Implanted prosthetic device

• US 7,431,734 B2
• Filed: 02/06/2006
• Issued: 10/07/2008
• Est. Priority Date: 02/04/2005
• Status: Expired due to Fees

• Current Assignee: Intellistem Orthopaedic Innovations Incorporated
• Original Assignee: Intellistem Orthopaedic Innovations Incorporated
• Inventors: Danoff, Jonathan R., Bernheim, Jared E. D.
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US11/347,925
• Publication Number:
  US 20060190080A1
• Time in Patent Office: 974 Days
• Field of Search: 623/23.49, 623/18.12, 623 1611- 2363, 600 9- 15, 606 60- 75, 607 50- 52, 607/117
• US Class Current: 623/16.11
• CPC Class Codes: A61B 17/68 Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin bone staples A61B17/0642
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/8033 having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/30721 Accessories
• CPC Class Codes: A61F 2/30724 Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/367 Proximal or metaphyseal parts of shafts trochanteric devices connected to said proximal parts A61F2/30739
• CPC Class Codes: A61F 2/3676 Distal or diaphyseal parts of shafts
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/389 Tibial components A61F2/3868 takes precedence
• CPC Class Codes: A61F 2/40 for shoulders
• CPC Class Codes: A61F 2/4241 for hands, e.g. fingers
• CPC Class Codes: A61F 2002/2821 Bone stimulation by electromagnetic fields or electric current for enhancing ossification
• CPC Class Codes: A61F 2002/30064 Coating or prosthesis-covering structure made of biodegradable material
• CPC Class Codes: A61F 2002/30079 magnetic
• CPC Class Codes: A61F 2002/30087 piezoelectric
• CPC Class Codes: A61F 2002/302 : toroidal, e.g. rings
• CPC Class Codes: A61F 2002/30322 : differing in surface structures
• 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 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3631 : with an integral complete or partial peripheral collar or bearing shoulder at its base
• CPC Class Codes: A61F 2002/365 : Connections of heads to necks
• CPC Class Codes: A61F 2210/009 : magnetic
• CPC Class Codes: A61F 2230/0065 : toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2250/0026 : differing in surface structures
• 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: A61N 1/205 : for promoting a biological process
• CPC Class Codes: A61N 2/002 : in combination with another treatment

Abstract

An orthopedic device adapted for implantation into a body where it contacts bone tissue is disclosed which has at least one spaced apart polarized magnetic element, at least one piezoelectric element or a combination of a polarized magnetic element and a piezoelectric element which are in direct contact with one another or are separately mounted on the implant. The piezoelectric element being at least partially embedded in a surface of the device which contacts bone tissue for the promotion of osteogenesis or osseointegration.

Claims

1. An orthopedic device adapted for implantation into a body and contacting bone tissue, the device comprising:

a surface;

a plurality of spaced apart piezoelectric elements, each piezoelectric element having a top, bottom, and side, the piezoelectric elements being at least partially embedded in the surface, the piezoelectric elements also extending above the surface and being positioned to be in direct electrical contact with bone tissue for the stimulation of bone growth;

a plurality of insulators, each insulator insulating the side of an individual piezoelectric element, but not the top or bottom of the piezoelectric element;

a plurality of conductive elements, each conductive element located at the bottom of an individual piezoelectric clement.

2. The device of claim 1, further comprising a coating on the surface, the coating comprising hydroxyapatite.

3. The device of claim 2, further comprising beads on the surface.

4. The device of claim 1, further comprising beads on the surface.