Finger Bone Patents (Class 623/21.15)
  • Patent number: 8167953
    Abstract: Thumb carpometacarpal (CMC) joint implants include a trapezium implant defining an articulating surface and a cooperating first metacarpal implant with a base portion of the first metacarpal defining an articulating surface. The first metacarpal base articulating-surface is configured to articulate against the trapezium implant articulating surface.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: May 1, 2012
    Assignee: Piper Medical, Inc.
    Inventor: Mark J. Warburton
  • Patent number: 8100983
    Abstract: Generally, an intra-osseous fusion system which provides an implantable intra-osseous member and a method of implanting the intra-osseous member for bone on growth which retains an amount of digit curvature.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: January 24, 2012
    Inventor: Robert C. Schulte
  • Publication number: 20120016484
    Abstract: In a finger joint prosthesis comprising a joint body 14 having first and second joint elements which are connected together pivotably about an axis of rotation and from which a respective anchoring bar 30, 32 extends for securing to a proximal and/or distal phalanx, wherein the anchoring bars 30, 32 can have one or more securing eyes 40, 42, 44 with openings for receiving fixing screws. To provide improved primary and secondary fixing it is proposed that an end securing element is provided distally from the axis of rotation on the anchoring bar 30, 32 of at least one joint element.
    Type: Application
    Filed: July 13, 2011
    Publication date: January 19, 2012
    Applicant: WALDEMAR LINK GMBH & CO. KG
    Inventor: Helmut LINK
  • Publication number: 20110288550
    Abstract: A system, devices and methods for performing an osteotomy on a bone of a multi-axis joint are provided. A cutting guide system is provided for performing one or more cuts to the bone, using the articular surfaces of the articulating bones as a reference. If desired, a prosthesis can be used to emulate the osteotomy and substitute for a damaged articular surface of a bone of a multiaxis joint.
    Type: Application
    Filed: May 24, 2011
    Publication date: November 24, 2011
    Applicant: SKELETAL DYNAMICS LLC
    Inventors: Jorge L. Orbay, Thomas H. Norman, Ronald Litke
  • Publication number: 20110257755
    Abstract: An orthopaedic implant (2) used in arthroplasty of the fingers comprises a first element (3) for a proximal phalanx (4) and a second element (5) for an adjacent distal phalanx (6), each element having a respective stem (7, 8) for implantation in the bone and an interphalangeal articulation head (9, 10), the head (9) of the first element having a biconvex surface (11) of articulation, with a central valley (12), and the head (10) of the second element having a biconcave surface (13) of articulation designed to cooperate with said convex surface and comprising a central crest (14). At rest, the surfaces (11, 13) are congruent in the frontal plane of the articulation in the area of the condyles and non-congruent in the sagittal plane.
    Type: Application
    Filed: January 8, 2010
    Publication date: October 20, 2011
    Inventors: Philippe Bellemere, Thierry Dreano, Jean Goubau, Xavier Martinache, Michaël Papaloizos, Bernard Prandi, Pierre Siret, Alain Tchurukdichian
  • Patent number: 8021431
    Abstract: Basal thumb joint implant has a head with a smooth, generally hemispherical, medio-proximally directed, articulating surface, and a generally abrupt, distally directed, truncation thereto; and a stem attached to the head, which arises from the truncation of the head and includes at least one of the following features: A) a general angle of attachment to the head which is acute in relation to the truncation of the head; B) a flanged cross-sectional stem profile; C) an inwardly curved stem; D) an eccentric head attachment site for the stem. The implant may be one-piece or modular in construction.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: September 20, 2011
    Assignee: BioPro, Inc.
    Inventor: Charles O. Townley
  • Publication number: 20110184527
    Abstract: A modular proximal interphalangeal joint implant assembly including a first stem component, a second stem component, and an articulation assembly. The first stem component includes a first locking device and is operable to be implanted in a proximal phalanx bone. The second stem component includes a second locking device and is operable to be implanted in a middle phalanx bone. The articulation assembly includes a first articulation component operable to be removably attached to the first locking device and a second articulation component operable to be removably attached to the second locking device. The articulation assembly can include a semi-constrained articulation assembly or a constrained articulation assembly.
