Femoral Joint Head Cap Patents (Class 623/23.12)
  • Patent number: 10492926
    Abstract: The disclosure herein provides methods, systems, and devices for assisting alignment of humeral or femoral stems during replacement surgery. In one illustrative embodiment, a slotted disk is configured to position a prosthetic stem into a canal in the humerus when the stem is driven through the slot. In another illustrative embodiment, a similar slotted disk structure is configured to position a prosthetic stem into a canal in the femur.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: December 3, 2019
    Assignee: Shoulder Innovations, Inc.
    Inventor: Stephen B. Gunther
  • Patent number: 10426635
    Abstract: A medical force measuring system is provided for measuring a force effective between two prosthesis parts that are connected to one another in articulated manner in a joint prosthesis which includes a ball joint or a partial component thereof. The force measuring system includes a measuring instrument which has a sample joint element with a sample joint surface. The sample joint element is formed in correspondence with a first joint element that forms a part of the ball joint and has a joint surface which is formed in correspondence with the sample joint surface and is moveable into engagement therewith for forming a sample ball joint. The measuring instrument also includes at least one of a measuring device and an indicating device which cooperates with the sample joint element for measuring and/or indicating a force (or a partial component thereof) effective on the sample joint surface.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: October 1, 2019
    Assignee: Aesculap AG
    Inventors: Uwe Bader, Mevluet Sungu
  • Patent number: 10350075
    Abstract: A coupling device is for connecting prosthesis components by a self-locking press fit on an end, formed as a cone, of a first prosthesis component that is inserted in bone tissue. The coupling device has an outer coupling body with a socket having a conically tapering inner wall, and an expansion sleeve having a lateral surface forming a male taper and an operative surface forming a female taper. The expansion sleeve is mounted in the socket so as to be rotatable about the longitudinal axis thereof, and receives the cone. The expansion sleeve is expandable radially outwardly to form the self-locking press fit, such that the expansion sleeve widens radially when the cone is inserted into the expansion sleeve. As a result, the self-locking press fit between the cone of the first prosthesis component and the coupling device is established.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 16, 2019
    Assignee: Aristotech Holding GmbH
    Inventor: Emmanuel Anapliotis
  • Patent number: 10258473
    Abstract: An intra-articular device comprises a membrane shaped like a cap having a peripheral geometry similar to that of a head of a bone for a joint to be restored and an open end sized to be applied over the bone proximate the head, so that the open end can be stretched over the head of the bone and held in position on the bone interposed between the head and its corresponding articular component of the joint. The membrane is made of a polyether-urethane-urea material selected to have a property of absorbing the joint's own synovial fluid so as to swell and have a viscoelastic property similar to the body's own articular hyaline cartilage. In a preferred embodiment, the membrane cap is adapted for use on a femoral bone for restoring a hip joint.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: April 16, 2019
    Assignee: SoftJoint Corporation
    Inventor: John T. Frauens
  • Patent number: 9974657
    Abstract: A femoral head resurfacing implant is described comprising an external articulating surface and an internal fixation surface. A stem projects from the center of the internal fixation surface. The internal fixation surface comprises a top surface, surrounding and substantially orthogonal to a long axis of the stem, a chamfer surface extending downwardly and outwardly from the top surface and a side surface extending substantially parallel to the long axis of the stem. At least one projection is arranged on the internal fixation surface to provide a predetermined gap between the top surface and/or chamfer surface and a resected head onto which the implant is to be fitted. Furthermore, the side surface constitutes or comprises a cement containment feature configured to restrict or eliminate outflow of cement from the predetermined gap.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: May 22, 2018
    Inventor: Derek James Wallace McMinn
  • Patent number: 9968458
    Abstract: The present invention relates to a medical implant for reducing pain in diseased joints such as synovial joints, in particular ball and socket joints such as the hip joint and the shoulder joint. One embodiment relates to a medical implant for attachment to and at least partly covering the femoral head, said medical implant comprising a dome shaped shell with an orifice, said shell having a height h1, an equatorial shell radius rs and an orifice radius ro wherein the shell radius rs>ro, and h1>rs, and the orifice is defined by a circumferential rounded edge.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: May 15, 2018
    Assignee: Bispebjerg Hospital
    Inventors: Jes Bruun Lauritzen, Sune Lund Sporring
  • Patent number: 9770336
