Stem Includes Protruding Means Projecting Into A Bore In Joint Head Patents (Class 623/22.43)
  • Patent number: 10322003
    Abstract: An orthopedic prosthetic hip assembly and method for use during performance of a hip replacement procedure. The assembly includes a femoral stem component having a tapered trunnion and a femoral head component having a tapered bore. Upon insertion of the tapered trunnion into the tapered bore, a taper lock is formed and a seal provides a fluid-tight closure.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: June 18, 2019
    Assignee: DEPUY IRELAND UNLIMITED COMPANY
    Inventors: Justin D. Grostefon, Jeffrey A. McAnelly
  • Patent number: 9737407
    Abstract: The invention relates to a prosthesis comprising a first component (10) and a second component (60), wherein the first and second components have respective inter-engaging parts (24,64) and wherein at least one of the first or second components comprises an anti-rotational element (32,66) configured to resist rotational movement between the inter-engaging parts and wherein the inter-engaging parts share an axis of rotation such that they are engageable in a plurality of relatively rotated positions and wherein the axis of rotation of the inter-engaging part of one of the first or second components is parallel to but offset from a central axis of said first or second component.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: August 22, 2017
    Inventor: Derek James Wallace McMinn
  • Patent number: 9724201
    Abstract: An othopaedic prosthetic hip assembly for use during performance of a hip replacement procedure includes a femoral stem component having a tapered trunnion and a femoral head component having a tapered bore. Upon insertion of the tapered trunnion into the tapered bore, a taper lock is formed and a seal provides a fluid-tight closure.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: August 8, 2017
    Assignee: DEPUY IRELAND UNLIMITED COMPANY
    Inventors: Justin D. Grostefon, Jeffrey A. McAnelly
  • Patent number: 9649196
    Abstract: A shock-absorbing system for use in joint replacement arthroscopy has a bearing surface, a mounting base affixed to or formed with the bearing surface, a convex element extending outwardly of the mounting base opposite the bearing surface, a receptacle positioned so as to slidably or pivotably receive a portion of the convex element therein, a housing receiving at least a portion of the receptacle therein, and a resilient element received in the housing and bearing against a surface of the housing and against a surface of the receptacle.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: May 16, 2017
    Assignee: Masson Development LLP
    Inventors: Marcos V. Masson, Rafael R. Bernal
  • Patent number: 9636227
    Abstract: A hip stem prosthesis is provided for treating a deficient hip joint.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: May 2, 2017
    Assignee: Zimmer, Inc.
    Inventors: Natalia Fridshtand, Douglas W. Gabel, Steven Charlebois, David L. Glass, Steven Zawadzki, Jeffrey P. Matney
  • Patent number: 9554913
    Abstract: A shock-absorbing implant for use in shoulder arthroplasty has a bearing surface, a mounting base affixed to or formed with the bearing surface, a convex element extending outwardly of the mounting base opposite the bearing surface, a receptacle positioned so as to slidably or pivotably receive a portion of the convex element therein, a housing receiving at least a portion of the receptacle therein, and a resilient element received in the housing and bearing against a surface of the housing and against a surface of the receptacle. The bearing surface can be concave when the implant is used as a glenoid implant. The bearing surface can be convex when the implant is used as a humeral head implant.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: January 31, 2017
    Assignee: MASSON DEVELOPMENT LLP
    Inventors: Marcos V. Masson, Rafael R. Bernal
  • Patent number: 8945234
    Abstract: The present invention is directed to a prosthesis for an arthroplasty in a long bone and a methods for achieving a press fit of the metaphyseal element of the prosthesis into a metaphysis of the long bone and the extraction of the prosthesis when indicated. The prosthesis includes a metaphyseal element attached at a proximal end of a stem, the metaphyseal element of the prosthesis is configured to optimize placement of bone marrow about, and in some embodiments, within the metaphyseal element to achieve a press-fit in the metaphysis of the long bone. The prosthesis also includes one or more apertures formed in the joint base member of the prosthesis. Preferably each slot includes a frangible wall which is readily penetrated to accommodate passage of an osteotome of other tool to break the metaphyseal element free from bony in-growth that occurs against the metaphyseal element.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: February 3, 2015