    Type: Application
    Filed: January 28, 2010
    Publication date: July 28, 2011
    Applicant: BIOMET MANUFACTURING CORP.
    Inventor: Thomas M. Vanasse
  • Publication number: 20110172782
    Abstract: A hemi-arthroplasty implant (11) joint replacement for the base of the first metacarpal of the CMC joint is created which can effectively restore and reestablish functional joint mechanics. The implant (11) has a unique head section (13) creating a particular interrelation between a spherical head articular surface (19), that is received in a surgically prepared cavity in the trapezium, wherein a supporting neck (21) in a re-entrant region joins the head to a flat, generally oblong collar (15).
    Type: Application
    Filed: September 17, 2009
    Publication date: July 14, 2011
    Applicant: Ascension Orthopedics, Inc.
    Inventors: Jerome J. Klawitter, Joseph P. Ritz, Monti R. Gourley, Ashley Degrood
  • Publication number: 20110112652
    Abstract: The present invention relates to a joint prosthesis (1) comprising two prosthesis components (2, 3) intended to be applied respectively to the trapezium (38) and the first metacarpal bone (39) of a thumb joint, each prosthesis component having a first or second screw-like part (4, 5) intended to be screwed firmly or be fastened to one of said bones (38 or 39) by means of bone cement, the one prosthesis component (2) having an articulating socket element (6) and the other prosthesis component (3) an articulating ball element (7). The fact that at least the prosthesis component (2) with the socket element (6) has an abutment portion (20) for abutment against the bone to which the screw-like part (4) of the prosthesis component is intended to be firmly screwed or be fastened by means of bone cement, normally the trapezium (38), prevents this prosthesis component from sinking into said bone.
    Type: Application
    Filed: May 5, 2009
    Publication date: May 12, 2011
    Inventors: Henrik Hansson, Lars Oster, Etzner Mikael
  • Publication number: 20110106269
    Abstract: Thumb carpometacarpal (CMC) joint implants include a trapezium implant defining an articulating surface and a cooperating first metacarpal implant with a base portion of the first metacarpal defining an articulating surface. The first metacarpal base articulating-surface is configured to articulate against the trapezium implant articulating surface.
    Type: Application
    Filed: January 13, 2011
    Publication date: May 5, 2011
    Inventor: Mark J. Warburton
  • Publication number: 20110004315
    Abstract: The present invention relates to methods for making oxidation resistant medical devices that comprise polymeric materials, for example, ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making antioxidant-doped medical implants, for example, doping of medical devices containing cross-linked UHMWPE with vitamin E by diffusion and materials used therein.
    Type: Application
    Filed: September 15, 2010
    Publication date: January 6, 2011
    Applicants: The General Hospital Corporation, Cambridge Polymer Group, Inc.
    Inventors: Orhun K. MURATOGLU, Stephen H. Spiegelberg
  • Patent number: 7842091
    Abstract: An implantable replacement joint includes first and second components having respective bores, and a flexible member within a cavity formed by the respective bores.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: November 30, 2010
    Assignees: Grampian University Hospitals NHS Trust, University of Aberdeen
    Inventors: Alan John Johnstone, Duncan Eoin Thomson Shepherd
  • Patent number: 7837739
    Abstract: An interpositional biarticular disk implant (11) having a circular peripheral rim, a generally toroidal axial center opening (13) and convex upper and lower surfaces (15, 17) is implanted between resected concave surfaces of the metacarpal base and the trapezium or other carpal bone in a CMC joint replacement. The disk (11) is anchored in operative position through the use of a flexible cord, such as a harvested tendon that passes through the center opening (13) and through osseous passageways created in the two facing bones.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: November 23, 2010
    Assignee: Ascension Orthopedics, Inc.