    Abstract: A locking member for implantation in a hip joint of a patient is provided. The hip joint has a caput femur integrated with a collum femur having a center axis extending longitudinal along the collum and caput femur in the center thereof. The locking member is adapted to assist in the fixation of a medical device, having an artificial hollow caput femur surface, to the collum and/or caput femur, wherein said artificial caput femur surface comprises at least one extending portion adapted to clasp a portion of the caput and/or collum femur, and wherein said locking member comprises an element adapted to lock said artificial caput femur surface such that the caput femur remains clasped and restrained in said artificial caput femur surface.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: September 26, 2017
    Inventor: Peter Forsell
  • Patent number: 9351836
    Abstract: A locking implant is provided for a long bone. The locking implant comprises a head portion, a stem portion extending from the head portion, and an anchor disposed at an end of the stem portion for engagement within a resected long bone. The anchor defines at least one locking feature, such as a cam, configured to engage an interior of the resected long bone upon rotation of the implant, thereby locking the head portion to the long bone. The implant may comprise a two component modular design. Methods of locking the implant to a long bone structure are also provided.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: May 31, 2016
    Assignee: Biomet Manufacturing, LLC
    Inventors: John M. McDaniel, Nathan A. Winslow
  • Patent number: 9351840
    Abstract: A medical device for treating hip joint osteoarthritis in a human patient is provided, the hip joint comprises an acetabulum, being a part of the pelvic bone, and a caput femur, being connected to the collum femur and being the upper extremity of the femoral bone. The caput femur and collum femur further comprises cortical bone, the outer more sclerotic bone, and cancellous bone, placed in the bone marrow, said medical device comprising: an artificial caput femur surface, adapted to be in contact with the acetabulum surface or an artificial replacement therefor, and a fixating member adapted to at least partly be stabilized by the cortical bone of a stabilizing part of the collum femur.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 31, 2016
    Inventor: Peter Forsell
  • Patent number: 8992623
    Abstract: The present disclosure relates to a stemless shoulder prosthesis comprising a fixation device for fixing the prosthesis to a resected humerus bone, the fixation device comprising a base portion (11, 31, 32) and anchoring means (12, 12?), the base portion (11, 31, 32) having a distal side adapted to contact a resection plane of the bone and a proximal side for carrying a humeral head. The anchoring means (12, 12?) are connected to the distal side of the base portion (11, 31, 32) and adapted to fix the prosthesis to the bone. The anchoring means (12, 12?) define a central axis (C), wherein the anchoring means (12, 12?) comprise a plurality of protrusions (13, 13?, 13a, 13b, 13c) projecting from the base portion (11, 31, 32), each protrusion (13, 13?, 13a, 13b, 13c) extending between an inner end (I) and an outer end (O). The protrusions (13, 13?, 13a, 13b, 13c) define a free central space (F) around the central axis (C).
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: March 31, 2015
    Assignee: Zimmer GmbH
    Inventors: Andrew Hopkins, Levent Kusogullari
  • Patent number: 8979935
    Abstract: Joint space interpositional prosthetic devices for positioning between surfaces of a joint in a patient are disclosed. The prosthetic device may have exterior surfaces affixed to the joint surfaces and may have internal surfaces which provide bearing surfaces. In an exemplary embodiment, the bearing surfaces are encapsulated within the device. The exterior surfaces of the device may include bone securement features to facilitate attachment of the prosthetic device to the joint surfaces.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: March 17, 2015
    Assignee: Zimmer, Inc.
    Inventors: Antony J. Lozier, Russell M. Parrott, David B. Rich
  • Publication number: 20140371868
    Abstract: A modular hip joint prosthesis system has an intermediate element which has an inner surface for receiving a prosthesis neck and an outer surface, a joint ball head which is embodied as a plug head having an inner surface associated with the outer surface of the intermediate element, and a bipolar joint socket in which an inlay is received in an outer shell in a freely moving manner and which has a ball receiver which is associated with the joint ball head, configured such that the joint ball head can be received in a movable manner. A premounted joint prosthesis system part for a modular joint prosthesis system and a sterile article are also provided.
    Type: Application
    Filed: June 26, 2014
    Publication date: December 18, 2014
    Applicant: Merete Medical GmbH
    Inventor: Emmanuel Anapliotis
  • Publication number: 20140316531
    Abstract: A scalable modular hip resurfacing arthroplasty system includes (1) an alignment guide for precise guide pin insertion, (2) a modular cannulated cylindrical reamer assembly for accurate femoral head cylindrical reaming and central bone channel drilling, (3) a saw guide for an accurate femoral head osteotomy, (4) a soft tissue protector with a stepped design to shield and retract tissues, (5) a hip retractor that seats onto a prepared femur, (6) an outer hole drill guide aiding drilling of peripheral holes, and (7) a femoral resurfacing implant with a cap portion and central stem adapted for multiple modular attachments including plates. A method for preparing the proximal femur for hip resurfacing with novel stepped cylindrical femoral head osteotomy and central bone channel drilling, leaving an intact collar of cortical bone above the femoral head articular rim.
