And A Member Secured To Femoral Bone Patents (Class 623/20.19)
  • Patent number: 10130478
    Abstract: An orthopedic implant comprising: (a) a distal femoral component comprising a first condyle bearing surface having a first profile comprising at least three consecutive arcs of curvature; and (b) a proximal tibial component comprising a first condyle bearing surface having a second profile comprising at least three parallel arcs of curvature.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: November 20, 2018
    Assignee: ZIMMER, INC.
    Inventor: Mohamed Rashwan Mahfouz
  • Patent number: 9808287
    Abstract: A method and system provide and use a patellar implant. The patellar implant includes a superior portion, an inferior portion opposite to the superior portion, and an anterior portion. The superior portion being configured to reside below a patellar tendon and to elevate and/or tilt the patellar tendon. The inferior portion is configured to be seated in proximity to a tibia. The anterior portion is between the superior portion and the inferior portion. The anterior portion is placed in proximity to a patella. In one aspect, the method includes inserting the implant beneath the patellar tendon and between the patella and a position at which the patellar tendon is affixed to the tibia. In this aspect, the method also includes affixing the implant.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: November 7, 2017
    Inventor: Jeffrey Halbrecht
  • Patent number: 9801974
    Abstract: A patellar implant is provided being of a two part construction having a strong base portion 32, 54, 72 and 92 (manufactured from a metal material or other medical grade strong material) with a molder outer material 34, 62, 80 and 100 (manufactured from a polymeric material or other softer, smoother material) at least on one side to provide a smooth friction surface to contact the femoral portion of a patient's knee.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: October 31, 2017
    Assignee: Smith & Nephew, Inc.
    Inventor: Ryan Lloyd Landon
  • Patent number: 9572672
    Abstract: Certain disclosed examples provide methods for strengthening, reinforcing, and/or stimulating repair of residual patella bone to be resurfaced. Also provided in some examples are devices associated with the methods. These methods and devices may be utilized during or following total knee replacement (TKR) or total knee arthroscopy (TKA).
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: February 21, 2017
    Assignee: ZIMMER KNEE CREATIONS, INC.
    Inventor: Peter F. Sharkey
  • Patent number: 9011547
    Abstract: A knee prosthesis system for total knee replacement procedures includes a plurality of distinctly-sized femoral components, a plurality of distinctly-sized fixed tibial components, a plurality of distinctly-sized mobile tibial components, a plurality of fixed inserts, and a plurality of mobile inserts. Each of the mobile inserts is sized and shaped such that each may be optimally matched to one of the femoral components and may be used with any one of the mobile tibial components. Each of the fixed inserts is sized and shaped such that each may be optimally matched to one of the femoral components and may be used with any one of the fixed tibial components.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: April 21, 2015
    Assignee: Depuy (Ireland)
    Inventors: Daniel D. Auger, David P. Fitzpatrick, Joseph G. Wyss, Abraham P. Wright, Christel M. Wagner, Stephen A. Hazebrouck, Daren L. Deffenbaugh
  • Publication number: 20140358241
    Abstract: The present invention concerns to a total knee prosthesis including a femoral implant having an anterior wall that forms the upper portion of a prosthetic trochlea and two curved branches extending from the lower edge of said anterior wall, delimiting the lower portion of the prosthetic trochlea between them and forming condylar surfaces between them. The trochlea has a middle furrow bordered by two rounded convex surfaces. The trochlea has in its upper portion a flexion of approximately 50°. The trochlea has a depth smaller than the height of the longitudinal middle rib comprised by the patella and has a width larger than that of that same rib, such that the patella comes into contact with the femoral implant essentially by that rib and said concave side faces are situated at a distance from said rounded convex surfaces.
    Type: Application
    Filed: June 4, 2013
    Publication date: December 4, 2014
    Inventor: Jacques AFRIAT
  • Patent number: 8871131
    Abstract: Provided are processes comprising crosslinking polyethylene or using crosslinked polyethylene. Furthermore, the processes may include compacting and/or sintering the polyethylene. The polyethylene can comprise virgin ultrahigh molecular weight polyethylene having a weight average molecular weight of at least 1,000,000 g/mol, to provide a compacted composition comprising virgin ultrahigh molecular weight polyethylene.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: October 28, 2014
    Assignee: Smith and Nephew Orthopaedics AG
    Inventors: Hans Schmotzer, Yvo Dirix, Paul Smith, Theo Tervoort, Lorenz Brunner
  • Publication number: 20140277444
    Abstract: Implant apparatus and methods directed toward treating conditions involving the knee joint and the patella specifically are disclosed. Implants that maintain alignment or address misalignment of a patella through a full range of motion of the knee joint are disclosed.