    Inventor: William F. Ogilvie
  • Patent number: 7780737
    Abstract: The invention relates to a system which is used to replace ball bone joints. The inventive system consists of: a bone anchoring shell (1) comprising a smooth articular surface (7) on the inner concave face thereof; a prosthesis (5) comprising a polished ball (4) and a neck (6) which is characterised in that it is smooth and slightly flared, in order to enable a wear-free low friction movement; and a mobile articular cup (3) which slides (i) on the ball (4) and the neck (6) of a prosthesis (5) and (ii) in the smooth cavity (7) of the bone anchoring shell (1) and which is characterised in that the opening (8) in said cup (3) tapers towards the center thereof, with an inside diameter (9) of equal to or less than that of the ball (4), such that the flared part adapts perfectly to the flared neck (6) in all of the respective positions of the mobile parts.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: August 24, 2010
    Assignees: Ortho ID
    Inventors: Olivier Bonnard, Philippe Bauchu, Alain Cypres, Arnaud Fiquet, Philippe Girardin, Daniel Noyer, Jean-Pierre Moulin, Christophe Roy
  • Publication number: 20100191343
    Abstract: The invention relates to a prosthetic finger (1) with a proximal member (10), a medial member (20) and a distal member (30) that are mounted pivotably on one another, and with a motor (40) which is arranged in the prosthetic finger (1) and which, via a gear mechanism, rotates the medial member (20) relative to the proximal member (10), said medial member (20) accommodating a longitudinally movable balance arm (90) which is connected via levers (91, 93) to the proximal member (10) and to the distal member (30).
    Type: Application
    Filed: January 31, 2008
    Publication date: July 29, 2010
    Inventors: Gregor Puchhammer, Martin Haslinger
  • Publication number: 20100161068
    Abstract: The invention relates to a joint part prosthesis, particularly for a finger joint, consisting either of a proximal or a distal component as well as a shaft extending away from this component, to be mounted in a bone. The invention provides that the shaft (4) is at least partially formed as an expansion sleeve (7).
    Type: Application
    Filed: May 9, 2008
    Publication date: June 24, 2010
    Inventors: Nicola Lindner, Cliff-Georg Reitzig, Stephan Eckhof, Thomas Feldhaus
  • Publication number: 20100137994
    Abstract: The invention relates to a joint part prosthesis, particularly for a finger joint, consisting of either a proximal or a distal component, as well as a shaft that extends away from this component, to be mounted in a bone, which shaft is configured with a fin-like anti-twist device. According to the invention, it is provided that as an anti-twist device (7), at least two anti-twist elements (8) are disposed on the mantle surface (6) of the shaft (4), with rotation symmetry, and extend radially away from this mantle surface (6) and in the longitudinal direction of the shaft (4), whereby the distance of the anti-twist elements (8) from the mantle surface (6) decreases slightly in the direction toward the free end (5) of the shaft (4).
    Type: Application
    Filed: May 9, 2008
    Publication date: June 3, 2010
    Inventors: Nicola Lindner, Stephan Eckhof, Thomas Feldhaus
  • Publication number: 20100106254
    Abstract: The concepts disclosed herein offer a new simple and reliable reconstructive option for the treatment of first carpal-metacarpal joint (basal joint) arthritis and consists of an intra-articular basal joint stabilizer sling combined with a surgical method of implantation.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 29, 2010
    Inventor: Jeanne L. DelSignore
  • Publication number: 20100082112
    Abstract: A finger joint prosthesis is provided including a joint body having first and second joint elements, which are connected together pivotably about a rotary axis and from each of which extends an anchoring bar for fixing to a proximal and/or distal phalanx. The anchoring bars have eyes with openings for receiving fixing screws. To increase stability, it is proposed that the first joint element have an external hollow body with an insertion opening that the second joint element have an internal hollow body, and that the internal hollow body in the position of installation can be inserted by way of the insertion opening relatively movably into the external hollow body. A spindle can be inserted in the position of installation into the internal hollow body for rotationally movable connection to the external hollow body.