    Type: Application
    Filed: March 24, 2014
    Publication date: October 23, 2014
    Applicant: RevOrtho LLC
    Inventors: Craig Eric Klinger, Jose Bernardo Toro Arbelaez
  • Patent number: 8834470
    Abstract: A bone repairing kit including a drilling device, a pushing device, a clamping member and a hole saw. An end of a tube body of the drilling device is a knife portion. When the tube body rotates with respect to a femur, a bone column is cut by the knife portion and located in the tube body. The pushing device includes a hollow tube and a push bar. The hollow tube is for receiving the tube body. The push bar is for touching and pushing the bone column in the tube body. The clamping member is for clamping the bone column. The hole saw includes a receiving body and cutting knives. The receiving body has a recess for receiving an end of the bone column. The cutting knives surrounding on an inner wall of the recess are for cutting an edge of the end of the bone column.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: September 16, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Jen Liao, Ching-Chuan Jiang, Sung-Ching Chen, Pei-Chi Hsu, Shih-Jui Han
  • Patent number: 8808391
    Abstract: A femoral implant for fitting to a resected femur comprises a section having a frustoconical external form, a stem part extending away from the section to a distal end of the implant, and a femoral head extending directly away from the section to the proximal end of the implant. The implant could have the femoral head integral with the section, or as a separate component secured thereto, with the stem being a separate one piece component incorporating the section.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: August 19, 2014
    Assignee: T.J. Smith & Nephew, Limited
    Inventor: Derek James Wallace Mcminn
  • Patent number: 8801799
    Abstract: An implant is provided for replacing the proximal portion of a femur having a substantially intact natural femoral neck and a lateral side opposite the femoral neck, with a bore extending from the femoral neck through a lateral side of the femur. The implant comprises a sleeve having a flange for engaging a proximally facing resected surface of the neck surrounding the bore in the femur and having a bore with an inwardly tapered conical portion. A shaft member having a longitudinal axis, a distal end, and a proximal end is placed in the bore through the femur. The shaft member has an intermediate conically tapered male portion for coupling to the conically tapered bore of the sleeve and a proximal end having a conically tapered portion. A head member having a distal end and a proximal substantially-spherical portion and a tapered recess is configured for positioning in a natural or prosthetic hip socket.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: August 12, 2014
    Assignee: Howmedica Osteonics Corp.
    Inventors: Theodore Crofford, Michael Santarella
  • Publication number: 20140222158
    Abstract: A prosthetic head for a femoral component has a metal shell with a tapered cavity. The shell has a part-spherical outer surface defining an inner portion terminating in an open end. A polymeric material completely fills the inner portion of the hollow shell extending from an inner surface of the shell to the open end. The polymeric material includes a conically tapered socket centered about the polar axis intermediate ends of the open end wherein the shell is a hollow titanium shell having an inner surface with a porous structure for receiving a portion of the polymeric material. The hollow titanium shell inner surface has at least one rib extending inwardly toward the conically tapered socket.
    Type: Application
    Filed: February 6, 2013
    Publication date: August 7, 2014
    Applicant: HOWMEDICA OSTEONICS CORP.
    Inventors: Daniel E. Lawrynowicz, Haitong Zeng, Zongtao Zhang, Aiguo Wang, Keenan Michael Hanson
  • Patent number: 8696586
    Abstract: A method and device for measuring blood flow in the bone after a fracture, wherein a hole is drilled into the bone. The method includes the steps of inserting the metal sleeve of an osteoscope into the hole; inserting the optics of an osteoscope into the metal sleeve and focused on the cavity created by the drill; filling the device and the cavity with a physiological solution such that the pressure of the solution is above the systolic blood pressure; decreasing the pressure of the solution while observing the cavity through the osteoscope, and recording the pressure in the system at the commencement of bleeding.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: April 15, 2014
    Inventor: Jozsef Nyarady
  • Patent number: 8690958
    Abstract: A humeral head resurfacing implant (11) that has a modulus of elasticity close to that of human cortical bone as a result of its design from an integral substrate of isotropic graphite covered completely with a reinforcing layer of dense isotropic pyrolytic carbon. A carefully engineered cruciform stem (15) extends from the axial center of a flat distal circular surface (23) of a spherical cap portion (19) of the implant head located within the confines of a surrounding skirt portion (21).
