Hip and knee joint assemblies incorporating debris collection architecture between the ball and seat interface

• US 9,539,097 B2
• Filed: 05/21/2014
• Issued: 01/10/2017
• Est. Priority Date: 11/08/2007
• Status: Expired due to Fees

• Current Assignee: Linares Medical Devices, LLC, Miguel A., Mr. Lianares
• Original Assignee: Linares Medical Devices, LLC
• Inventors: Linares, Miguel A., Linares, Miguel A. Jr., Greene, Ryan T.
• Primary Examiner(s): Sevilla, Christian
• Assistant Examiner(s): Mathew, Seema
• Application Number:
  US14/283,795
• Publication Number:
  US 20140296991A1
• Time in Patent Office: 965 Days
• Field of Search: 623/22.17
• US Class Current: 1/1
• CPC Class Codes: A61F 2/30 Joints
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/38 for elbows or knees
• CPC Class Codes: A61F 2/3804 for elbows
• CPC Class Codes: A61F 2002/30673 Lubricating means, e.g. synovial pocket
• CPC Class Codes: A61F 2002/30682 Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
• CPC Class Codes: A61F 2002/30683 Means for collecting wear particles in a hollow cavity inside the prosthesis
• CPC Class Codes: A61F 2002/30685 Means for reducing or preventing the generation of wear particulates
• CPC Class Codes: A61F 2002/30686 Devices for removing particulate debris from prosthetic joints
• CPC Class Codes: A61F 2002/30807 Plurality of blind bores
• CPC Class Codes: A61F 2002/30823 having the shape of a reverse dovetail
• CPC Class Codes: A61F 2002/30827 Plurality of grooves
• CPC Class Codes: A61F 2002/30934 Special articulating surfaces
• CPC Class Codes: A61F 2002/30937 with cut-outs
• CPC Class Codes: A61F 2002/30971 Laminates, i.e. layered products

Abstract

A joint implant assembly including a spherical shaped component adapted to securing to an end of a first joint defining bone and a recess shaped component adapted to securing to an end of a second joint defining bone. Each of the components establishes an opposing wear surface, at which microscopic sized particles build up over time resulting from prolonged use of the joint. At least one of the spherical and recess shaped components exhibits a plurality of interior entrapment chambers, each of which including a narrow-most entranceway location communicating with the wear surface. The entrapment chambers further exhibit outwardly widening capture profiles extending within the associated component for securing volumes of the microscopic particles away from a zone defined between the wear surfaces.

Claims

1. A joint implant assembly, comprising:

a spherical shaped component adapted to securing to an end of a first joint defining bone;

semi-spherical shaped component adapted to securing to an end of a second joint defining bone and within which is seated said spherical shaped component in inter-articulating supported fashion;

each of said components establishing an opposing wear surface at which microscopic sized particles abraded from said components build up over time resulting from prolonged use of said joint; and

a plurality of elongated and conical shaped entrapment chambers distributed across said semi-spherical shaped component, each of said chambers including a narrow-most diameter entranceway location communicating with said wear surface corresponding to a smallest diameter, said entrapment chambers each exhibiting progressively outwardly widening capture profiles extending away from said narrow-most entranceway locations through a first layer of said semi-spherical shaped component in an outwardly radial dispersed manner and so that a diameter of each of said entrapment chambers at any location farther away from said entranceway location is larger than a corresponding diameter at any location closer to said entranceway location, said entrapment chambers each terminating at a reverse surface of said first layer defining a thickness of said first layer in contact with a substrate mounting layer, such that a maximum diameter location of each entrapment chamber is located at an interface with said substrate layer for securing volumes of said microscopic particles passing through said narrow-most entranceway locations, and in order to segregate said particles away from a wear zone defined between said wear surfaces.

2. The implant assembly as described in claim 1, said implant assembly further comprising a hip joint assembly.

3. The implant assembly as described in claim 2, further comprising said spherical shaped component mounted atop an affixing stem.

4. The implant assembly as described in claim 1, said spherical and recessed components constructed of at least one of a metal, plastic, ceramic or composite thereof.

5. A joint implant assembly, comprising:

a spherical shaped component mounted atop a stem and adapted to securing to an end of a first joint defining bone;

a semi-spherical shaped component adapted to securing to an end of a second joint defining bone and within which is seated said spherical shaped component in inter-articulating supported fashion;

each of said components establishing an opposing wear surface at which microscopic sized particles abraded from said components build up over time resulting from prolonged use of said joint; and

a plurality of elongated and conical shaped entrapment chambers distributed across said spherical shaped component, each of said chambers including a narrow-most diameter entranceway locations communicating with said wear surface corresponding to a smallest diameter, said entrapment chambers each exhibiting progressively inwardly widening capture profiles extending away from said narrow-most entranceway locations and through said spherical shaped component and so that a diameter of each of said entrapment chambers at any location farther away from said entranceway location is larger than a corresponding diameter at any location closer to said entranceway location, said entrapment chambers each terminating at an opposite inner surface of said spherical shaped component defining a thickness thereof, said stem inserting into said inner surface of said spherical shaped component and so that said profiles are radially directed toward said stem, such that a maximum diameter location of each entrapment chamber is located at an interface with said stem for securing volumes of said microscopic particles passing through said narrow-most entranceway locations, and in order to segregate said particles away from a wear zone defined between said wear surfaces.

6. A joint implant assembly, comprising:

a concave seat component mounted to a pedestal supporting stem adapted to securing to a reconditioned end of a first joint defining bone, said concave seat component including a first exposed layer exhibiting first and second lateral recessed locations, said seat component further including a second planar base formed with said stem and upon which said concave seat is secured;

an inter-articulating component incorporated into a second joint defining bone and having a pair of convex end surfaces adapted to being received upon said lateral recessed locations of said first layer;

each of said components establishing an opposing wear surface at which microscopic sized particles abraded from said components build up over time resulting from prolonged use of said joint; and

a plurality of elongated and conical shaped entrapment chambers distributed across each of said lateral recessed locations, each of said chambers including a narrow-most diameter entranceway locations communicating with said wear surface corresponding to a smallest diameter, said entrapment chambers each exhibiting progressively inwardly widening capture profiles extending away from said narrow-most entranceway locations and through said first exposed layer and so that a diameter of each of said entrapment chambers at any location farther away from said entranceway location is larger than a corresponding diameter at any location closer to said entranceway location, said entrapment chambers each terminating at a reverse surface of said exposed layer defining a thickness of said first layer in contact with said planar base, such that a maximum diameter location of each entrapment chamber is located at an interface with said planar base for securing volumes of said microscopic particles passing through said narrow-most entranceway locations, and in order to segregate said particles away from a wear zone defined between said wear surfaces.

7. The implant assembly as described in claim 6, further comprising said entrapment chambers each exhibiting circular or polygonal cross sectional profiles.

8. The implant assembly as described in claim 6, further comprising said entrapment chambers each exhibiting continuous perimeter extending and concentrically spaced apart boundary profiles.

9. The implant assembly as described in claim 6, further comprising said entrapment chambers each exhibiting linear and angularly bisecting grid profiles.

10. The implant assembly as described in claim 6, further comprising said entrapment chambers each exhibiting ring shaped capture profiles.

11. The implant assembly as described in claim 10, said ring shaped entrapment chambers intercommunicating along selected boundary locations.