    Type: Application
    Filed: February 21, 2008
    Publication date: April 1, 2010
    Applicant: WALDEMAR LINK GMBH & CO. KG
    Inventors: Arnold Keller, Christoph Ranft
  • Publication number: 20100057214
    Abstract: An arthrodesis implant is for a finger joint of a hand of a patient. The arthrodesis implant may include an extramedullary proximal anchor including a first member having a fastener-receiving passageway therethrough to receive a fastener to anchor the first member to an extramedullary portion of a proximal bone of the finger joint of the hand of the patient. The arthrodesis implant may also include an intramedullary distal anchor having a second member for being anchored within an intramedullary portion of a distal bone of the finger joint of the hand of the patient, and a coupling for securing the first and second members together.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 4, 2010
    Applicant: Mimedx, Inc., Corporation of the State of Florida
    Inventors: Thomas James GRAHAM, H. Brent BAMBERGER DO, James Howard CALANDRUCCIO, James HIGGINS, Thomas A. WIEDRICH, Louise M. FOCHT
  • Publication number: 20100057215
    Abstract: An arthroplastic implant is for a basilar joint of a hand of a patient. The arthroplastic implant may include a body having a distal surface and a proximal surface opposite therefrom with the distal surface to be positioned adjacent a first metacarpal bone at the basilar joint of the hand of the patient. The arthroplastic implant may also include an anchor peg extending outwardly from the body to anchor the body within the basilar joint of the hand of the patient.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 4, 2010
    Applicant: Mimedx Inc.
    Inventor: Thomas James GRAHAM
  • Publication number: 20100057213
    Abstract: An arthroplastic implant for a basilar joint of a hand of a patient includes a body having a distal surface and a proximal surface opposite therefrom. The distal surface is to be positioned adjacent a first metacarpal bone at the basilar joint of the hand of the patient. The arthroplastic implant also includes a shield extending outwardly from the distal surface of the body to shield adjacent portions of the first metacarpal bone and a second metacarpal bone of the hand of the patient.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 4, 2010
    Applicant: Mimedx Inc., Corporation of the State of Florida
    Inventors: Thomas James GRAHAM, H. Brent BAMBERGER DO, James Howard CALANDRUCCIO, Thomas A. WIEDRICH, Louise M. FOCHT
  • Publication number: 20100010637
    Abstract: This present invention concerns a trapezian or trapezo-metacarpal implant (1) that includes a rod (2) and a head (3) that are respectively intended to be inserted into the metacarpus (4) of the thumb, and to be anchored in a space that is created in particular by removing at least a portion of the trapezius (5). According to the invention, the rod (2) and the head (3) of the implant are independent of each other, and are designed to fit together with each other at least at one end (2a) of the rod, through the use of complementary connecting means (6, 34) allowing movement of the head with at least one degree of freedom in rotation, in relation to the rod and the said head (3), including rotation means (32) in the said space obtained by removing at least a portion of the trapezius (5).
    Type: Application
    Filed: February 1, 2008
    Publication date: January 14, 2010
    Inventor: Jean-Pierre Pequignot
  • Patent number: 7641696
    Abstract: Hemi joint replacements for the base of the first metacarpal of the CMC joint are provided which can effectively restore and reestablish functional joint mechanics while preserving the soft tissues that contribute to joint stability and function. The implants have a unique head shape with a saddle-like articular surface that is shaped somewhat similar to a conventional bicycle seat. A set of four proportionately larger and smaller implants allows a surgeon to choose the appropriately sized prosthesis for implantation in respect of the metacarpal osteotomy.
    Type: Grant
    Filed: January 6, 2004
    Date of Patent: January 5, 2010
    Assignee: Ascension Orthopedics, Inc.
    Inventors: William F. Ogilvie, Charles W. Mumme, Ian A. Trail
  • Publication number: 20090317767
    Abstract: A material comprising: from 98-50% by volume of zirconia as a matrix, which is stabilized with i) either of from about 2 to about 3 mole percent of yttria ii) or of from about 10 to about 15 mole percent of ceria; iii) or a mixture of ceria and yttria in the range of amounts as given in i) and ii) the stabilizing oxides may be substituted against each other in a ratio from 1:99 to 99:1 and a maximum stabilization of 3 mole percent related to pure yttria and 15 mole percent related to pure ceria respectively are not exceeded, and wherein the term mole percent is related to the zirconia matrix and wherein the zirconia matrix is obtainable from a) a powder of particles of zirconia having a mean particle size of <0.
    Type: Application
    Filed: October 5, 2007
    Publication date: December 24, 2009
    Inventors: Wolfgang Burger, Wolfgang Leonhardt, Norbert Thiel, Marc Stephan
  • Publication number: 20080269908
    Abstract: Thumb carpometacarpal (CMC) joint implants include a trapezium implant defining an articulating surface and a cooperating first metacarpal implant with a base portion of the first metacarpal defining an articulating surface. The first metacarpal base articulating-surface is configured to articulate against the trapezium implant articulating surface.