    Assignee: Optimus Orthopedic Designs LLC
    Inventor: C. Scott Humphrey
  • Patent number: 8936649
    Abstract: A femoral prosthesis for use during performance of a hip replacement procedure includes a plurality of femoral stem components in a range of various sizes and a plurality of femoral head component in a range of various sizes. The anterior/posterior stem taper angle of the femoral stem component varies across its range of sizes.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: January 20, 2015
    Assignee: DePuy Synthes Products, LLC
    Inventor: Daniel N. Huff
  • Publication number: 20140207246
    Abstract: A femoral head prosthesis (110) comprises an articulating surface (112) which is more than hemi-spherical; an internal recess (114) having a longitudinal axis defining a pole P of the articulating surface (112), the longitudinal axis passing through the centre of curvature of the articulating surface (112); a first edge (116) which constitutes a posterior edge in use, and a second edge (118) which constitutes an anterior edge and/or an antero-inferior edge in use. The first edge (116) is further from the pole P than the second edge (118). Also provided is a femoral prosthesis comprising a femoral head, and a femoral implant comprising a femoral stem and a femoral head. The prostheses and implants of the invention find use in total hip replacements.
    Type: Application
    Filed: July 13, 2012
    Publication date: July 24, 2014
    Inventor: Derek James Wallace McMinn
  • Patent number: 8753405
    Abstract: The method of accurately and correctly fitting and axially positioning at implantable ball to the neck trunnion of a hip replacement device, as during surgery, the ball adapted to be received in a socket, the ball having a bore, the method including the steps providing the neck trunnion with deformable metallic surface ribs, providing a deformable adapter and fitting the adapter over the ribs, providing a trial ball having a non-metallic bore, and including axially forcibly fitting that bore over the deformable adapter to deform the adapter without deforming the ribs, as the trial ball adjustingly arrives at selected axial position on the neck trunnion corresponding to correct position of the trial ball in the socket, and correspondingly subsequent correct axial positioning of the implantable ball on the neck trunnion.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: June 17, 2014
    Inventor: Michael T. Kennedy
  • Patent number: 8702804
    Abstract: The present teachings are directed to a shoulder prosthesis having an adjustable radial offset and/or angular inclination provided by relative rotation of an adapter interdisposed between a stem and a head. In one example, a prosthesis has a stem having a first longitudinal axis. The prosthesis can also include an adaptor including a first taper. The first taper can have a first taper axis. The prosthesis can include a head supported by the adaptor. The head can be selectively oriented and then coupled to the first taper and the combination can be selectively orientated and the coupled to the stem.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: April 22, 2014
    Assignee: Biomet Manufacturing, LLC
    Inventors: Aaron P. Smith, Kevin T. Stone, Nicholas Cordaro
  • Patent number: 8562690
    Abstract: A femoral prosthesis for use during a revision procedure includes a proximal body, a distal stem, a modular neck, and a head. In operation, a surgeon may stabilize the proximal body and the distal stem of the prosthesis in a patient's femoral canal that has moderate loss of metaphyseal cancellous bone (known as a Paprosky Type I femoral defect), extensive loss of metaphyseal cancellous bone (known as a Paprosky Type II femoral defect), or extensive metaphyseal deterioration and some diaphyseal deterioration (known as a Paprosky Type IIIA femoral defect). Without disturbing this arrangement, the surgeon may then position the head in a desired location by selecting a desired modular neck to obtain proper joint kinematics.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: October 22, 2013
    Assignee: Zimmer, Inc.
