Femoral Stem Structure Patents (Class 623/20.36)
  • Publication number: 20150142124
    Abstract: A reinforcing implant anchors shafts of two prostheses which are arranged opposite each other on an elongated bone, in particular a femur. The implant has a generally elongated shaft-like shape and a receiving sleeve at both ends for a respective anchoring shaft and a disconnectable coupling piece lying between the receiving sleeves for a rigid connection. In this manner, a force bridge is formed between the two anchoring shafts so that the bone is no longer subjected to the force transmission in particular in the sensitive intermediate region between the two anchoring shafts.
    Type: Application
    Filed: May 8, 2013
    Publication date: May 21, 2015
    Inventor: Helmut D. Link
  • Patent number: 8998996
    Abstract: A modular knee prosthesis system includes a femoral component having a stem and a sleeve. The system is modular, and provides the surgeon with the option of distally offsetting the joint line by controlling the relative axial positions of the stem and the sleeve. Alternative options include providing sleeves with tapered bores of different diameters, providing a shim to be placed between the sleeve and the stem and providing the stems as adapters having different diameters.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 7, 2015
    Assignee: Depuy (Ireland)
    Inventors: Peter J James, Richard E Jones, Benjamin J Sordelet, Timothy G Vendrely, Stephanie M Wainscott
  • Patent number: 8926708
    Abstract: An implant assembly comprises a stem and an augment. The augment includes a porous outer region which is integrally formed onto a solid inner region. The augment further includes, solid posts integrally formed on the solid inner region and extend through the porous outer region to the outer surface of the augment. The posts are integrally formed with and surrounded by the porous region and are designed to allow assembly of the augment to the stem without damaging the structure of the porous region. A method of attaching the augment is described, wherein a tool is designed to grip to posts of the augment and apply loads through these posts during assembly.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: January 6, 2015
    Assignee: Howmedica Osteonics Corp.
    Inventors: Damon J. Servidio, G. Douglas Letson
  • Patent number: 8926709
    Abstract: An orthopaedic implant including a base portion and first and second transverse portions extending transversely from the base portion to thereby define an inner region of the implant sized for receipt of an end portion of a bone therein. The implant further includes at least one anchor structure projecting from the base portion and sized and configured for receipt within an opening formed in the end portion of the bone. The anchor structure extends along a longitudinal axis and includes a proximal end attached to the base portion and an opposite distal end, and further includes a tapered outer surface that inwardly tapers in a proximal-to-distal direction along the longitudinal axis. In one embodiment, the anchor structure also includes one or more grooves extending into the tapered outer surface, with a flowable material positioned about at least a portion of the tapered outer surface and positioned within the grooves, and with the flowable material configured to cure to a hardened state.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: January 6, 2015
    Assignee: Smith & Nephew, Inc.
    Inventors: Nathaniel Milton Lenz, Zachary Christopher Wilkinson
  • Patent number: 8920152
    Abstract: The present teachings provide a modular articulating cement spacer mold for forming a temporary implant comprising a mold first portion, a mold second portion, and a ventilation forming surface feature on an interior surface of at least one of the mold first portion or the mold second portion. The first mold portion and the second mold portion have corresponding interior surfaces that form a cavity therebetween.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: December 30, 2014
    Assignee: Biomet Manufacturing, LLC
    Inventors: H. Gene Hawkins, William Hartman, Kristen Martin, Nathan A. Winslow
  • Patent number: 8888858
    Abstract: Various embodiments of femoral trochlea prostheses useable in a knee joint. The knee joint includes a patella and a distal femur with a femoral trochlea, or patello-femoral groove. In one embodiment, a femoral trochlea prosthesis includes a distal tail. In another embodiment, a femoral trochlea prosthesis includes a wing or extension portion. In yet another embodiment, a set of femoral trochlea prostheses includes a plurality of prostheses having differing thicknesses. In still another embodiment, a femoral trochlea prosthesis includes a porous medium on various portions of the prosthesis.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: November 18, 2014
    Assignee: Zimmer, Inc.