    Type: Application
    Filed: March 7, 2014
    Publication date: September 18, 2014
    Applicant: MOXIMED, INC.
    Inventors: Anton G. Clifford, Josef L. Friedmann, Michael E. Landry, David Lowe, Mary O'Connell, Heber Saravia
  • Patent number: 8562616
    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: Grant
    Filed: October 9, 2008
    Date of Patent: October 22, 2013
    Assignee: Biomet Manufacturing, LLC
    Inventors: Brian M. May, Duke A. Fox
  • Patent number: 8562688
    Abstract: A knee joint prosthesis for implantation to replace a portion of a knee joint. The knee joint prosthesis includes a tibial tray and a bearing member that engages the tibial tray. The prosthesis also includes an insert with a base that is fixed to the bearing member and an extension portion that extends away from the bearing member and the tibial tray. The extension portion has an axis, and the extension portion includes a threaded portion. The prosthesis further includes a post that is rotatably coupled to the extension portion, and the post is rotatable about the axis of the extension portion relative to the insert. Furthermore, the prosthesis includes a retention member that threadably couples to the threaded portion of the insert to limit movement of the post along the axis away from the bearing member and the tibial tray.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: October 22, 2013
    Assignee: Biomet Manufacturing, LLC
    Inventor: Nathan E. Belcher
  • Patent number: 8529631
    Abstract: The invention relates to a base component for a tibial implant, comprising a lateral compartment (14), a medial compartment (12) and an anterior connection portion (16) which connects the lateral compartment (14) and the medial compartment (12) to one another at anterior. A portion (18) open to posterior is provided between the lateral compartment (14) and the medial compartment (12). The lateral component (14) and the medial component (12) each have a lower side and an upper side, with at least one of the lower sides being configured for the fastening of the base component to the tibia. A marginal web (22, 22?) is formed at at least one of the compartments (12, 14), starting from the upper side, said marginal web forming a receiving shell for a meniscus component (30, 32) of the tibial implant together with the upper side of the compartment.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: September 10, 2013
    Assignee: Zimmer, GmbH
    Inventors: Cosimo Donno, Roger Scherrer
  • Publication number: 20130173008
    Abstract: A femoral prosthetic component comprises a pair of condyles having an intercondylar notch interposed substantially therebetween. Each of the pair of condyles comprises an edge that borders the intercondylar notch. At least one of the pair of condyles comprises a condylar notch disposed within the respective edge of the at least one of the pair of condyles.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 4, 2013
    Inventors: Kevin Bechtold, Ali Zafar Abbasi, Amit Mistry, Mark Ellsworth Nadzadi, Jason Karl Otto
  • Patent number: 8475535
    Abstract: A prosthetic device for forming at least a portion of a joint may have a plurality of segmented components fixed relative to a femur of a body including: a patellofemoral component and a condyle component. Each segmented component may be configured such that a placement at which the segmented component will be fixed relative to the femur is not constrained by a connection to another of the segmented components that is fixed relative to the femur. In an installed configuration, the patellofemoral and condyle components may be fixed relative to the femur such that: a gap is provided between an edge of the patellofemoral component and an opposing edge of the condyle component, and a transition region is provided that extends from a first femoral coronal plane that intersects the patellofemoral component to a second femoral coronal plane that intersects the condyle component.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: July 2, 2013
    Assignee: MAKO Surgical Corp.
    Inventor: Jason Karl Otto
  • Patent number: 8419741
    Abstract: A replacement device for resurfacing a joint surface of a femur and a method of making and installing such a device is provided. The custom replacement device is designed to substantially fit the trochlear groove surface, of an individual femur, thereby creating a “customized” replacement device for that individual femur and maintaining the original kinematics of the joint. The top surface is designed so as to maintain centrally directed tracking of the patella perpendicular to the plane established by the distal end of the femoral condyles and aligned with the center of the femoral head.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: April 16, 2013
    Assignee: Kinamed, Inc.
    Inventors: Roger Carignan, Clyde R. Pratt
  • Publication number: 20120330429
    Abstract: A prosthetic implant useful in a cementless application is disclosed. The implant may include a curved bone facing surface and one or more pegs or keels. Preferably, the implant is implanted on a bone surface that has been prepared so as to allow for a snap fit between the implant and the bone.