    Inventor: Jeffrey Paul Dickerson
  • Patent number: 8465550
    Abstract: A line of cotyloid implants of different sizes including a cup intended to be fastened in a cotyloid cavity and including a substantially hemispherical polar portion and an equatorial portion extending the polar portion, the polar portion and the equatorial portion delimiting a substantially hemispherical inner cavity, an insert pivotally mounted in the inner cavity delimited by the polar and equatorial portions of the cup, the insert delimiting an inner cavity having an inner spherical surface portion and intended to pivotally and retentively mount a prosthetic femoral head, where the height of the equatorial portions of the cups of the various cotyloid implants belonging to the line varies in a decreasing manner as a function of the increase in the size of the cotyloid implants.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: June 18, 2013
    Inventors: Jean Claude Cartillier, Alain Machenaud, Tarik Ait Si Selmi, Jean-Charles Rollier, Michel Bonnin, Laurent Jacquoit, Bruno Balay, Claude Charlet, Michel Henri Fessy, Jean Marc Semay, Louis Setiey, Jean-Christophe Chatelet, Jean Pierre Vidalain
  • Patent number: 8449619
    Abstract: A surgical device includes a first portion and a second portion. The first and second portions are releasably connected together by cooperating first and second formations. The first formation may be formed on the first portion. The second formation includes a resilient arm which is formed on the second portion and engages the first formation on the first portion. The resilient arm may be integrally formed with the second portion.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: May 28, 2013
    Assignee: Biomet UK Limited
    Inventors: Nick James Theophilus Metcalfe, Robert John Andrew Bigsby
  • Patent number: 8366716
    Abstract: A trial head and shell for use in trial reduction of hip implants, and particularly bipolar implants, having locking features that prevent the head from dissociating from the shell during trialing, yet which allow the head and shell to be readily assembled and disassembled in the operating room. A cut-out region is formed in an outer bearing surface of the head. The cut-out region allows the head to pass through a trial shell opening and into the shell, yet is oriented such that when the head is associated with a femoral neck, the head cannot disassociate from the shell. Orientation indicators can be provided for use in assembly and disassembly. The trial head and associated shells can be provided in the form of a surgical kit including hip implants. Methods of use are provided.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 5, 2013
    Assignee: Wright Medical Technology, Inc.
    Inventors: Eric L. Hume, Anthony J. Svarczkopf
  • Patent number: 8277728
    Abstract: A pre-assembled orthopaedic implant adapted for improved gas sterilization. The implant includes a first component adapted for assembly with a second component such that a mating surface of the first component is in close proximity with a mating surface of the second component. At least one gas conduit associated with the mating surface of the first component facilitates a sterilizing gas to penetrate into and dissipate from the interface defined by the mating surfaces.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: October 2, 2012
    Assignee: Smith & Nephew, Inc.
    Inventors: Richard D. Lambert, Terry W. McLean, David B. Vogel
  • Patent number: 8142512
    Abstract: An instrument for use in a joint replacement procedure comprises a head part which corresponds to the head of an orthopaedic joint component, in which the head part has a bore formed in it, and a connector for connecting the head part to a stem part of the orthopaedic joint component, which is intended for location in the intramedullary cavity of a bone. The connector can be fitted into the bore in the head part in one of a plurality of angular orientations. It comprises a body part and a trigger which can be moved relative to the body part between an unlocked position in which the connector can be moved relative to the head part between different ones of the plurality of angular orientations and a locked position in which the connector is restrained against such movement.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: March 27, 2012
    Assignee: Depuy International Limited
    Inventors: James Brooks, Steven Gowers, Jonathan Thompson
  • Patent number: 8066778
    Abstract: An acetabular cup assembly can include a cup portion and a bearing. The cup portion can include a porous metal outer layer having a first thickness and a solid titanium inner layer having a second thickness. A mating feature can be formed between the cup portion and the bearing. The bearing can be adapted to be selectively secured to the titanium inner layer. In one example, the bearing is formed of cobalt.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: November 29, 2011
    Assignee: Biomet Manufacturing Corp.
    Inventors: Jason D Meridew, Troy W Hershberger
  • Patent number: 8034116
    Abstract: An orthopedic prosthetic implant comprises a metal alloy stem element (13, 63, 113), which has one end portion (19, 69, 119) constructed to reside in the medullary cavity of a bone and an integral connector (23, 73, 123) at the opposite end to which crystalline brittle head (17, 67, 117), preferably made of pyrocarbon-coated graphite, is joined. The head interfaces with human bone, and its effective joinder to the stem element is achieved through a polymeric insert (15, 65, 115) of proportional shape and design which has selected elastic properties. The design and material of the polymeric insert allow it to be securely received within an interior cavity (35, 77, 131) of the pyrocarbon-coated graphite head and mated to the stem connector in an either rigidly or bi-polar arrangement. The method of joinder allows the construction of composite implants that utilize the most desirable properties of metallic and brittle crystalline materials.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: October 11, 2011
    Assignee: Ascension Orthopedics, Inc.