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: April 8, 2014
    Assignee: Ascension Orthopedics, Inc.
    Inventors: Jerome J. Klawitter, Robert B. More, Monti R. Gourley, Joseph P. Ritz, Evgeny G. Podnos
  • Patent number: 8632602
    Abstract: An implant meant for hip resurfacing arthroplasty, a surgical reconstruction performed on patients with diseased hips, during which the surgeon replaces the surface of the femoral head with a polished metallic hemispherical shell is disclosed. The implant includes a metallic shell with a polished hemispherical outer surface and an inner hemispherical concave surface, from which extends a trunnion having internal threads and thin meridian fins. The inner concave surface of the implant is fully metal porous coated for osseointegration between implant and bone. The presented implant is fitted onto the appropriately contoured femoral head and is stabilized by means of a preload tension wire which drills the femoral head and neck and exits the greater trochanter. The wire attaches proximally to the thread of the trunnion of the shell and distally to a nut-washer combination, by the tightening of which establishment of preload is achieved.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: January 21, 2014
    Inventor: Ioannis Vlachos
  • Patent number: 8603092
    Abstract: A bone repairing kit including a drilling device, a pushing device, a clamping member and a hole saw is provided. An end of a tube body of the drilling device is a knife portion. When the tube body rotates with respect to a femur, a bone column is cut by the knife portion and located in the tube body. The pushing device includes a hollow tube and a push bar. The hollow tube is for receiving the tube body. The push bar is for touching and pushing the bone column in the tube body. The clamping member is for clamping the bone column. The hole saw includes a receiving body and cutting knives. The receiving body has a recess for receiving an end of the bone column. The cutting knives surrounding on an inner wall of the recess are for cutting an edge of the end of the bone column.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: December 10, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Jen Liao, Ching-Chuan Jiang, Sung-Ching Chen, Pei-Chi Hsu, Shih-Jui Han
  • Patent number: 8439978
    Abstract: A substantially cup-shaped prosthetic device for a joint is provided. The prosthetic device includes an outer surface configured to operatively engage at least one of a first bone of the joint and a component, an inner surface including at least a portion configured to connect to a second bone of the joint, and at least one reservoir having an opening at each of the inner surface and the outer surface and extending therebetween.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: May 14, 2013
    Assignee: Mako Surgical Corp.
    Inventor: Peter Ebbitt
  • Patent number: 8394149
    Abstract: The invention relates to a cap-shaped implant for implanting on a prepared stump of a femoral head. The implant is in the form of a ball section, having a flat base surface and a polar axis which is arranged in a perpendicular in relation to the base surface. According to the invention, a cavity is arranged in ball section which protrudes from the base surface, said cavity is rotationally symmetrical and comprises a hollow spatial axis which is arranged below an angle (a) which is different form zero in relation to the polar axis.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: March 12, 2013
    Assignee: Zimmer, GmbH
    Inventors: Ralph Howald, Peter Heuberger, Daniel Hertig, Job-Jan Greeve
  • Publication number: 20130060346
    Abstract: A hip prosthesis system (10) comprises a hip-resurfacing femoral component (12) for use with a prepared natural femoral neck, a total-hip-replacement femoral component (14) for insertion into the femur following removal of the natural head and at least in part neck and which is different to the hip-resurfacing femoral component (12), and a common femoral cap (16) which defines a part-spherical articulating surface (82) for engagement with an acetabular cup and which is selectively engagably mountable on the hip-resurfacing femoral component (12) and the total-hip-replacement femoral component (14). A method of intra-operably selecting between a hip resurfacing procedure and a total hip replacement procedure using such a system (10) is also provided.
    Type: Application
    Filed: January 19, 2011
    Publication date: March 7, 2013
    Applicant: CORIN LIMITED
    Inventor: Simon Collins
  • Patent number: 8361163
    Abstract: A substantially cup-shaped prosthetic device for a joint is provided. The prosthetic device includes an outer surface configured to operatively engage at least one of a first bone of the joint and a component and an inner surface configured to connect to a second bone of the joint. The inner surface is rotationally asymmetric to minimize intrusion on a vascular region of the second bone.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: January 29, 2013
    Assignee: Mako Surgical Corp.