    Type: Application
    Filed: April 25, 2008
    Publication date: October 30, 2008
    Inventor: Mark J. Warburton
  • Publication number: 20080154385
    Abstract: A distal component for an interphalangeal prosthesis suitable for insertion into a proximal end of a distal phalangeal bone includes a stem portion shaped to be received within a surgically prepared bore in the proximal end of the distal bone. A head portion has an under-surface and an upper-surface, the under-surface of which in use will bear on the bone into which the stem is implanted.
    Type: Application
    Filed: June 20, 2007
    Publication date: June 26, 2008
    Applicant: FINSBURY (DEVELOPMENT) LIMITED
    Inventors: Ian Alexander Trail, Roderick John Mathias
  • Publication number: 20080109084
    Abstract: A prosthetic finger includes a crossed four (4) bar linkage system having a base formed by a base bar, two cross bars, and an interface bar that engages an object to be held. The base bar is fixed to an artificial finger of an amputee. A first cross bar has a first end pivotally mounted to a first end of the base bar and a second cross bar has a first end pivotally mounted to a second end of the base bar. The first cross bar has a second end pivotally mounted to a first end of the interface bar and the second cross bar has a second end pivotally mounted to a second end of the interface bar. The first and second cross bars are slideably interconnected to one another at a cross point which changes its location as the prosthesis grasps objects of differing sizes and shapes.
    Type: Application
    Filed: November 1, 2007
    Publication date: May 8, 2008
    Applicant: UNIVERSITY OF SOUTH FLORIDA
    Inventors: Murray E. Maitland, M. Jason Highsmith, Craig Lusk
  • Patent number: 7186362
    Abstract: A prosthetic medical device exhibiting improved wear resistance is fabricated by sealing at least one polyolefinic material in an airtight container and providing an inert atmosphere within the airtight container. The polyolefinic material is exposed to an irradiation source to yield a cross-linked irradiated polyolefinic material. At least one non-irradiated polyolefinic material is blended with the irradiated polyolefinic material, and the prosthetic medical device is formed from the blended material. Selectively cross-linked polymeric compositions may be created by blending a specific amount of cross-linked resins with a specific amount of uncross-linked resins then cured into a polymeric matrix whereby the desired degree or percentage of overall cross-linking is obtained. The polymeric material may then be formed directly into a finished article by injection molding the polymeric material.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: March 6, 2007
    Assignee: Howmedica Osteonics Corp.
    Inventors: Aiguo Wang, Aaron Essner
  • Patent number: 7182787
    Abstract: The implant includes a stem terminating in a head. The stem is adapted to be inserted in the metacarpus of the thumb and the head to be disposed in a space obtained particularly by removing at least a portion of the trapezium. The surface of the head is constituted by a base connected to the stem and adapted to rest on the proximal end of the metacarpus, a distal surface portion opposite the base and serving as a contact surface with the bone located facing the proximal end of the metacarpus, and a connecting portion connecting the base and the distal surface portion of the head. The distal surface portion of the head is inclined relative to a longitudinal axis of the stem by a predetermined angle, such that, when the stem is mounted straight in the metacarpus, the distal surface portion of the head can be located in varus.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: February 27, 2007
    Assignee: Bioprofile
    Inventors: Michel Hassler, Cecile Real, Jean-Pierre Pequignot, Yves Allieu
  • Patent number: 7037342
    Abstract: A spacer member (1) is intended to be placed between the ends of the bones which are to be connected, one end of the spacer member being designed to form a joint surface against one of the bone ends (6,7). A joint-stabilizing connection (2,3) is arranged to connect the bones. The spacer member (1) is made of at least one tissue-compatible material.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: May 2, 2006
    Assignee: Artimplant AB
    Inventors: Anders Nilsson, Bengt Edberg
  • Patent number: 6905511
    Abstract: A prosthetic medical device exhibiting improved wear resistance is fabricated by irradiating at least one polyolefinic material in the presence of an inert atmosphere to yield a cross-linked irradiated polyolefinic material; blending at least one non-irradiated polyolefinic material with the at least one irradiated polyolefinic material, and forming the prosthetic medical device from the blended material. Selectively cross-linked polymeric compositions may be created by blending a specific amount of cross-linked resins with a specific amount of uncross-linked resins then cured into a polymeric matrix whereby the desired degree or percentage of overall cross-linking is obtained. The polymeric material may then be formed directly into a finished article by injection molding the polymeric material.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: June 14, 2005
    Assignee: Howmedica Oseonics Corp.