    Inventors: Steve Vander Meulen, Jerome J. Klawitter
  • Patent number: 8025841
    Abstract: A pre-assembled orthopaedic implant adapted for improved gas sterilization. The implant includes a first component adapted for assembly with a second component such that a mating surface of the first component is in close proximity with a mating surface of the second component. At least one gas conduit associated with the mating surface of the first component facilitates a sterilizing gas to penetrate into and dissipate from the interface defined by the mating surfaces.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 27, 2011
    Assignee: Smith & Nephew, Inc.
    Inventors: Richard D. Lambert, Terry W. McLean, David B. Vogel
  • 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
  • Patent number: 7914584
    Abstract: A prosthesis includes a trunnion having a first end defining a uniform cross-section and a second end adapted to be fixed to a prosthesis stem. A ceramic head has a first bearing surface on which a second prosthesis fixed to a second bone can articulate. The ceramic head defines a recess. The first end of the trunnion is fixedly received within the recess. The second end of the trunnion is releasably connectable to the prosthesis stem by a taper connection.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: March 29, 2011
    Assignee: Biomet Manufacturing Corp.
    Inventors: Robert John Andrew Bigsby, Robert Andrew Scott
  • Patent number: 7854769
    Abstract: A method of implanting a modular hip stem implant having a stem portion and a body portion into a medullary canal of a patient's femur utilizing a two-incision technique. The stem portion is inserted through an anterior incision and the body portion is inserted through a posterior incision where they are interconnected in vivo. The modular hip stem implant is then driven into the medullary canal with force applied through either of the two incisions.
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: December 21, 2010
    Assignee: Biomet Manufacturing Corp.
    Inventor: Troy W. Hershberger
  • Publication number: 20100100193
    Abstract: A method of selecting a patient matched hip joint prosthesis includes identifying a plurality of first parameters of a hip joint anatomy of the patient. The method also includes selecting a standard modular neck member from a set of different standard modular neck members to substantially match the first parameters of the hip joint anatomy of the patient. Moreover, the method includes performing a hip joint mechanical analysis using the selected standard modular neck member. Further, the method includes choosing for implantation either the selected modular neck member, a different standard modular neck member, or a custom designed neck member based on the hip joint mechanical analysis.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Applicant: Biomet Manufacturing Corp.
    Inventor: John R. White
  • Patent number: 7662189
    Abstract: The specification discloses a modular system for the formation of a prosthesis for the replacement of a long bone in a human or animal body. The system provides a prosthesis comprising a proximal or distal end component such as a trochanter or condylar head, forming one component of a prosthetic joint, a shaft for assembly with the distal or proximal end component and a stem for engagement in a resected bone. The system allows the assembly of a custom fitted prosthesis from a limited range of components.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: February 16, 2010
    Assignee: Stanmore Implants Worldwide Ltd.
    Inventor: Jay Meswania
  • Patent number: 7597715
    Abstract: An orthopedic prosthesis for implantation into a bone of a patient includes a porous metal shell adapted to be affixed within the bone. The porous metal shell includes an outer surface adapted to receive bone ingrowth and an inner surface adapted to engage a liner. The porous metal shell is porous from the outer surface to the inner surface. A non-porous member may be affixed to the porous metal shell. The non-porous member may include a piercing member extending from the outer surface, the piercing member adapted to penetrate the bone in an implanted position. The non-porous member may include spikes or fins. In one example, the piercing member may define a reduced material cross section at an interface with the outer surface of the porous metal shell. The piercing member may be adapted to be broken at the reduced material cross section and removed from the porous metal shell.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: October 6, 2009
    Assignee: Biomet Manufacturing Corp.