    Inventor: Arthur E. Quaid
  • Patent number: 8273133
    Abstract: Systems and methods for providing deeper knee flexion capabilities, more physiologic load bearing and improved patellar tracking for knee prosthesis patients. Such systems and methods include (i) adding more articular surface to the antero-proximal posterior condyles of a femoral component, including methods to achieve that result, (ii) modifications to the internal geometry of the femoral component and the associated femoral bone cuts with methods of implantation, (iii) asymmetrical tibial components that have an unique articular surface that allows for deeper knee flexion than has previously been available and (iv) asymmetrical femoral condyles that result in more physiologic loading of the joint and improved patellar tracking.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: September 25, 2012
    Inventor: Kent M. Samuelson
  • Patent number: 8211185
    Abstract: An artificial joint implant in use with a bone and including a three dimensional shaped body have an exterior configured and joint defining face. An annular shaped recess is formed within a seating location of the implant for securing the body over a sectioned end of the bone. A stem extends from the body inwardly within the bone and exhibits at least one support for engaging an inner bone surface and in order to maintain the implant in secured fashion to the bone.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: July 3, 2012
    Assignee: Linares Medical Devices, LLC
    Inventor: Miguel A. Linares
  • Publication number: 20120150314
    Abstract: A medical device for implantation in a hip joint of a patient is provided. The medical device is adapted to be fixated to the pelvic bone of the patient. The medical device comprises an inner and an outer surface, a contacting portion of the inner surface is spherical and adapted to face the center of the hip joint when said medical device is implanted, and said medical device is adapted to receive a caput femur or a prosthetic caput femur having a spherical portion. The medical device comprises at least one extending portion adapted to clasp the caput femur, or prosthetic caput femur, for restraining said caput femur, or prosthetic caput femur in said medical device. The medical device is adapted to release the caput femur or prosthetic caput femur from the medical device when a predetermined strain is placed on the medical device.
    Type: Application
    Filed: July 12, 2010
    Publication date: June 14, 2012
    Inventor: Peter Forsell
  • Patent number: 8157870
    Abstract: A prosthesis for replacing a surface in an area of a ball of a ball-and-socket joint includes a spherical shell section having an outer surface that is configured to lie in an articular fossa and is for attachment to a surface. The shell section having a cavity for receiving a bone end. The prosthesis also includes a crown that partitions the cavity of the shell section into a first cavity and a second cavity, wherein a shape of the shell section is at least a section of a hemisphere and a free edge of the crown lies in the same plane as a free edge of the shell section.
    Type: Grant
    Filed: February 21, 2005
    Date of Patent: April 17, 2012
    Assignee: Synthes USA, LLC
    Inventors: Philipp Kropf, Ralph Hertel
  • Patent number: 8152855
    Abstract: Tools and methods for implanting hip resurfacing femoral prostheses along a path defined by the axis of a shaped femoral head surface are described. The prostheses are stemless partial ball components having an outer surface shaped to conform to an acetabular socket and may be a two part design having a mating sleeve component with an internal bore adapted to receive the shaped femoral head. The tools and methods are capable of accurately implanting both one and two piece ball components and sleeves without requiring the prosthesis to have a central stem or the preparation of a stem cavity in the femoral head and neck.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: April 10, 2012
    Assignee: Howmedica Osteonics Corp.
    Inventors: Peter Tulkis, Robert E. Ledger, Patrick Raugel
  • Patent number: 8097040
    Abstract: The present invention relates to an improved osteosynthesis modular prosthesis, particularly for humerus osteosynthesis, characterize in that it comprises a cup element (7) having a convex surface suitable to be introduced within a bone cavity, particularly within the humerus glenoid cavity, and having a concave surface suitable to contain and keep joined all the bone fragments, particularly fragments of humerus epiphysial pa (2, 3, 4), permitting vascularization and the consequent recovery of bone tissue, a stem element suitable to be introduced within a diaphyseal channel, particularly within humerus diaphyseal channel, a coupling element (9), and coupling means (10, 11) suitable to fix ends of said coupling element (9) respectively at said cup element (7) and at said stem element (8).
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: January 17, 2012
    Assignee: Arthrex, Inc.
    Inventors: Enrico Russo, Raffaele Russo
  • Patent number: 7931691
    Abstract: A external femoral component for mechanically housing onto exterior remnant of natural femur and coupling with articulation elements in order to use in total hip arthroplasty defines as a hollow shell comprised of asymmetrically bell shaped cup, at least one rigid elongated stem downwardly extended from the lower rim of the cup and a plurality of an cylindrical object upwardly protruded from top of the cup for pairing with articulation elements and coupling with anchoring means and the tension anchoring means fixes the hollow shell on the bone surface through an interlocking mechanisms.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: April 26, 2011
    Inventors: Xue Li, Ping Xie, Kerry Y Xie
  • Publication number: 20110054631
    Abstract: The invention relates to a cartilage resurfacing implant for replacing all or some of the articular cartilage, characterised in that it is made of a biocompatible material (1) of which the modulus of elasticity is between 20 and 25 GPa, said implant matching the shape of the articular bone end on which it is arranged and comprising at least one aperture (2) enabling at least one plug (3) to be arranged and fixed in place. The invention also relates to a cartilage resurfacing kit comprising at least one implant and at least one plug (3) for treating cartilage lesions.