    Inventors: Jeffrey D. Brown, Adam M. Griner, Robert A. Hodorek, Raymond C. Parisi, Brian E. Vanskyock, Justin J. May, James C. Harris
  • Publication number: 20140277551
    Abstract: An implantable orthopaedic knee prosthesis assembly includes a femoral component, a stem component, a fastener, and a retention device. The femoral component is configured to be implanted into a distal end of a femur of a patient and includes a stem post having a proximal tapered bore, a distal passageway, and a threaded passageway connecting the proximal tapered bore and the distal passageway. The stem component is configured to taper fit to the femoral component and includes a bore formed therein extending proximally and a threaded aperture defined at a proximal end of the bore. The head of the fastener is configured to be received in the distal passageway, whereas the proximal end of the shaft of the fastener is configured to be positioned in the threaded aperture. The retention device is received in the threaded passageway and prevents the proximal end of the fastener from reentering the threaded passageway.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Gary M. Lindsay, Tyler S. Hathaway, Aaron J. Matyas, Joseph G. Wyss, Filip Leszko
  • Publication number: 20140277536
    Abstract: A knee prosthesis for use during performance of a knee replacement procedure includes a plurality of stem components in a range of various sizes, a plurality of femoral components in a range of various sizes, and a plurality of tibial trays in a range of various sizes. Each of the stem components is compatible with each of the femoral components and the tibal trays. Some of the stem components have a single slot formed therein, with other stem components having a pair of slots formed therein.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Inventor: Filip Leszko
  • Publication number: 20140277550
    Abstract: A method for joint line assembly of an orthopaedic prosthesis assembly includes inserting a tapered post of a first prosthetic component into a tapered bore of a second prosthetic component along a longitudinal axis to secure the first prosthetic component to the second prosthetic component. A shaft of a fastener is advanced along the longitudinal axis through a threaded passageway defined in the second prosthetic component and into the first prosthetic component. The threaded passageway has a greater diameter than a diameter of the shaft. The end of the shaft is threaded into a threaded aperture defined in the first prosthetic component.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Gary M. Lindsay, Stephanie M. Wainscott, Tyler S. Hathaway, Aaron J. Matyas, Joseph G. Wyss, Filip Leszko
  • Publication number: 20140236309
    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: Application
    Filed: April 21, 2014
    Publication date: August 21, 2014
    Applicant: BIOMET MANUFACTURING, LLC
    Inventors: Aaron P. SMITH, Kevin T. STONE, Nicholas M. CORDARO
  • Patent number: 8778029
    Abstract: For replacing a human hip or knee joint and the adjoining bone sections, an implantable prosthesis is provided, comprising a joint replacement part (10), a shaft replacement part (12) and a rod-shaped shaft anchoring part (16) being insertable into an axial cavity (14) in the shaft replacement part (12).
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: July 15, 2014
    Inventor: Rainer Baumgart
  • Publication number: 20140094923
    Abstract: A femoral prosthesis system is provided which includes femoral prosthesis and an instrument for inserting/extracting the femoral prosthesis. The femoral prosthesis includes a stem and a neck portion. The stem includes a proximal end portion which defines a proximal stem axis. The neck portion is located proximally of the proximal end portion. The neck portion includes a proximal surface and an insertion/extraction cavity which extends distally from the proximal surface. The insertion/extraction cavity is configured to couple with the insertion/extraction instrument. The insertion/extraction cavity defines an insertion/extraction cavity axis which, when projected onto a coronal plane including the proximal stem axis, is not parallel with the proximal stem axis. The insertion/extraction instrument includes a distal end portion configured to couple with the insertion/extraction cavity.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Applicant: DePuy Products, Inc.
    Inventors: Daniel N. Huff, Ian G. Delaney, Joel M. Matta
  • Publication number: 20140067077
    Abstract: A knee prosthesis constructed in accordance to the present disclosure includes a femoral component and a boss. The femoral component can have a first condylar portion and a second condylar portion connected by an inner condylar portion that defines an intercondylar recess, the inner condylar portion having a first engagement portion comprising a first plurality of engaging members extending therefrom. The boss can have a longitudinal body extending along a boss axis between first and second ends. The first end can be configured to selectively mate with a stem. The second end can include a second engagement portion comprising a second plurality of engaging members extending therefrom. The second engagement portion of the boss can be selectively coupled to the first engagement portion of the femoral component in a plurality of discrete positions to attain a corresponding plurality of angles of the boss axis relative to the femoral component.