    Inventors: David R Brown, Jason D Meridew, Robert M Ronk, Troy W Hershberger
  • Patent number: 7572297
    Abstract: A joint prosthesis may include a modular head member, a modular body member, and a stem member. The stem member may be so tapered as to be engageable by taper press-fit into the medullary cavity of a bone. The body member may be engageable in the stem member by friction-tight press-fit at a zone of diametrical interference.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: August 11, 2009
    Assignee: OMNI life science, Inc.
    Inventors: Edward J. Cheal, George B. Cipolletti
  • Publication number: 20080243264
    Abstract: A method for arthroplasty includes using a self-locking prosthesis that has a member structured to transfer a load produced by the weight of a patient to a bone. An expandable bone-locking portion that is integral to the member includes a shape-memory material and expands to produce a locking force. A portion of the bone is removed to form an aperture in the bone. The bone-locking portion is inserted into the aperture, and a temperature increase causes a change from a contracted state to an expanded state resulting in expansion of the bone-locking portion so as to contact the inner surface. The expanding is sufficient to create a locking force at the junction between the inner surface and the bone-locking portion of the prosthesis and the majority of the locking force is applied at or above the metaphysis. The length/width ration of the prosthesis may be less than or equal to 5. The resulting reconstructed long-bone may have improved primary and long-term stability.
    Type: Application
    Filed: March 25, 2008
    Publication date: October 2, 2008
    Inventor: Matthew V. Fonte
  • Publication number: 20080133023
    Abstract: The present invention relates to provisional prosthetic components for a medical device and the surgical methods for utilizing the same. In one embodiment, the provisional prosthetic component includes a first portion and a core. The first portion is capable of mating with another prosthetic component. The first portion of the provisional prosthetic component may have a scratch hardness which is less than the scratch hardness of the prosthetic component. This allows for the first portion to be placed in mating engagement with the prosthetic component without scratching or damaging the junction of the prosthetic component. Additionally, the core of the provisional prosthetic component may have a scratch hardness greater than the scratch hardness of the first portion of the provisional prosthetic component and/or a stiffness sufficient to minimize deflection of the provisional prosthetic component during trial reduction and range of motion testing.
    Type: Application
    Filed: October 5, 2006
    Publication date: June 5, 2008
    Applicant: ZIMMER TECHNOLOGY, INC.
    Inventors: Ryan D. Schlotterback, Barish Banerjee, Randy G. Smythe
  • Patent number: 7211113
    Abstract: An endoprosthesis utilizes a biomechanical structure based on the lever model of first degree. Contrary to the widespread practice, the inventive structure has a stem placed inside the femur bone, which is not rigidly attached to this bone. Accordingly, the bone, following its known tendency to slightly pivot away from the medial plane of the body in response to the loads, does not directly contact the stem. The neck portion experiences even greater loads then the stem. The supporting anchor has a region extending laterally from the stem and pressing against a supporting surface of the housing, which also extends laterally from the body of the housing. Since the stem, supporting anchor and neck are typically constitute a one-piece component, the lateral surfaces of the supporting anchor and housing are in continuous frictional contact during displacement of the stem and housing relative to one another.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: May 1, 2007
    Inventors: Lev Zelener, Konstantin Sherepo, Marina Zelener, Anton Svetlanov
  • Patent number: 7122056
    Abstract: A modular prosthesis is disclosed that includes a neck member having a tapered neck body. The modular prosthesis further includes a sleeve component having a first elongated tapered bore. The tapered neck body is received within the first elongated tapered bore so as to taper lock the sleeve component to the neck member. The modular prosthesis also includes a stem member configured to be implanted into a medullary canal of a bone. One of the neck member and the stem member includes a second elongated tapered bore. The other of the neck member and the stem member includes a tapered post that is received within the second tapered bore so as to taper lock the neck member to the stem member.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: October 17, 2006
    Assignee: DePuy Orthopaedics, Inc.