    Type: Application
    Filed: March 21, 2009
    Publication date: March 3, 2011
    Inventors: Yves-Alain Ratron, Michel Hassler
  • Publication number: 20100312353
    Abstract: The invention relates to a cap-shaped implant for implanting on a prepared stump of a femoral head. The implant is in the form of a ball section, having a flat base surface and a polar axis which is arranged in a perpendicular in relation to the base surface. According to the invention, a cavity is arranged in ball section which protrudes from the base surface, said cavity is rotationally symmetrical and comprises a hollow spatial axis which is arranged below an angle (a) which is different form zero in relation to the polar axis.
    Type: Application
    Filed: August 18, 2010
    Publication date: December 9, 2010
    Applicant: ZIMMER, GMBH
    Inventors: Ralph HOWALD, Peter HEUBERGER, Daniel HERTIG, Job-Jan GREEVE
  • Publication number: 20100305713
    Abstract: A set for producing an offset resurfacing condyle cap implant for an artificial hip joint is described. The set has a thin-walled metallic cap (1), to be placed onto the hip joint head that has been milled into shape only in polar area (P) and otherwise has been only decartilaged or freshened, with the walls of the metallic cap being steadily enlarged in the cross-sectional view from of 2 mm to 6 mm in thickness in the area of base edge (2), such that an eccentricity results in its external shape and its interior space (I) has first an essentially cylindrical equatorial area (Z) followed in aforementioned polar area (P) by a truncated cone-shaped, conically narrowing area, with several bore holes (4) in its walls, the axes of which run parallel to main axis (H) of cap (1), and at least one peg (5) for centering and load-bearing insertion into bore holes (4) in cap (1).
    Type: Application
    Filed: August 22, 2008
    Publication date: December 2, 2010
    Applicant: ESKA IMPLANTS AG
    Inventor: Hans Grundei
  • Patent number: 7799087
    Abstract: The invention relates to a cap-shaped implant for implanting on a prepared stump of a femoral head. The implant is in the form of a ball section (11), having a flat base surface (13) and a polar axis (15) which is arranged in a perpendicular in relation to the base surface (13). According to the invention, a cavity (17) is arranged in ball section (11) which protrudes from the base surface (13), said cavity (17) is rotationally symmetrical and comprises a hollow spatial axis (19) which is arranged below an angle (a) which is different form zero in relation to the polar axis (15).
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: September 21, 2010
    Assignee: Zimmer GmbH
    Inventors: Ralph Howald, Peter Heuberger, Daniel Hertig, Job-Jan Greeve
  • Patent number: 7771485
    Abstract: A ball joint or cap for an artificial hip joint is described that is suitable for carrying out a rotating or pivoting motion in an artificial hip joint socket, with a gap being provided for a natural fluid film (synovial fluid) between itself and the artificial hip joint socket, and with regular depressions without interconnecting channels between them being recessed in areas of its surface. It is proposed that its surface in the polar area is smooth and without depressions, that an area is provided in an intermediate area between the smooth polar area and its equator, in which depressions are recessed with hole widths between 1.0 mm to 3.0 mm, that adjacently in the intermediate area in the direction of its base edge, further depressions are recessed, the hole widths of which become steadily smaller, the closer they lie to the base edge, with hole widths between 0.5 mm and 1.0 mm.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: August 10, 2010
    Assignee: ESKA Implants GmbH & Co., KG
    Inventor: Hans Grundei
  • Publication number: 20100168866
    Abstract: A femoral head prosthesis assembly and operation instruments thereof. The operation instruments include a hollow femoral neck holder with a configuration adapted to the surface configuration of the femoral neck and a shaper blade for cutting a replacement end of the femur into a predetermined configuration. A guide tube is disposed on a top face of the femoral neck holder. A transverse slot is formed on the femoral neck holder for indicating a femoral head cutting line. The femoral head prosthesis assembly includes a cap body and an artificial femoral head. A root section of the cap body has an inner surface in conformity to the surface of the femoral neck. A top section of the cap body has a cross section adapted to that of the replacement end. The cap body can be precisely securely bonded with the replacement end of the femur.