    Type: Application
    Filed: August 30, 2012
    Publication date: March 6, 2014
    Applicant: BIOMET MANUFACTURING CORP.
    Inventor: Curt Collard
  • Patent number: 8540775
    Abstract: In order to improve a modular implant part for replacing a part of a natural knee joint with an implant component comprising a shaft extending away from the implant component and a connecting device for connecting the shaft to the implant component such that the shaft is adapted to be fixed to the implant component in a multiplicity of desired positions in a simple manner, it is proposed that the connecting device be formed in such a manner that, in a mounting disposition, the shaft is adapted to be moved into different translatory positions by a translatory movement in a direction transverse or substantially transverse to its longitudinal axis, and that, in an implantation disposition, the shaft is adapted to be fixed immovably to the implant component in one of the different translatory positions. Furthermore, an improved knee joint prosthesis is proposed.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: September 24, 2013
    Assignee: Aesculap AG
    Inventors: Jan Reich, Uwe Idler
  • Patent number: 8430932
    Abstract: A system for use in a total knee arthroplasty procedure can include a first cutting guide, an alignment guide and a femoral prosthetic implant. The first cutting guide can include at least one planar guide surface adapted to guide a cutting tool to cut femur. The alignment guide can contact the femur and provide for markings to be made in the femur that dictate a location and orientation of the first cutting guide. The implant is adapted to be implanted on the resected femur. The implant can have an inwardly protruding structure to provide medial-lateral fixation stability, and can have an anterior fixation path that diverges proximally away from a long axis of the femur and a posterior fixation path that converges proximally towards the long axis such that the posterior fixation path and anterior fixation path converge toward one another proximally of a distal contact surface.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: April 30, 2013
    Assignee: Puget Bio Ventures LLC
    Inventor: Timothy G. Haines
  • Publication number: 20120245700
    Abstract: A bio-compatible femoral stem is made from a bio-compatible titanium alloy or cobalt-chromium alloy, each of which have an elastic modulus far greater than that of natural bone. When the implant heals within a bone cavity, the implant essentially carries substantially the entire load. Transfer of load to the surrounding bone tissue is lost or resorbed due to lack of use after implant healing. Flexing a stiff implant applies a very large load at the implant distal end. The bone cortex is thereby allowed to thicken due to excessive load, causing thigh pain long after implant healing. The femoral implant has a bone ingrowth coating on the proximal end, allowing firm attachment of the implant in the bone cavity. The distal end has a central aperture and a helical machined groove that permits flexing of the distal portion of the femoral implant stem. This flexing is occurs in a manner similar to surrounding bone tissue, preventing thigh pain.
    Type: Application
    Filed: March 24, 2011
    Publication date: September 27, 2012
    Inventor: Christopher G. Sidebotham
  • Patent number: 8226727
    Abstract: The present invention relates to a femoral prosthesis that includes a cement introduction port which may be used to facilitate delivery or introduction of bone cement into the prosthesis/bone interface after the prosthesis component has been placed on a resurfaced femur bone. The femoral prosthesis may have a keel with undercuts which are configured to assist in controlling the flow of bone cement during implantation and to improve stability of the prosthesis following implantation. The femoral prosthesis is suitable for implantation using arthroscopic, as well as open, surgical procedures. The present prostheses may be used as unicondylar implants in either compartment of the knee or in both compartments of the knee.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: July 24, 2012
    Assignee: VOT, LLC
    Inventors: Ron Clark, David Blakemore, Ross Mack
  • Patent number: 8163028
    Abstract: A prosthesis for replacing a knee joint between a femur and a tibia can include a femoral component having a first condylar portion, a second condylar portion, a first sidewall and a second sidewall that collectively comprise a first hinge portion. A tibial component can have a first engagement portion formed thereon. A bearing can have an articulating inferior surface adapted to articulate along the bearing. The bearing can have an opening. A yoke can have an inferior portion and superior portion, the superior portion having an axle that comprises a second hinge portion. The inferior portion can have a second engagement portion and be configured to at least partially pass through the opening. The femoral component is operable to rotate relative to the tibial component about a superior/inferior axis a first rotational distance until the first and second engagement portions engage each other and inhibit further rotation.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: April 24, 2012
    Assignee: Biomet Manufacturing Corp.