    Inventors: Aiguo Wang, Aaron Essner
  • Patent number: 6869449
    Abstract: A joint prosthetic component that includes first and second arms, and a joint member interposed therebetween. The joint member is configured to permit flexion motion between the first and second arms, and includes a first concave surface and a second concave surface. The first concave surface has a plurality of arcuate portions defined therein. The first and second concave surfaces are located on opposing sides of the joint member.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: March 22, 2005
    Assignee: DePuy Orthopaedics, Inc.
    Inventors: Robert J. Ball, Bruce Khalili, Arnold-Peter C. Weiss
  • Patent number: 6811568
    Abstract: The present invention provides an artificial joint which can be rapidly, securely and easily fixed while being suited to an inner surface of a bone marrow hole by a novel structure absolutely different from the conventional one. An artificial joint is provided with a stem base portion (10) in which a desired head (2) and a desired socket (5) are in slidably contact with each other in a freely bending manner, stems (9, 16) are fitly attached to free ends of the head (2) and the socket (5) respectively, and the respective stems (9, 16) have therein locking screws (14) freely screwing to move along axial directions thereof, and a pair of stem pieces (15) having an elasticity provided to protrude on both front portions of the stem base portion (10), and the locking screws (14) are forcedly inserted within the stem pieces (15) so as to expand them outward, thereby making them tightly contact with and fix to inner surfaces of bone marrow holes (19, 21).
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: November 2, 2004
    Assignees: Aidall International Ltd., Nakashima Propeller Co., Ltd.
    Inventor: Yoshitaka Minamikawa
  • Publication number: 20040070107
    Abstract: The present invention is a method of making a lubricious polyacrylonitrile artificial joint of a predetermined form and the resulting product. The method includes preparing a solution of a room temperature solvent that will dissolve polyacrylonitrile at room temperature and a room temperature non-solvent that will not dissolve polyacrylonitrile at room temperature. The solution is prepared with sufficient non-solvent to render the room temperature solvent inoperable for polyacrylonitrile at room temperature and operable at temperatures above 65° C. to dissolve polyacrylonitrile therein. Next, the polyacrylonitrile and the solution are combined into a mixture, in an amount of at least 20%, by weight, of polyacrylonitrile. The mixture is then heated at temperatures in excess of 65° C. to produce a fluid polyacrylonitrile product, and processed into an artificial joint component mold. Next, the product is cooled and may be rinsed, solvent extracted and dried. It is then treated chemically, e.g.
    Type: Application
    Filed: October 9, 2002
    Publication date: April 15, 2004
    Applicant: PRAGTECH, INC.
    Inventor: George P. Stoy
  • Patent number: 6699292
    Abstract: First and second elements that have mating heads form an interphalangeal joint prosthesis that allows smooth articulation dorsal to volar. The first element head has a proximal surface defined by two intersecting planes, a stem portion that extends longitudinally therefrom and a convex bicondylar articulating surface having a central valley. The second element has a biconcave articulating proximal surface which mates with the first element articulating surface and a stem portion that extends longitudinally from the distal surface thereof, with a notch being formed in a dorsal surface of the head at a location that does not disturb attachments to the dorsal tubercle or the function of the median band of the extensor expansion. Sets of such joint prostheses of varying sizes are provided which are designed so that adjacent sizes interfit. A method for treating a deteriorated PIP joint is described.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: March 2, 2004
    Assignee: Ascension Orthopedics, Inc.
