BONE IMPLANT

• US 20100076503A1
• Filed: 02/07/2008
• Published: 03/25/2010
• Est. Priority Date: 02/07/2007
• Status: Abandoned Application

• Current Assignee: N.M.B. Medical Applications Ltd.
• Original Assignee: N.M.B. Medical Applications Ltd.
• Inventors: Beyar, Mordechay, Globerman, Oren, Einav, Elad
• Application Number:
  US12/526,266
• Publication Number:
  US 20100076503A1
• Time in Patent Office: Days
• US Class Current: 606/86.R
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1626 Control means; Display units
• CPC Class Codes: A61B 17/1631 Special drive shafts, e.g. flexible shafts A61B17/1642, A61B17/164 take precedence
• CPC Class Codes: A61B 17/1633 Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft A61B17/1644 takes precedence
• CPC Class Codes: A61B 17/1637 Hollow drills or saws producing a curved cut, e.g. cylindrical A61B10/025, A61B17/1695 take precedence
• CPC Class Codes: A61B 17/164 intramedullary
• CPC Class Codes: A61B 17/1642 for producing a curved bore
• CPC Class Codes: A61B 17/1644 using fluid other than turbine drive fluid
• CPC Class Codes: A61B 17/1668 for the upper femur A61B17/164 takes precedence
• CPC Class Codes: A61B 17/7095 the filler comprising unlinked macroscopic particles
• CPC Class Codes: A61B 17/7097 Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants disc prostheses made of inflatable chambers or pockets filled with fluid A61F2/441; replacing the nucleus pulposus A61F2002/444
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/7233 with special means of locking the nail to the bone
• CPC Class Codes: A61B 17/7258 with laterally expanding parts, e.g. for gripping the bone
• CPC Class Codes: A61B 17/7266 with fingers moving radially outwardly
• CPC Class Codes: A61B 17/7291 for small bones, e.g. in the foot, ankle, hand or wrist
• CPC Class Codes: A61B 17/742 having one or more longitudinal elements oriented along or parallel to the axis of the neck
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61B 2017/1648 : as cutting jet
• CPC Class Codes: A61B 2090/036 : abutting on tissue or skin
• CPC Class Codes: A61B 2217/005 : with suction drainage system
• CPC Class Codes: A61B 90/39 : Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2002/2825 : Femur
• CPC Class Codes: A61F 2002/2832 : Femoral neck
• CPC Class Codes: A61F 2002/30583 : filled with hardenable fluid, e.g. curable in-situ
• CPC Class Codes: A61F 2210/0085 : hardenable in situ, e.g. epoxy resins
• CPC Class Codes: A61F 2310/00353 : Bone cement, e.g. polymethylmethacrylate or PMMA

Abstract

A method of long bone strengthening and a composite implant for such strengthening. Also disclosed is a kit for building a composite implant in-situ in long bones. In an exemplary embodiment of the invention, the implant comprises a plurality of rigid tensile rods, in matrix of cement and surrounded by a partially porous bag.

Claims

1-45. -45. (canceled)

46. A method of preventive surgery, comprising:

(a) identifying a long bone in need of strengthening; and

(b) implanting a strengthening implant in said bone through an aperture formed in the bone.

47. A method according to claim 46, wherein said bone is a hip.

48. A method according to claim 46, wherein said bone is not indicated as fractured by said identifying.

49. A method according to claim 46, wherein implanting comprises binding at least two spaced apart reinforcing elements with a binding material.

50. A method according to claim 46, wherein said strengthening implant comprising a tension-resistant element.

51. A method according to claim 46, wherein said strengthening implant comprising a bend-resistant element.

52. A method according to claim 49, comprising selecting a personalized dimension for said implant for said bone.

53. A method according to claim 46, wherein said implant is configured to rest against a cortex of said bone at one end and in a middle section thereof.

54. A method according to claim 46, wherein identifying comprises providing a patient with a problem in one limb and treating both that limb and an opposing limb, by implantation of implants therein.

55. A method of preventive surgery, comprising:

(a) identifying a long bone in need of strengthening; and

(b) building, in situ, a strengthening implant formed of a hardening material and at least one reinforcing element, which reinforcing element is not adapted to anchor in bone.

56. A method according to claim 55, wherein building comprises:

(c) forming a void in said bone; and

(d) constructing said implant in said void.

57. A method according to claim 56, wherein forming a void comprises:

(e) forming a channel; and

(f) widening said channel.

58. A method according to claim 57, wherein widening said channel comprises cutting said channel using a cutting element.

59. A method according to claim 57, wherein forming a channel comprises forming a curved channel.

60. A method according to claim 57, wherein forming a void comprises forming a plurality of voids.

61. A method according to claim 57, wherein forming a void comprises forming a void having a distal end not contacting and within about 5 mm of a cortical bone.

62. A method according to claim 57, wherein constructing said implant comprises inserting at least one tensile element into said void and filling said void using cement.

63. A method according to claim 62, wherein inserting at least one tensile element comprises inserting a bag into which said cement is provided.

64. A method according to claim 62, wherein inserting at least one tensile element comprises inserting a second bag into said bag.

65. A method according to claim 63, wherein filling said void comprises eluting at least part of said cement out of said bag to form inter-digitations.

66. A method according to claim 63, wherein filling said void comprises eluting at least part of said cement out of said bag to form at least one bulbous anchor section.

67. A method according to claim 63, wherein inserting at least one tensile element, comprises inserting a plurality of tensile elements into said bag.

68. A method according to claim 63, wherein inserting at least one tensile element, comprises inserting a tensile element having at least one end in a cortex.

69. A method according to claim 63, wherein inserting at least one tensile element, comprises inserting said bag using a tensile element.

70. A method according to claim 62, wherein inserting at least one tensile element comprises inserting a bag into which said cement is provided.

71. A method according to claim 55, wherein said method is practiced by forming a hole having a maximal diameter of less than 5 mm.

72. A method according to claim 55, wherein said method is practiced by forming a hole having a maximal diameter of less than 3 mm.

73-101. -101. (canceled)

102. A method of constructing an implant comprising:

(a) forming an opening in cortical bone, which opening is less in diameter than a 30% of a diameter of said bone;

(b) inserting at least three non-expanding elements through said opening into said bone;

(c) completing said implant to have a diameter at least 3 times said opening diameter.

103. A method according to claim 102, wherein said non-expanding elements are elongate elements with a length to diameter ratio of greater than 3 to 1.