    Inventors: Robert Metzger, Audra Watson, Nathan E. Belcher
  • Patent number: 8157869
    Abstract: A modular knee prosthesis can include a femoral component having a superiorly extending portion, a first femoral bearing surface and a second femoral bearing surface. The superiorly extending portion can define a first tapered augment receiving surface. A tibial component can have an inferiorly extending portion and a tibial bearing surface. The inferiorly extending portion can define a second tapered augment receiving surface. A first augment can define a first receiving bore and a first stepped surface. A second augment can define a second receiving bore and a second stepped surface. The first and second augments are adapted to mate at the first and second stepped surfaces in a first position at the first tapered augment receiving surface of the femoral component and in a second position at the second tapered augment receiving surface of the tibial component.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: April 17, 2012
    Assignee: Biomet Manufacturing Corp.
    Inventors: Robert Metzger, Audra Watson, Brian M. May, Duke A. Fox
  • Patent number: 8088167
    Abstract: Methods and apparatus for knee arthroplasty, including implants, positioning and alignment guides, cutting guides, cutting tools and techniques for the femur and/or tibia.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: January 3, 2012
    Assignee: Hudson Surgical Design, Inc.
    Inventor: Timothy G. Haines
  • Patent number: 8062377
    Abstract: Methods and apparatus for knee arthroplasty, including implants, positioning and alignment guides, cutting guides, cutting tools and techniques for the femur and/or tibia.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 22, 2011
    Assignee: Hudson Surgical Design, Inc.
    Inventor: Timothy G. Haines
  • Patent number: 7998217
    Abstract: A modular device for coupling a stem to an end component of an implant. The device includes a plurality of rotatably interconnectable intermediate components for coupling the stem to the end component, such that each intermediate component can be rotated for selectively changing a total offset between the stem and the end component by a relative offset.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: August 16, 2011
    Assignee: Biomet Manufacturing Corp.
    Inventor: David R Brown
  • Patent number: 7998218
    Abstract: A modular implant system operable to implant into a selected portion of the anatomy. The modular implant system may include an adaptor to allow for interconnection of disparate connection portions to allow for connecting a plurality of connection types. Expanding the modularity of an implant system by allowing interconnection of a plurality of modular implant systems.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: August 16, 2011
    Assignee: Biomet Manufacturing Corp.
    Inventor: David R Brown
  • Patent number: 7993407
    Abstract: An orthopaedic prosthesis includes a femoral component configured to be coupled to a surgically-prepared surface of the distal end of a femur and a plate having an aperture defined therein. The plate is configured to be coupled to the femoral component in one of a number of orientations such that the location of the aperture is adjustable based on the orientation of the plate. The orthopaedic prosthesis also includes a stem configured to be coupled to the femoral component via a bolt. The position of the stem relative to the femoral component is adjustable based on the orientation of the plate.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 9, 2011
    Assignee: DePuy Products, Inc.
    Inventor: Jeffery L. Koenemann
  • Publication number: 20110160867
    Abstract: A method for preparing a femoral neck for receiving a neck implant includes obtaining image data of a proximal femoral bone and femoral neck of a patient by a medical imaging method and constructing a three-dimensional image model of the proximal femoral bone and neck of the patient using the image data. The method further includes identifying a three-dimensional cortical boundary surface at an interface between cortical and cancellous bone of the patient using the image model. A patient-specific broach having a three-dimensional cutting surface closely matching and complementary to the cortical boundary surface of the patient using the image model is designed and manufactured.
    Type: Application
    Filed: March 7, 2011
    Publication date: June 30, 2011
    Applicant: BIOMET MANUFACTURING CORP.
    Inventors: JASON D. MERIDEW, JOHN R. WHITE, ROBERT METZGER
  • Patent number: 7935151
    Abstract: Methods and apparatus for knee arthroplasty, including implants, positioning and alignment guides, cutting guides, cutting tools and techniques for the femur and/or tibia.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: May 3, 2011
    Assignee: Hudson Surgical Design, Inc.