    Inventors: Kimberly A. Dwyer, Larry G. McCleary, AlFred DeCarlo
  • Patent number: 7051417
    Abstract: The present invention is a specialized orthopedic implant having an exterior surface for engaging bone. The surface comprises arrayed projections having at least one forward facing facet directed at least in part toward the leading end of the implant and at least one rearward portion directed at least in part toward the opposite trailing end of the implant. Each of the forward facet and rearward portion has a length and a slope. The length of the forward facet is longer than the length of the rearward facet. The slope of the rearward facet is steeper than the slope of the forward facet. The surface projections also have opposed side facets directed generally toward the sides of the implant. The side facets are located between the forward facet and rearward facet and converge toward each other in a direction away from the base of the surface projections. The surface may also include projections having left and right forward side facets and a rearward facet.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: May 30, 2006
    Assignee: SDGI Holdings, Inc.
    Inventor: Gary K. Michelson
  • Patent number: 6969406
    Abstract: A prosthetic element comprising two principal components which are assembled together and immobilized with respect to each other by a screw which may be selectively threaded into at least one tapping in at least one of the principal components. The screw comprises at least one radial element adapted to abut against a stop surface within the first component, and a non-threaded end forming a guide which is adapted to slide in a bore in the second component.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: November 29, 2005
    Assignee: Tornier SA
    Inventor: Alain Tornier
  • Publication number: 20040226343
    Abstract: The invention concerns a device for testing, in a destructive or non-destructive manner, femoral head prosthesis having a blind hole for receiving the end of a femoral prosthesis rod. The device includes a frame provided with a shaft projecting from the frame, said shaft having a substantially complementary shape to said bore and being associated with means for applying a pressure onto the inner bore wall when a femoral head is fitted onto said shaft.
    Type: Application
    Filed: February 11, 2004
    Publication date: November 18, 2004
    Applicant: Saphirwerk Industrieprodukte AG
    Inventors: Jean Babler, Jurg Burri, Hans Felber, Urs Buntschu, Werner Salvisberg
  • Publication number: 20040225370
    Abstract: The invention relates to a hip prosthesis having a shaft (1) which is implantable in the femur, and having a ball head (2) anchored on the shaft (1) by a conical clamp, for example, and having a socket (5) in which the ball head (2) is movably supported.
    Type: Application
    Filed: January 30, 2004
    Publication date: November 11, 2004
    Inventors: Patrick Cruchet, Uwe Bunz, Bernard Masson, Paul Silberer, Martin Dietrich
  • Publication number: 20040172139
    Abstract: A modular prosthesis is disclosed that includes a neck member having a tapered neck body. The modular prosthesis further includes a sleeve component having a first elongated tapered bore. The tapered neck body is received within the first elongated tapered bore so as to taper lock the sleeve component to the neck member. The modular prosthesis also includes a stem member configured to be implanted into a medullary canal of a bone. One of the neck member and the stem member includes a second elongated tapered bore. The other of the neck member and the stem member includes a tapered post that is received within the second tapered bore so as to taper lock the neck member to the stem member.
    Type: Application
    Filed: March 2, 2004
    Publication date: September 2, 2004
    Inventors: Kimberly A. Dwyer, Larry G. Cleary, AlFred DeCarlo
  • Publication number: 20040162621
    Abstract: A femoral neck fixation prosthesis and method of using same which reduces bone loss and the avoids the other shortcomings of the prior art by allowing the fixation of a stable femoral head replacement while reducing the amount of the femur which must be reamed for the insertion of the prosthesis. The preferred embodiment provides that the femoral head is attached to a fixation prosthesis which extends coaxially through the canal of the femoral neck, into the femur, and is then attached to the opposite lateral wall of the femur. In this manner, the prosthesis serves to imitate the original structure of the femoral neck. No other support members, either crosspins or arms extending into the length of the femur, are required.
    Type: Application
    Filed: February 14, 2004
    Publication date: August 19, 2004
    Inventor: Theodore W. Crofford
  • Publication number: 20040030400
    Abstract: In a joint prosthesis the head cap is connected via a collar piece to the shaft piece which may be anchored in the bone. The collar piece is coupled to the shaft piece by a joint head in a ball-jointed manner. The articulation surfaces between the joint cavity in the shaft piece and the articulation head on the collar piece are embodied such that on pressing the articulation head to the base of the joint cavity, edges or projections on the one articulation surface digs into the other articulation surface lying on a virtual spherical surface. It is thus possible to achieve a ball-joint like articulation, whereby the spherical surfaces may have a relatively large production tolerance without the above affecting the clamping connection between the articulation surfaces.