    Type: Application
    Filed: July 16, 2009
    Publication date: July 1, 2010
    Inventor: Grant Lu-Sun Shih
  • Publication number: 20100145466
    Abstract: A prosthetic joint assembly that includes a shell including an inner surface. The assembly also includes a bearing member including an outer surface. The bearing member is received by the shell such that the outer surface of the bearing member is adjacent the inner surface of the shell. Furthermore, the joint assembly includes a compressible member that is rigidly fixed to the inner surface of the shell or the outer surface of the bearing member to only cover a portion thereof. The compressible member is made of a material that is different from the shell or the bearing member.
    Type: Application
    Filed: December 8, 2008
    Publication date: June 10, 2010
    Applicant: Biomet Manufacturing Corp.
    Inventor: W. Jason Slone
  • Publication number: 20100121458
    Abstract: A hip resurfacing femoral prosthesis has a partial ball component having an outer surface shaped to conform to an acetabular socket and has a mating sleeve component with an internal bore adapted to receive a femoral head. The head has been shaped and dimensioned to engage the bore and is retained by bone ingrowth, an interference fit or by bone cement. The ball component and sleeve axes may be offset to reposition the outer surface.
    Type: Application
    Filed: November 18, 2009
    Publication date: May 13, 2010
    Applicant: HOWMEDICA OSTEONICS CORP.
    Inventors: Robert E. Ledger, Peter Tulkis, Aiguo Wang, Damon Servidio
  • Publication number: 20100076570
    Abstract: The present invention provides an implant (1) comprising a hollow body (2) having an opening (8), the body (2) having an inner (3) and an outer (4) surface, wherein the inner surface (3) of the body (2) has a surface structure (9) that enables bone in-growth. The present invention also provides a method of implantation, comprising: preparing a resected bone with an optional cavity in the bone canal; providing such an implant (1); and implanting the implant.
    Type: Application
    Filed: September 24, 2007
    Publication date: March 25, 2010
    Inventors: Tim Band, Derek McMinn
  • Publication number: 20100049329
    Abstract: A coxo-femoral surface prosthesis for veterinary use is described. The prosthesis comprises a femoral cap and an acetabular cup which are complementary in volume, an intermediate lining and a screw fixing femoral stem. The femoral stem comprises a head portion, a shank portion and a threaded portion. (FIG.
    Type: Application
    Filed: July 23, 2009
    Publication date: February 25, 2010
    Inventor: Alessandro Vio
  • Publication number: 20100010638
    Abstract: An implant having a porous tissue ingrowth structure and a bearing support structure is disclosed. The implant includes a metal insert having a bone ingrowth structure, an intermediate structure and a bearing support structure. A bearing surface is formed from a polymer material and attached to the bearing support structure. The intermediate structure has a porosity sufficient to inhibit the polymer material from translating through the bearing support structure to the bone ingrowth structure.
    Type: Application
    Filed: September 18, 2009
    Publication date: January 14, 2010
    Applicant: HOWMEDICA OSTEONICS CORP.
    Inventors: Eric Jones, Christopher J. Sutcliffe, Robin Stamp
  • Patent number: 7628820
    Abstract: A set is provided for creating an offset-resurfacing hip-joint implant. The set includes a 1 to 1.5 mm thick metallic acetabulum shell (1) for insertion into the natural acetabulum, from which only cartilage has been removed, a metallic head cap (2) for placement on the natural hip-joint head, from which only cartilage has been removed, and an inlay (3) for insertion into the acetabulum shell (1) as a sliding partner for the head cap (2). The inlay has a material thickness of 2 to 5 mm. The head cap (2) has a wall thickness which increases constantly from a thickness of 2 mm to 6 mm viewed in cross section in the region of the base edge (6) of the head cap, so that an eccentricity is produced in its outer shape.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: December 8, 2009
    Assignee: ESKA Implants GmbH & Co. KG
    Inventors: Hans Grundei, Ludger Gerdesmeyer
  • Publication number: 20090177287
    Abstract: An endoprosthesis for orthopaedic applications comprising a prosthesis body suitable for interfacing between a first and a second bone at a first and a second wall respectively. The prosthesis body, at least one of said walls, comprises a fixing interface suitable for favouring the osteo-integration with an associable bone, which is spaced from one of the walls of the prosthesis body by a plurality of spacer elements for forming a meatus between the interface and the wall, said meatus determining cavities and undercuts suitable for seating growing bony tissue. The fixing interface comprises a reticular structure having a plurality of meshes integrally interconnected to each other and suitable for favouring the osteo-integration.