    Inventor: Timothy G. Haines
  • Publication number: 20110082560
    Abstract: The invention relates to a prosthetic body for an upper leg prosthetic comprising a shaft (5, 5a, 5b) having a proximal support plate (4) for a prosthetic head (15), wherein at least two proximally spaced and distally converging shaft posts (5a, 5b) are mounted on the support plate (4), descending below the same and connected by struts (6), particularly diagonal struts (6), and wherein cavities (12), and/or free open regions (12) are formed between the shaft posts (5a, 5b) and the struts (7), into which spongy bone can grow, wherein at least the lower connecting area of the support plate (4) whereon the shaft posts (5a, 5b) are mounted is disposed horizontally, the support plate (4), extending medially over the cross section of the shaft (5, 5a, 5b), immediately below the connection areas, and the support plate (4) transitioning ventrally and dorsally into the shaft (5, 5a, 5b) without protruding.
    Type: Application
    Filed: March 16, 2009
    Publication date: April 7, 2011
    Inventors: Franz Copf, Desirée Copf, Peter Copf
  • Publication number: 20110054626
    Abstract: An orthopaedic implant includes a knee prosthetic component, adaptor, and stem extension. The adaptor includes a first mounting end and a second mounting end. The first mounting end is coupled to the knee prosthetic component, and the second mounting end is coupled to the stem extension. The first mounting end of the adaptor defines a first axis, and the second mounting end of the adaptor defines a second axis. The first axis is offset from and parallel to the second axis when viewed in a first anatomical plane. Additionally, the first axis and second axis define an angle therebetween when viewed in a second anatomical plane. In some embodiments, the second mounting end may be movable with respect to the first mounting end. In other embodiments, the adaptor may be integral with the stem extension. Additionally, in some embodiments, the adaptor may be embodied as multi-piece adaptor.
    Type: Application
    Filed: November 8, 2010
    Publication date: March 3, 2011
    Inventors: Kyle Thomas, Timothy G. Vendrely
  • Patent number: 7892288
    Abstract: A femoral augment, or set of augments, for use with a knee joint prosthesis, where the femoral augment includes a main body portion, an aperture formed within the main body portion and extending in a generally distal/proximal direction, and a pair of legs extending outwardly from said main body portion in a generally posterior direction. In the preferred embodiment, the aperture is configured to receive a stem extension implant, and to allow it to pass through. Additionally, the legs of the femoral augment are preferably configured to be seated proximal of a proximal side of a pair of condylar portions of a femoral component of a knee joint prosthesis. The present invention is intended for situations in which the distal portion of the femur is defective, and it provides a method and devices that allow for preservation of healthy peripheral bone, while still providing the necessary augmentation to the distal portion of the femur.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: February 22, 2011
    Assignee: Zimmer Technology, Inc.
    Inventors: Jeff Blaylock, Michael Cook, Ron Donkers, Scott Dykema, Maleata Hall, John Meyers, Arlen D. Hanssen, David G. Lewallen
  • Patent number: 7867282
    Abstract: A modular implant system includes a set of anatomically-designed diaphyseal fitting and filling modular implant components and adapters for connection to another implant component such as a modular articular component, a segmental component or an intercalary component. The other end of each diaphyseal component is a tapered porous surface. The tapered porous surface is received with a tapered bore in the bone diaphysis that is prepared to match the size and shape of the tapered porous surface. The diaphyseal implant is easy to insert and remove, does not bind before fully seating, and is designed to prevent stress shielding. The diaphyseal sleeve eliminates the long lever arm created when fixation occurs only at the tip of the stem, and should therefore eliminate related stem loosening.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: January 11, 2011
    Assignee: Depuy Products, Inc.
    Inventors: Robert K. Heck, Stephen A. Hazebrouck
  • Patent number: 7862619
    Abstract: The present invention relates to a knee joint prosthesis including femoral and tibial components. The bodies of the components possess a network of channels which may be used to deliver bone cement to the component bone interface after the components are implanted. The body of the femoral component possesses a network of channels which is in communication with a bore on the distal surface of the component which may be used to deliver bone cement into the network of channels after the component is implanted. The body of the tibial component possesses a network of channels which is in communication with a bore on the proximal surface of the component which may be used to deliver bone cement into the network of channels after the component is implanted. The components are suitable for implantation using arthroscopic as well as open surgical procedures. The components may be used as unicondylar implants in either compartment of the knee or in both compartments of the knee.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: January 4, 2011
    Assignee: VOT, LLC
    Inventor: Ron Clark
  • Patent number: 7837737
    Abstract: A total stabilized femoral knee prosthesis is disclosed. Such prosthesis is capable of being formed with varying condyle thicknesses, and may include a stem, stabilizer box and articular surface. Methods of implanting such a prosthesis, as well as of manufacturing same are also disclosed herein.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: November 23, 2010
    Assignee: Howmedica Osteonics Corp.