    Type: Application
    Filed: May 16, 2003
    Publication date: February 12, 2004
    Inventor: Willi Horber
  • Publication number: 20030181987
    Abstract: A method of restoring a hip replacement prosthesis is described wherein the prosthesis comprises a stem, a femoral head and an acetabular shell having a polyethylene liner, the liner having become worn or damaged. The method comprises removing the liner and replacing it with a hard surface liner, securing it to the acetabular shell, the hard surface liner being shaped to fit the femoral head. The method is carried out without disrupting the fixing of the stem and/or the acetabular shell.
    Type: Application
    Filed: April 3, 2003
    Publication date: September 25, 2003
    Inventor: Sarah Muirhead-Allwood
  • Publication number: 20020151978
    Abstract: Skeletal implant of the type to be used for connecting at least two elements of the skeleton. The implant has at least two parts. Each of the parts is capable of being connected to one of the elements. The implant also uses at least one shock-absorbing device located between the at least two parts. The shock-absorbing device has an adjustable coefficient of resistance.
    Type: Application
    Filed: January 9, 2002
    Publication date: October 17, 2002
    Inventors: Fred Zacouto, Efren Vigil Caballero, Jose Angel Alvarez Canal
  • Publication number: 20020138151
    Abstract: A cementless femoral hip stem component. The hip stem component includes an elongate stem, a proximal body, and a collar disposed on the proximal body and extending outward therefrom in a sideways direction to form a ledge. The proximal body defines at least a majority of a frustoconical shape. The ledge formed by the collar includes a tapered undersurface, beneath which extends the proximal body. The tapered undersurface of the ledge and the proximal body extend in different directions and thereby cooperatively define a double-flared contact surface configured to enable subsidable engagement of said double-flared contact surface with the femur at two different rates of subsidence within the femur. An abrupt, male corner is formed by the stem and the proximal body and is sufficiently abrupt to provide enhanced bone ingrowth stimulation.
    Type: Application
    Filed: October 9, 2001
    Publication date: September 26, 2002
    Applicant: Ortho Development Corporation
    Inventors: Barry Hubbard, Timothy McTighe, Jerry Kee, Paul Mraz
  • Publication number: 20020116068
    Abstract: Methods, systems and devices for preventing prosthetic articulating surfaces from separating from each other. A containment system according to one embodiment seeks to prevent an implant stem head from dislocating from a prosthetic component while providing an increased range of motion over conventional contrained components. In one embodiment, an implant structural member includes a cavity and an opening having a lip, including a web along a portion of the lip. An implant stem head has a cooperating surface that corresponds with the web, so that when the cooperating surface of the implant stem head is aligned with the web, the head may be inserted into the implant structural member. The implant stem head is then rotated and the femoral stem component attached, thereby preventing dislocation of the head.
    Type: Application
    Filed: January 24, 2002
    Publication date: August 22, 2002
    Inventor: Terry McLean
  • Publication number: 20020059000
    Abstract: A modular femoral prosthesis includes a stem member adapted to be implanted into a medullary canal of a femur. The stem member has a continuously tapered elongated bore and a threaded aperture defined therein. A first end of the elongated bore defines a post-receiving opening. The post-receiving opening is defined in a proximal end surface of the stem member. The elongated bore extends between the post-receiving opening and a threaded aperture. The femoral prosthesis also includes a neck member having a neck body, a head-receiving support member secured to the neck body so as to extend outwardly therefrom, and a tapered post secured to the neck body so as to extend outwardly therefrom. The tapered post is adapted to be received into the elongated bore of the stem member. A method of performing a joint replacement procedure by use of a modular prosthesis is also disclosed.
    Type: Application
    Filed: October 23, 2001
    Publication date: May 16, 2002
    Inventors: Kimberly A. Dwyer, Larry G. McCleary, Alfred DeCarlo