    Type: Application
    Filed: June 22, 2012
    Publication date: December 27, 2012
    Applicant: STRYKER CORPORATION
    Inventors: Stuart L. Axelson, JR., Michael C. Ferko, Peter John Wellings
  • Patent number: 8292964
    Abstract: An artificial knee joint that includes a femoral component with a specially shaped bearing surface and a tibial component, whose surface interacts with the femoral surfaces. The interaction provides for the motion and stability characteristics of the anatomic knee. The interaction between the femoral and tibial surfaces is such that as the knee is flexed to maximum, the femoral component moves posteriorly on the tibial surface, more so on the lateral side than on the medial side. This is accomplished by the interaction of a projecting tibial post inside a cupola in the center of the femoral component, and by the saggital radius on the medial side being smaller than that on the lateral side. The prevention of anterior sliding of the femur on the tibia in early flexion is accomplished by the interaction between a distal-anterior recess on the medial side of the femur and an apposing raised pad on the tibial surface.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: October 23, 2012
    Assignee: New York University
    Inventor: Peter Stanley Walker
  • Publication number: 20120209393
    Abstract: A prosthetic patellar implant has a posterior articulation surface and an anterior attachment surface. The anterior attachment surface has a medial attachment surface and a lateral attachment surface. The medial and lateral attachment surfaces can be planar and angled relative to one another, meeting at a common intersection medially offset from the sagittal centerline of the implant. The medial and lateral attachment surfaces can include convexities. The anterior attachment surface can have one or more pegs and/or recesses.
    Type: Application
    Filed: February 6, 2012
    Publication date: August 16, 2012
    Applicants: MEDICINELODGE, INC. DBA IMDS CO-INNOVATION
    Inventors: Michael Ries, Nicholas Slater, Joshua A. Butters, Jordan Hoof, Bjorn Rindal
  • Patent number: 8142509
    Abstract: Embodiments of the present invention provide patellar component designs that are optimally shaped to help reduce shear force and accommodate slight implantation error. Further, they help lessen anterior knee pain, particularly during deep-flexion activities and help ease the transition during the range of knee movement in a controlled way.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: March 27, 2012
    Assignee: Smith & Nephew, Inc.
    Inventors: Brian W. McKinnon, Jason K. Otto
  • Patent number: 8128704
    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 nonarticulating surface including contoured surfaces and/or planar surfaces. The present disclosure also provides a method for preparing a bone surface for receiving the prostheses described herein.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: March 6, 2012
    Assignee: Zimmer, Inc.
    Inventors: Jeffrey D. Brown, Adam M. Griner, Robert A. Hodorek, Raymond C. Parisi, Brian E. Vanskyock, Toby N. Farling
  • Patent number: 8008365
    Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: August 30, 2011
    Assignee: Orthopaedic Hospital
    Inventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
  • Patent number: 8003709
    Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: August 23, 2011
    Assignee: Orthopaedic Hospital
    Inventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
  • Patent number: 7878989
    Abstract: A total knee prosthesis comprises a femoral component and a patellar component. The femoral component has a patellar flange into which is built a twist or roller coaster configuration. The patellar component has an off-set dome with respective lateral and medial facets. The configuration of the patellar flange resists forces from a medial to a lateral direction, whilst the lateral and medial facets of the patellar component are respectively shaped to allow area contact and line contact respectively with the femoral component. Also disclosed is a device for intra-operative checking of patellar tracking to allow correct insertion of the femoral and patellar components.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: February 1, 2011
    Inventor: Derek James Wallace McMinn
  • Publication number: 20100198354
    Abstract: A method and system provide and use a patellar implant. The patellar implant includes a superior portion, an inferior portion opposite to the superior portion, and an anterior portion. The superior portion being configured to reside below a patellar tendon and to elevate and/or tilt the patellar tendon. The inferior portion is configured to be seated in proximity to a tibia. The anterior portion is between the superior portion and the inferior portion. The anterior portion is placed in proximity to a patella. In one aspect, the method includes inserting the implant beneath the patellar tendon and between the patella and a position at which the patellar tendon is affixed to the tibia. In this aspect, the method also includes affixing the implant.