    Inventors: Anthony K. Hedley, Damon Servidio
  • Publication number: 20100222891
    Abstract: A modular knee implant system allows a surgeon to select between several different styles of distal femoral implant components and several different styles of stem extensions while also allowing for use of a metaphyseal component. The metaphyseal component can be a universal one that is usable with all of the styles of distal femoral implant components through use of an adapter. A second adapter allows for use of stem extensions with different types of connectors with the metaphyseal component. A separate metaphyseal component could also be provided with a distal Morse taper post to mate with a distal femoral component having a proximal Morse taper bore. The metaphyseal component may have an outer surface that is configured to maximize contact area with the patient's bone, and may have a surface finish over a substantial part of its overall length that is conducive to bone ingrowth.
    Type: Application
    Filed: May 17, 2010
    Publication date: September 2, 2010
    Applicant: DEPUY PRODUCTS, INC.
    Inventors: GARY P. GOODFRIED, STEPHEN A. HAZEBROUCK, MARK B. LESTER, SCOTT C. BROWN
  • Publication number: 20100217401
    Abstract: An antibiotic delivery system including an intramedullary stem that is adapted to be removably mounted into a medullary canal of a bone. The stem includes a body having an inlet adapted to be in fluid communication with a source of liquid-borne antibiotic and a plurality of outlets disposed along the stem. A channel extends between the inlet and the plurality of outlets for delivering a fluid-borne antibiotic from the inlet to the plurality of outlets so as to distribute the antibiotic along the medullary canal in a controlled fashion. A method of treating an infected joint during a two-stage re-implantation of an orthopedic implant is also disclosed.
    Type: Application
    Filed: February 25, 2010
    Publication date: August 26, 2010
    Inventor: Brian C. de Beaubien
  • Publication number: 20100152859
    Abstract: A prosthetic femoral implant for use in hip arthroplasty comprises an elongate femoral stem. In addition, the femoral implant comprises a femoral neck having a central axis, a first end integral with the femoral stem, and a second end distal the femoral stem. A transverse cross-section of the femoral neck includes a medial-lateral axis and an anterior-posterior axis. Moreover, a reference circle bisected by the medial-lateral axis and passing through the medial-most point and the lateral-most point has a diameter equal to a maximum medial-lateral width Wml of the transverse cross-section and an area A1. The lateral-most anterior segment of the transverse cross-section includes a laterally expanded area extending outside the reference circle, the laterally expanded area having an area A2 that is at least 7% of one-fourth of the area A1 of the reference circle.
    Type: Application
    Filed: October 29, 2009
    Publication date: June 17, 2010
    Inventors: Matthew T. Thompson, Rikin V. Patel
  • Patent number: 7727281
    Abstract: A knee prosthesis includes a femoral component and a stem for implanting in a femur. A modular junction is provided for attaching the stem to the femoral component. The femoral component may include a boss having a slot for receiving the components of the modular junction. A portion of the modular junction may be placed within the slot and the modular junction may be tightened in place on the boss by threading the stem into engagement with a portion of the modular junction. Accordingly, the stem may be connected to the femoral component by a single threaded engagement and the position of the stem may be adjusted to any desired location along the anterior-posterior direction on the femoral component.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: June 1, 2010
    Assignee: Ortho Development Corporation
    Inventor: Michael D. Ensign
  • Publication number: 20090265011
    Abstract: A femoral component of an artificial knee joint is configured with multiple different facets which are similar in size and shape for many different sizes, to simplify an associated method for forming a distal end of the femur to receive the femoral component. Jig embodiments are provided to form surfaces on a distal end of a femur to correspond with facets of the femoral component, with the same jig usable for femoral components of differing size. The femoral component includes medial and lateral condylar legs with a posterior facet of the femoral component exhibiting a negative angle relative to a central axis of the femur, to maximize contact and increase flexion of the artificial knee joint.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 22, 2009
    Inventor: Steven L. Mandell
  • Publication number: 20090228114
    Abstract: The present invention relates to a femoral prosthesis that includes a cement introduction port which may be used to facilitate delivery or introduction of bone cement into the prosthesis/bone interface after the prosthesis component has been placed on a resurfaced femur bone. The femoral prosthesis may have a keel with undercuts which are configured to assist in controlling the flow of bone cement during implantation and to improve stability of the prosthesis following implantation. The femoral prosthesis is suitable for implantation using arthroscopic, as well as open, surgical procedures. The present prostheses may be used as unicondylar implants in either compartment of the knee or in both compartments of the knee.