    Inventors: William F. Ogilvie, Charles W. Mumme, John K. Stanley
  • Publication number: 20030097180
    Abstract: The present invention provides a joint prosthesis system for the joining of two bones. The bioabsorbable joint prosthesis system includes at least one bioabsorbable spacer and at least one connector adapted to be fixedly attached to the two bones, at least a portion of the connector being in contact with the spacer to prevent lateral movement of the spacer. The present invention also includes embodiments drawn to methods of using the joint prosthesis system. In an embodiment of the present invention, the method includes interposing at least one bioabsorbable spacer between the surface of the bones to be joined and connecting the bones with at least one connector such that at least a part of the connector contacts the bioabsorbable spacer.
    Type: Application
    Filed: November 20, 2001
    Publication date: May 22, 2003
    Inventors: Pertti Tormala, Mauri Lehtimaki, Matti Lehto, Minna Kellomaki, Pirjo Honkanen
  • Publication number: 20030069645
    Abstract: A joint prosthetic component that includes first and second arms, and a joint member interposed therebetween. The joint member is configured to permit flexion motion between the first and second arms, and includes a first concave surface and a second concave surface. The first concave surface has a plurality of arcuate portions defined therein. The first and second concave surfaces are located on opposing sides of the joint member.
    Type: Application
    Filed: October 1, 2002
    Publication date: April 10, 2003
    Inventors: Robert J. Ball, Bruce Khalili, Arnold-Peter C. Weiss
  • Patent number: 6475242
    Abstract: An arthroplasty joint assembly for medically and articulately interconnecting first and second opposed end regions of lengthwise adjacent first and second bones. The artificial joint assembly includes a first assembly including external threading extending lengthwise from a generally pointed end of the first assembly for anchoring the first assembly within a cavity of the first bone such that an opposite end of the first assembly extends toward the second bone. The artificial joint assembly also includes a second assembly having external threading extending lengthwise from a generally pointed end of the second assembly for anchoring the second assembly within a cavity in the second bone and such that an opposite end of the second assembly extends toward the first bone.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: November 5, 2002
    Inventor: Dale G. Bramlet
  • Patent number: 6454808
    Abstract: A finger joint prosthesis for MP joint or PIP joint in which a socket has an opening at a portion thereof and a spherical face on an inner side thereof and is integrally formed with a stem on a side opposed to the opening, a head has a spherical portion fit to the spherical face via the opening and is integrally formed with a stem extending outwardly from the opening and a sheath for surrounding the stem of either of the socket and head is provided and the stem is movable slidably in an axial direction by adhering and fixing the sheath to a narrow cavity at a nearly disposed portion or a remotely disposed portion whereby the joint prosthesis is matched with motional characteristic of finger.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: September 24, 2002
    Assignee: M-E-System Inc.
    Inventor: Kazuhiro Masada
  • Patent number: 6436137
    Abstract: Methods and compositions for fabricating prosthetic medical devices exhibiting improved wear resistance include selectively cross-linking polymeric resins then curing and shaping the polymer into a finished article. The selectively cross-linked polymeric compositions may be created by blending a specific amount of cross-linked resins with a specific amount of uncross-linked resins then cured into a polymeric matrix whereby the desired degree or percentage of overall cross-linking is obtained. The polymeric material may then be formed directly into a finished article by injection molding the polymeric material.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: August 20, 2002
    Assignee: Howmedica Osteonics Corp.
    Inventors: Aiguo Wang, Aaron Essner
  • Patent number: 6423097
    Abstract: The invention shows an artificial finger joint comprising a convex joint head and comprising a concave joint shell which can be fastened independently of one another with a respective shaft in a bone end and which can be moved in an articulation plane from an extension position with parallel shaft axes into a hyperextension position or into an articulation end position. A guide pin projects out of the joint shell in the direction of its shaft axis and protrudes into a pocket of the joint head, with the pocket having a first abutment for the guide pin in the hyperextension position. A second abutment between the joint shell and the joint head prevents a tilting of the guide pin and shaft of the joint shell about the first abutment in hyperextension position.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: July 23, 2002
    Assignee: Sulzer Orthopedics Ltd.
    Inventor: Markus Rauscher
  • Publication number: 20020065561
    Abstract: First and second elements that have mating heads form an interphalangeal joint prosthesis that allows smooth articulation dorsal to volar. The first element head has a proximal surface defined by two intersecting planes, a stem portion that extends longitudinally therefrom and a convex bicondylar articulating surface having a central valley. The second element has a biconcave articulating proximal surface which mates with the first element articulating surface and a stem portion that extends longitudinally from the distal surface thereof, with a notch being formed in a dorsal surface of the head at a location that does not disturb attachments to the dorsal tubercle or the function of the median band of the extensor expansion. Sets of such joint prostheses of varying sizes are provided which are designed so that adjacent sizes interfit. A method for treating a deteriorated PIP joint is described.