    Type: Application
    Filed: July 30, 2008
    Publication date: August 5, 2010
    Inventor: Jeffrey Halbrecht
  • Publication number: 20090326662
    Abstract: An orthopaedic implant includes a patella component having a posterior bearing surface configured to articulate with the femoral condyles of a femur, and an anterior surface having a number of pegs extending outwardly therefrom. The superior edge of the patella component is thickened relative to conventional dome-shaped patella components.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Wayne M. Goldstein, Abraham P. Wright
  • Publication number: 20090326661
    Abstract: An orthopaedic implant includes a patella component having a posterior bearing surface configured to articulate with the femoral condyles of a femur, and an anterior surface having a number of pegs extending outwardly therefrom. The superior edge of the patella component is thickened relative to conventional dome-shaped patella components.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Inventors: Abraham P. Wright, Wayne M. Goldstein
  • Patent number: 7615054
    Abstract: An improved method of performing surgery on a joint in a patient's body, such as a knee, includes making an incision in a knee portion of one leg while a lower portion of the one leg is extending downward from an upper portion of the one leg and while a foot connected with the lower portion of the one leg is below a support surface on which the patient is disposed. The incision is relatively short, for example, between seven and thirteen centimeters. A patella may be offset from its normal position with an inner side of the patella facing inward during cutting of a bone with a cutting tool. During cutting of the bone, one or more guide members having opposite ends which are spaced apart by a distance less than the width of an implant may be utilized to guide movement of a cutting tool.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: November 10, 2009
    Assignee: Martec, LLC
    Inventor: Peter M. Bonutti
  • Publication number: 20090248167
    Abstract: A patello-femoral prosthesis is provided for replacing the engagement surfaces between the patella and the femur. The prosthesis is configured to cover the trochlear groove and extend into the intercondylar notch without extending onto the articulating surfaces of the condyles. A method is also provided for implanting a patello-femoral prosthesis in which a portion of the trochlear groove and intercondylar notch are resected and the prosthesis is implanted over the femur that had portions resected.
    Type: Application
    Filed: June 8, 2009
    Publication date: October 1, 2009
    Inventor: Paul A Lotke
  • Publication number: 20090228111
    Abstract: A prosthetic device for forming at least a portion of a joint may have a plurality of segmented components fixed relative to a femur of a body including: a patellofemoral component and a condyle component. Each segmented component may be configured such that a placement at which the segmented component will be fixed relative to the femur is not constrained by a connection to another of the segmented components that is fixed relative to the femur. In an installed configuration, the patellofemoral and condyle components may be fixed relative to the femur such that: a gap is provided between an edge of the patellofemoral component and an opposing edge of the condyle component, and a transition region is provided that extends from a first femoral coronal plane that intersects the patellofemoral component to a second femoral coronal plane that intersects the condyle component.
    Type: Application
    Filed: March 4, 2009
    Publication date: September 10, 2009
    Inventor: Jason Karl OTTO
  • Patent number: 7544209
    Abstract: A patello-femoral prosthesis is provided for replacing the engagement surfaces between the patella and the femur. The prosthesis is configured to cover the trochlear groove and extend into the intercondylar notch without extending onto the articulating surfaces of the condyles. A method is also provided for implanting a patello-femoral prosthesis in which a portion of the trochlear groove and intercondylar notch are resected and the prosthesis is implanted over the femur that had portions resected.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: June 9, 2009
    Inventor: Paul A. Lotke
  • 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: 20090036993
    Abstract: A patellar implant for a knee joint prosthesis including a femoral component and a tibial assembly having a post. The patellar implant includes an anterior anchoring surface, and a posterior surface articulating with the femoral component. The posterior surface has an articulating portion and a non-articulating portion, and the non-articulating portion defines a depression that substantially prevents impingement of the patellar implant on the post during flexion.
    Type: Application
    Filed: April 22, 2004
    Publication date: February 5, 2009
    Inventor: Robert Metzger
  • Publication number: 20080300689
    Abstract: Embodiments of the present invention provide patellar component designs that are optimally shaped to help reduce shear force and accommodate slight implantation error. Further, they help lessen anterior knee pain, particularly during deep-flexion activities and help ease the transition during the range of knee movement in a controlled way.