    Type: Application
    Filed: February 26, 2009
    Publication date: September 10, 2009
    Inventors: Ron Clark, David Blakemore, Ross Mack
  • Patent number: 7582118
    Abstract: Various embodiments of femoral trochlea prostheses useable in a knee joint. The knee joint includes a patella and a distal femur with a femoral trochlea, or patello-femoral groove. In one embodiment, a femoral trochlea prosthesis includes a distal tail. In another embodiment, a femoral trochlea prosthesis includes a wing or extension portion. In yet another embodiment, a set of femoral trochlea prostheses includes a plurality of prostheses having differing thicknesses. In still another embodiment, a femoral trochlea prosthesis includes a porous medium on various portions of the prosthesis.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: September 1, 2009
    Assignee: Zimmer Technology, Inc.
    Inventors: Jeffrey D. Brown, Adam M. Griner, Robert A. Hodorek, Raymond C. Parisi, Brian E. Vanskyock, Justin J. May, James C. Harris
  • Patent number: 7575603
    Abstract: An intramedullary stem that provides enhanced distal fixation and flexibility and methods for implanting the stem. Certain embodiments of the stem have primary and secondary flutes (or ridges or wedges). Other embodiments have transitional regions.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: August 18, 2009
    Assignee: Smith & Nephew, Inc.
    Inventors: Alisha Bergin, David C. Kelman, Richard D. Lambert
  • Publication number: 20090157189
    Abstract: The present teachings provide a modular articulating cement spacer mold for forming a temporary implant. The modular spacer mold includes a head component mold defining a first opening, a head connector positioned within the first opening of the head component mold, a stem component mold defining a second opening, and a stem connector to fit within the second opening of the stem component mold to mateably engage the head connector. Related kits and methods of forming a temporary implant are provided.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 18, 2009
    Applicant: BIOMET MANUFACTURING CORP.
    Inventors: William Hartman, H. Gene Hawkins, Kristen Martin, Jacob Wilson
  • Publication number: 20090149964
    Abstract: A method for preparing at least a first bone for receiving a prosthesis can include positioning an IM member in a bone. A scaffold, skeleton or frame can be located onto the bone at a desired location. An alignment assembly can be coupled to the frame. The alignment assembly can be moved relative to the IM member to position the frame at a desired location relative to the bone. The frame can be fixed to the bone at the desired location. A cavity can be reamed into the bone using at least a portion of the alignment assembly as a guide. The alignment assembly can be removed from the frame. A cutting block can be coupled to the first attachment portion. Cuts can be prepared in the bone using the cutting block as a guide.
    Type: Application
    Filed: October 9, 2008
    Publication date: June 11, 2009
    Applicant: Biomet Manufacturing Corp.
    Inventors: Brian M. May, Duke A. Fox
  • Publication number: 20090088862
    Abstract: An orthopaedic implant includes a knee prosthetic component, adaptor, and stem extension. The adaptor includes a first mounting end and a second mounting end. The first mounting end is coupled to the knee prosthetic component, and the second mounting end is coupled to the stem extension. The first mounting end of the adaptor defines a first axis, and the second mounting end of the adaptor defines a second axis. The first axis is offset from and parallel to the second axis when viewed in a first anatomical plane. Additionally, the first axis and second axis define an angle therebetween when viewed in a second anatomical plane. In some embodiments, the second mounting end may be movable with respect to the first mounting end. In other embodiments, the adaptor may be integral with the stem extension. Additionally, in some embodiments, the adaptor may be embodied as multi-piece adaptor.
