

providing delivery means having low profile for delivering each plate through a small incision in the skin of the patient and into the bone or disc;

delivering each plate separately into the bone;

arranging the plates one adjacent the other.