    Type: Application
    Filed: January 23, 2007
    Publication date: December 4, 2008
    Inventors: Brian W. Mc Kinnon, Jason K. Otto
  • Patent number: 7429346
    Abstract: An orthopedic implant device and method is disclosed. Specifically, a knee mold system is disclosed, including elastic tibial and femoral molds, each of which may be configured and dimensioned as a unitary mold for in situ placement during a surgical procedure. Each mold may be manufactured from an elastic material that may be disposable. The tibial mold may further comprise a sidewall forming a cavity, markings for relative depth measurement, and depth rings for use as a guide for scoring, cutting, and/or trimming and tearing away an excess portion of the tibial mold. The femoral mold may further comprise a sidewall defining a cavity, two legs extending from a body of the femoral mold for forming the artificial condyles, and an eyelet for aiding in placement and removal of the femoral mold. The resulting prosthetic tibial and femoral components may form an articulation surface that mimics, at least in part, the natural articulation surface of the knee.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: September 30, 2008
    Assignee: Ortho Development Corporation
    Inventors: Michael D. Ensign, Matthew M. Lowe, E. Marc Mariani, Michael H. Bourne
  • Publication number: 20080119938
    Abstract: There are provided a knee joint prosthesis for a bi-compartmental knee replacement and surgical devices thereof, wherein the knee joint prosthesis for the bi-compartmental knee replacement, which is performed on a patient with degenerative arthritis at any one of an inside compartment and an outside compartment of the knee and between the femur and the patella, is configured to position a femoral component at the inside or outside of the femur of the patient, to position a tibial component at the inside or outside of the tibia, and to properly position a tibial bearing member between the femoral component and the tibial component, thereby having the effects of improving the range of sense and motion after surgery by preserving other normal joints and reducing blood loss compared to a conventional prosthesis; improving the accuracy of the surgery to prevent the malalignment of the prosthesis, reduce the shaking of the prosthesis and extend the use life of the prosthesis; significantly improving a securing forc
    Type: Application
    Filed: May 31, 2007
    Publication date: May 22, 2008
    Inventor: Sang Soo Oh
  • Publication number: 20070219639
    Abstract: A prosthetic device includes one or more components configured to be disposed in a joint. The component includes at least one feature configured to provide information about the component. The information can be used to determine or create the relationship between the component and the joint and/or other components. This relationship may be used to evaluate and/or modify the expected performance of the prosthetic device and assist in determining the optimal relationship between one or more components and a patient's anatomy.
    Type: Application
    Filed: December 28, 2006
    Publication date: September 20, 2007
    Inventors: Jason K. Otto, Binyamin Hajaj, Rony Abovitz, Amit Mistry, Scott Nortman, Steven B. Brown
  • Patent number: 7258701
    Abstract: A knee replacement system provides a knee implant that may be used to more accurately replicate the diameter of a natural knee. In one embodiment, a patellofemoral component is connected to the posterior portion of a condylar component by screws that pass through the femur allowing the patellofemoral component and the condylar component to be torqued against opposing sides of the femur. Two additional screws are used to connect the patellofemoral component to an anterior portion of the condylar component. A gap may be left between the patellofemoral component and the anterior portion of the condylar component if needed to provide precise replication of the diameter of the natural knee from the patellofemoral component to the condylar component.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: August 21, 2007
    Assignee: DePuy Products, Inc.
    Inventors: Luke J. Aram, Daniel D. Auger, Adam I. Hayden, Jordan S. Lee
  • Patent number: 6916341
    Abstract: Disclosed is a device and method of bicompartmental arthroplasty of the knee. The device permits arthroplasty of the medial or lateral and patellofemoral compartments of the knee while leaving the opposite compartments and the anterior and posterior cruciate ligaments intact. The device provides a femoral prosthesis component that includes a trochlear surface and a tibial prosthesis component which can be secured to the tibia. The femoral component is essentially “u” shaped having an anterior leg upon which the trochlear surface is positioned and a posterior leg which engages the posterior surface of the distal end of the femur. The femoral component also has a convex articulating surface which engages a concave articulating surface of the tibial prosthesis component to approximate the articulation of a healthy knee.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: July 12, 2005
    Inventor: Lindsey R. Rolston
  • Publication number: 20040204760
    Abstract: Disclosed herein are methods and devices for repairing articular surfaces in a knee joint. The articular surface repairs are customizable or highly selectable for each patient and geared toward providing optimal fit and function. Kits are also provided to enable customized repairs to be performed.
    Type: Application
    Filed: January 5, 2004
    Publication date: October 14, 2004
    Applicant: Imaging Therapeutics, Inc.