    Type: Application
    Filed: September 27, 2007
    Publication date: April 2, 2009
    Inventors: Kyle Thomas, Timothy G. Vendrely
  • Publication number: 20090088859
    Abstract: A fixed-bearing prosthesis includes a femoral component having a medial condyle surface and a lateral condyle surface. The knee prosthesis also includes a bearing having a medial bearing surface configured to articulate with the medial condyle surface of the femoral component, and a lateral bearing surface configured to articulate with the lateral condyle surface of the femoral component. A tibial tray is secured to the bearing. The tibial tray has a platform with an elongated stem extending downwardly from a lower surface thereof. A posterior buttress extends along a posterior section of the perimeter of the tray's platform, and an anterior buttress extends along an anterior section of the perimeter of the tray's platform. Differently-sized tibial trays are interchangeable with differently-sized bearings.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventors: Stephen A. Hazebrouck, Daren L. Deffenbaugh, Mark A. Heldreth, Jack T. Bryant, Rusty T. Meier
  • Publication number: 20090069899
    Abstract: A temporary femoral implant system has a porous mold and a femoral component. The system fits at least partially in a femoral cavity. The mold has a wall with an interior surface and an exterior surface forming an interior space for receiving an antibiotic bone cement. The mold allows the antibiotic to diffuse through the wall to the exterior surface. The femoral component has a stem portion received within the mold. A method of using the implant system includes providing an implant system comprising a mold and a femoral component, inserting the mold into the femoral cavity with the exterior surface facing the femoral cavity, inserting the stem portion of a femoral component into the interior space of the mold and filling the interior space of the mold with an antibiotic bone cement.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 12, 2009
    Applicant: Howmedica Osteonics Corp.
    Inventor: Robert W. Klein
  • Publication number: 20090005876
    Abstract: A tibial tray assembly includes a platform having a stem extending downwardly from a bottom surface and a stem extension couple to the an end of the stem. The stem extension is electrically insulated from the stem. The tibial tray assembly also includes a wireless communication device configured to transmit data using the stem extension as an antenna.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventors: Terry L. Dietz, Edward J. Caylor, III
  • Publication number: 20090005875
    Abstract: An orthopaedic prosthesis includes a femoral component configured to be coupled to a surgically-prepared surface of the distal end of a femur and a plate having an aperture defined therein. The plate is configured to be coupled to the femoral component in one of a number of orientations such that the location of the aperture is adjustable based on the orientation of the plate. The orthopaedic prosthesis also includes a stem configured to be coupled to the femoral component via a bolt. The position of the stem relative to the femoral component is adjustable based on the orientation of the plate.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventor: Jeffery L. Koenemann
  • Publication number: 20080312746
    Abstract: Provided is a novel hip replacement implant system that includes a ball assembly having a ball trunion, the ball assembly being configured as a replacement for the head of the femur and capable of being secured by the ball assembly trunion to a calcar implant element that can be securely seated in the calcar bone of the femoral neck, thus maintaining the load transfer function of the calcar bone of the femoral neck. A method of using the device is also provided.
    Type: Application
    Filed: June 15, 2007
    Publication date: December 18, 2008
    Inventor: Anthony S. UNGER
  • Publication number: 20080306603
    Abstract: In order to improve a modular implant part for replacing a part of a natural knee joint with an implant component comprising a shaft extending away from the implant component and a connecting device for connecting the shaft to the implant component such that the shaft is adapted to be fixed to the implant component in a multiplicity of desired positions in a simple manner, it is proposed that the connecting device be formed in such a manner that, in a mounting disposition, the shaft is adapted to be moved into different translatory positions by a translatory movement in a direction transverse or substantially transverse to its longitudinal axis, and that, in an implantation disposition, the shaft is adapted to be fixed immovably to the implant component in one of the different translatory positions. Furthermore, an improved knee joint prosthesis is proposed.
    Type: Application
    Filed: June 3, 2008
    Publication date: December 11, 2008
    Applicant: Aesculap AG
    Inventors: Jan Reich, Uwe Idler
  • Publication number: 20080234830
    Abstract: A prosthesis member or assembly can be implanted in a portion of the anatomy. The prosthesis member, with various portions, defines a selected amount of a sphere to articulate or engage selected portions of the anatomy.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 25, 2008
    Applicant: BIOMET MANUFACTURING CORP.
    Inventors: Troy W. Hershberger, Kurt Schmidt