    Type: Application
    Filed: March 31, 2006
    Publication date: July 9, 2009
    Applicant: SINTEA BIOTECH S.P.A.
    Inventors: Giuseppe Sala, Paolo Guerra
  • Publication number: 20090112330
    Abstract: A ball joint or cap for an artificial hip joint is described that is suitable for carrying out a rotating or pivoting motion in an artificial hip joint socket, with a gap being provided for a natural fluid film (synovial fluid) between itself and the artificial hip joint socket, and with regular depressions without interconnecting channels between them being recessed in areas of its surface. It is proposed that its surface in the polar area is smooth and without depressions, that an area is provided in an intermediate area between the smooth polar area and its equator, in which depressions are recessed with hole widths between 1.0 mm to 3.0 mm, that adjacently in the intermediate area in the direction of its base edge, further depressions are recessed, the hole widths of which become steadily smaller, the closer they lie to the base edge, with hole widths between 0.5 mm and 1.0 mm.
    Type: Application
    Filed: March 20, 2008
    Publication date: April 30, 2009
    Applicant: ESKA Implants GmbH & Co. KG
    Inventor: Hans Grundei
  • Publication number: 20090088860
    Abstract: An orthopaedic prosthesis includes a tibial bearing, a femoral component, and a hinge post coupled to the tibial bearing and the femoral component. The hinge post includes a medial and lateral axle. A pair of bushings are coupled to the axles and received in an internal chamber of the femoral component. The prosthesis may also include a plug received in the internal chamber and positioned to secure the hinge post to the femoral component. The femoral component is configured to rotate about an axis defined by the axles. In some embodiments, the femoral component may include a housing and a patella bearing separate from the housing.
    Type: Application
    Filed: September 30, 2007
    Publication date: April 2, 2009
    Inventors: Kristen L. Romeis, Matthew D. Smith, Allan Ritchie
  • Publication number: 20090062925
    Abstract: Systems and methods for providing deeper knee flexion capabilities, more physiologic load bearing and improved patellar tracking for knee prosthesis patients. Such systems and methods include (i) adding more articular surface to the antero-proximal posterior condyles of a femoral component, including methods to achieve that result, (ii) modifications to the internal geometry of the femoral component and the associated femoral bone cuts with methods of implantation, (iii) asymmetrical tibial components that have an unique articular surface that allows for deeper knee flexion than has previously been available and (iv) asymmetrical femoral condyles that result in more physiologic loading of the joint and improved patellar tracking.
    Type: Application
    Filed: August 25, 2008
    Publication date: March 5, 2009
    Inventor: Kent M. Samuelson
  • Publication number: 20090048681
    Abstract: The presented invention is an implant meant for hip resurfacing arthroplasty, a surgical reconstruction performed on patients with diseased hips, during which the surgeon replaces the surface of the femoral head with a polished metallic spherical shell. The presented implant consists of a metallic shell (1) with a polished hemispherical outer surface and an inner hemispherical concave surface, which possesses a trunnion (2) with a thread (4) and thin meridian fins (3) and is fully metal porous coated for osseointegration between implant and bone. The presented implant is fitted onto the appropriately contoured femoral head and is stabilized by means of a preload tension wire (5), which drills the femoral head and neck and exits the greater trochanter. The wire attaches proximally to the thread (4) of the trunnion (2) of the shell and distally to a nut-washer combination (6), by the tightening of which establishment of preload is achieved.
    Type: Application
    Filed: December 5, 2006
    Publication date: February 19, 2009
    Inventor: Ioannis Vlachos
  • Publication number: 20090043397
    Abstract: Disclosed therein is a big femoral head and femoral head surface replacement, which are used for hip osteoarthritis and vascular necrosis of femoral head. As a person get older and aged, the weight bearing hip joint is indispensably changed to osteoarthritis and sometimes showed avascular necrosis of the femoral head with unknown etiology. The deformed femoral head and hip joint should be replaced with the THA. Till now, the total hip replacement is performed in such a way that the necrosed femoral head and a healthy femoral neck are all removed and a femoral stem is inserted into the marrow cavity, and in this case, a small femoral head causes a reduction of a range of motion and dislocation of the hip joint occasionally, and osteolysis due to abrasion of plastic acetabular liner. In case of a conventional femoral head surface replacement (hereinafter, called “conventional FHSR”), a complication of femoral neck fracture and could not combined use with conventional THA.
    Type: Application
    Filed: August 10, 2007
    Publication date: February 12, 2009
    Inventor: Hyung-bae Park