    Inventors: Wolfgang Fitz, Philipp Lang, Daniel Steines, Konstantinos Tsougarakis, Rene Vargas-Voracek, Hacene Bouadi, Cecily Anne Snyder
  • Patent number: 6800670
    Abstract: The present invention discloses methods for enhancing the wear-resistance of polymers, the resulting polymers, and in vivo implants made from such polymers. One aspect of this invention presents a method whereby a polymer is irradiated, preferably with gamma radiation, then thermally treated, such as by remelting of annealing. The resulting polymeric composition preferably has its most oxidized surface layer removed. Another aspect of the invention presents a general method for optimizing the wear resistance and desirable physical and/or chemical properties of a polymer by crosslinking and thermally treating it. The resulting polymeric compositions is wear-resistant and may be fabricated into an in vivo implant.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: October 5, 2004
    Assignees: Orthopaedic Hospital, University of Southern California
    Inventors: Fu-Wen Shen, Harry A. McKellop, Ronald Salovey
  • Publication number: 20040098133
    Abstract: A replacement device for resurfacing a joint surface of a femur and a method of making and installing such a 5 device is provided. The custom replacement device is designed to substantially fit the trochlear groove surface, of an individual femur. Thereby creating a “customized” replacement device for that individual femur and maintaining the original kinematics of the joint. The replacement device may be defined by four boundary points, and a first and a second surface. The first of four points is 3 to 5 mm from the point of attachment of the anterior cruciate ligament to the femur. The second point is near the bottom edge of the end of the natural articulatar cartilage. The third point is at the top ridge of the right condyle and the fourth point at the top ridge of the left condyle of the femur.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 20, 2004
    Inventors: Roger Carignan, Clyde R. Pratt
  • Publication number: 20030181984
    Abstract: A patello-femoral joint prosthesis is provided which allows smooth tracking of the articulating surfaces through a full range of joint motion. A novel configuration of a femoral implant component that facilitates superior adhesion to bone is also provided. Also provided is a patello-femoral joint replacement system, which permits precise, reproducible bone preparation techniques that uniquely permit later revision and full knee joint replacement procedures with minimal complications. Also provided are a drill guide and a cutting guide, each being configured to provide three point stabilization during operation.
    Type: Application
    Filed: February 14, 2003
    Publication date: September 25, 2003
    Inventor: Walter F. Abendschein
  • Patent number: 6589283
    Abstract: The invention relates to a knee joint prosthesis system adapted to replace the articulating knee portion of a femur and a tibia. The knee joint prosthesis system includes a first femoral component and a second femoral component. The first femoral component includes a first femoral engagement region and a first condylar portion having a first femoral bearing surface. The first femoral engagement region is operable to engage a resecting engagement surface of the femur and the first condylar portion includes a first posterior region having a first thickness. The second femoral component includes a second femoral engagement region and a second condylar portion having a second femoral bearing surface. The second femoral engagement region is operable to engage the resected engagement surface of the femur and the second condylar portion includes a second posterior region having a second thickness.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: July 8, 2003
    Assignee: Biomet, Inc.
    Inventors: Robert Metzger, Troy Hershberger
  • Publication number: 20030120346
    Abstract: A prosthetic patellar component includes a base and a bearing element that includes first and second femoral engaging surfaces disposed between first and second (superior/inferior) edge surfaces The edge surfaces are curved to provide a gradual transition from a posterior facing portion to a nearly vertical superior or inferior facing portion. Moreover, the inferior-superior dimension of the component is at least approximately 90% of the medial-lateral dimension. The relative height and gradually transitioning edges significantly reduce the likelihood of sudden posterior rotation during deep flexion movement. The edge surfaces extend from a substantially posterior facing portion proximate to the first and second femoral engaging surfaces and a substantially vertical facing portion proximate the base.
    Type: Application
    Filed: August 6, 2002
    Publication date: June 26, 2003
    Inventors: James Mercinek, Mark B. Lester, Alan C. Merchant
  • Publication number: 20030033018
    Abstract: A prosthetic patellar component includes a base and a bearing element. The base is operable to be affixed to an outer patellar surface. The bearing element includes first and second femoral engaging surfaces disposed between first and second edge surfaces and separated by a convex peak. The first and second edge surfaces include a gradual, or rounded, transition from a nearly posterior facing portion to a nearly superior or inferior facing portion, with adjacent surface portions having a relative angular displacement of less than about 30 degrees. The inferior-superior dimension is at least approximately 90% of the or medial-lateral dimension. The additional relative height and the gradually transitioning edges significantly reduce the likelihood of sudden posterior rotation during deep flexion movement. The patellar component may be employed in a PFJ system that engages a prosthetic femur implant that includes a trochlear groove.
    Type: Application
    Filed: August 6, 2002
    Publication date: February 13, 2003
    Inventor: Alan C. Merchant