    Type: Application
    Filed: November 27, 2001
    Publication date: May 30, 2002
    Inventors: William F. Ogilvie, Charles W. Mumme, John K. Stanley
  • Patent number: 6386877
    Abstract: The implant (11) has an anchoring part (15) with an axis (13), a generally cylindrical section and a peripheral surface (21). The latter is provided, in the generally cylindrical section, with protuberances (27) which are distributed around the axis (13). At least the majority of these protuberances are elongate and parallel with the axis (13) and have at least one terminal surface which is contiguous with a recess (23) having a base formed by the peripheral surface (21). In this way, the anchoring part (15) can be pushed into a substantially cylindrical hole (2) in a bone (1) such that the implant (11) is immediately anchored in the bone (1) in a stable manner, said implant nevertheless having a high degree of strength.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: May 14, 2002
    Inventor: Franz Sutter
  • Patent number: 6383223
    Abstract: In an endoprosthesis (11h) for a joint, the two interacting joint parts (15h, 16h) are joined by a cord-type connection piece (21h), which is attached in the vicinity of the body axis (M2h, M2h′) of the convex condyle (15h) and extends through a longitudinal groove (22h) in the flexion direction of the joint. The connection piece assures a play space (31h) between the contact surfaces (19h, h′, 20h, h′) of joint (11h). It is protected from friction on groove wall (55h, 55h′) by an elevation (50h, 43h) in concave joint part (16h). An elevation (43h, 50h) at concave joint part (16h) and a depression (49h) at convex joint part (15h) interact in such a way that the lateral movement play space between depression and elevation determines the freedom of movement with respect to the lateroflexion of the joint.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: May 7, 2002
    Inventors: André Baehler, Beat R. Simmen
  • Patent number: 6352560
    Abstract: The joint prosthesis includes a first part with a cylindrical socket and a second part with a cylindrical head. The cylindrical head and socket are of complementary form, in such a manner that together they are able to form a linear hinge. The cylindrical socket extends over at most 180° in the circumferential direction. The cylindrical head is provided with a radial thickened section which extends in the circumferential direction. The cylindrical socket is provided with a radial recess which extends in the circumferential direction and in which the radial thickened section can be accommodated, with the cylindrical head in bearing contact inside the cylindrical socket. The radial thickened section and radial recess are arranged centrally and are formed so as to be self-aligning with respect to one another.
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: March 5, 2002
    Assignee: Van Straten Beheer B.V.
    Inventors: Paul Henricus Poeschmann, Cornelis Marinus Van Leeuwen
  • Patent number: 6342076
    Abstract: In a prosthetic device for joints for implantation in humans and animals, a joint body is arranged between two fixing elements which are intended to be connected to adjoining bone parts. The joint body includes at least one essentially helical spring, and the ends of each spring are connected to the fixing elements.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: January 29, 2002
    Assignee: Handevelop AB
    Inventor: Göran Lundborg
  • Publication number: 20010025199
    Abstract: The invention shows an artificial finger joint comprising a convex joint head (1) and comprising a concave joint shell (2) which can be fastened independently of one another with a respective shaft (3, 4) in a bone end (5, 6) and which can be moved in an articulation plane from an extension position (7) with parallel shaft axes (8, 9) into a hyperextension position (10) or into an articulation end position (11). A guide pin (12) projects out of the joint shell (2) in the direction of its shaft axis (9) and protrudes into a pocket (13) of the joint head (1), with the pocket (13) having a first abutment (16) for the guide pin (12) in the hyperextension position (10). A second abutment (17) between the joint shell (2) and the joint head prevents a tilting of the guide pin (12) and shaft (4) of the joint shell (2) about the first abutment (16) in the hyperextension position (10).
    Type: Application
    Filed: March 20, 2001
    Publication date: September 27, 2001
    Inventor: Markus Rauscher