Including Lateral And Medial Condyles Patents (Class 623/20.31)
  • Patent number: 10631989
    Abstract: The present invention relates to a partial joint replacement (1000), encompassing a shell-like segment (100) with a concave inner contour (3) for the arrangement on at the bone structure of a patient, wherein the segment (100) comprises a lateral section (5) and a medial section (7) along a longitudinal direction (x), and wherein the outer contour (1) of the segment (100) comprise in longitudinal direction (x) at least one inflection point (9).
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: April 28, 2020
    Assignee: OT MEDIZINTECHNIK GMBH
    Inventors: Andreas Lenich, Ulrich Schreiber
  • Patent number: 10582934
    Abstract: Disclosed herein is a method of creating a customized arthroplasty jig. The method may include: generating two-dimensional MRI images of a patient's joint area to undergo arthroplasty; electronically orienting the two dimensional MRI image slices to account for the patient's joint area being randomly physically oriented in a scanning area of a MRI machine; generating a three-dimensional bone image of at least a portion of a bone of the patient's joint area from the generated two-dimensional MRI images; using the three-dimensional bone image to generate data pertaining to the customized arthroplasty jig, wherein the data includes bone surface information; providing the data to at least one manufacturing device; and employing the bone surface information to cause the at least one manufacturing device to create a surface on the arthroplasty jig configured to matingly receive a surface of the bone.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: March 10, 2020
    Assignee: Howmedica Osteonics Corporation
    Inventors: Ilwhan Park, Stephen M. Howell
  • Patent number: 10470889
    Abstract: An orthopedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and/or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: November 12, 2019
    Assignee: Zimmer, Inc.
    Inventors: Mary S. S. Wentorf, Jeffrey E. Bischoff, Raymond C. Parisi, Katherine M. Rettig
  • Patent number: 10413414
    Abstract: A total knee replacement, comprising a femoral and a tibial component in articulating contact that can restore normal joint function. The articulation between the two components is controlled by four guide surfaces.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: September 17, 2019
    Assignee: NEW YORK UNIVERSITY
    Inventor: Peter Stanley Walker
  • Patent number: 10322004
    Abstract: A prosthetic femoral component (10) for an orthopaedic prosthesis has a canted patellar groove adapted for optimal patella/component interaction, with the component configured to have a medial or lateral cant depending upon the method of implantation. The femoral component defines a distal “component transverse plane,” which is a plane tangent to the distal-most points of the component condyles (12, 14). In a “mechanical” implantation, the component transverse plane is substantially normal to the mechanical femoral axis of the femur after the component has been implanted. Where the femoral component is configured to be “mechanically oriented” in this manner, the component has a medially canted patellar groove. On the other hand, an “anatomic” implantation is one in which, after the component has been implanted, the component transverse plane is substantially parallel to an “anatomic” transverse plane.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: June 18, 2019
    Assignee: ZIMMER GMBH
    Inventors: Cosimo Donno, Adam D. Henderson
  • Patent number: 10307256
    Abstract: A knee replacement system, and a method for supplying and implanting a knee replacement system, for enabling natural knee movement in a leg in a patient, including: a medial femoral component having a medial femoral articulating surface with a sagittal plane profile including four medial femoral arcuate portions scaled by a first femoral scaling factor; a lateral femoral component having a lateral femoral articulating surface with a sagittal plane profile including four lateral femoral arcuate portions scaled by a second femoral scaling factor; a medial tibial component having a medial tibial articulating surface that articulates with the medial femoral articulating surface and includes a first raised medial edge that increases in width in an anterior direction; and a lateral tibial component having a lateral tibial articulating surface that articulates with the lateral femoral articulating surface and includes a second raised medial edge that increases in width in the anterior direction.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: June 4, 2019
    Assignee: Biomet Manufacturing, LLC
    Inventors: Thomas P. Andriacchi, Jorge O. Galante
  • Patent number: 10292826
    Abstract: A knee prosthesis comprising a femur component defining a ball-like femoral condyle and a tibia component defining a cavity on its medial side corresponding to the ball-like condyle. The knee prosthesis enables pivoting of the tibia component about the medial side of the femur component as a function of the flexion angle ? as long as there is joint compression applied to the knee prosthesis as exemplified by muscle forces, weight, and ligament tensions, to enforce contact between the tibia component and the femur component. The geometries of the spherical load bearing surfaces of the medial tibia condyle and medial femur condyle provide the kinematic degrees of freedom and the geometric constraints required for proper guiding of the rolling and sliding surfaces of the femoral component and tibial component during articulation of the present knee prosthesis.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: May 21, 2019
    Assignee: Orthopedic Innovation Centre Inc.
    Inventors: Urs Wyss, Shahram Amiri, Theodore Derek Vernon Cooke
  • Patent number: 10201429
    Abstract: In an artificial knee joint implant, an increase in constraint force of a femur component and a tibia component in the anterior-posterior direction and the left-right direction of a patient is enabled, and an increase in an allowable degree of medial pivot motion is enabled. An artificial knee joint implant has a femur component to be fixed to a distal portion of a femur of a patient, and a tibia component to be fixed to a proximal portion of a tibia of the patient. Femur sliding faces of the femur component and tibia sliding faces of the tibia component each include a region in which the curvature radius varies in a predetermined direction.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: February 12, 2019
    Assignee: Kyocera Corporation
    Inventors: Yuichi Enomoto, Masahiko Hashida
  • Patent number: 10045849
    Abstract: A prosthetic total knee replacement system comprises a distal femoral implant component, a tibial tray implant component and a fixed bearing tibial tray insert. The fixed bearing tibial tray insert is fixed to the tibial tray and articulates with the distal femoral implant component. The fixed bearing tibial tray insert component has a medial-lateral centerline and a stabilizing post. The stabilizing post has a medial-lateral centerline offset laterally from the medial-lateral centerline of the fixed bearing tibial tray insert.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: August 14, 2018
    Assignee: DEPUY IRELAND UNLIMITED COMPANY
    Inventor: Richard D Komistek
  • Patent number: 9956080
    Abstract: The disclosure provides a joint replacement coupling comprising joint members with opposing joint surfaces, wherein one of the members has a magnetic portion therein which comprises an array of magnets, and the other of the members has a conduction portion therein that comprises a conductive surface. The magnets are arranged to produce a magnetic field that contacts the conduction portion. The conduction portion is optionally positioned so that at least a portion of the conductive surface contacts the magnetic field so that relative motion between the opposing joint surfaces induces current loops in the conductive surface and produces a repulsive force against the magnetic portion, thereby reducing friction between the joint surfaces, optionally separating the joint surfaces.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: May 1, 2018
    Inventor: Jason Howard
  • Patent number: 9861490
    Abstract: An orthopedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and/or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: January 9, 2018
    Assignee: Zimmer, Inc.
    Inventors: Mary S. S. Wentorf, Jeffrey E. Bischoff, Raymond C. Parisi, Katherine M. Rettig
  • Patent number: 9795489
    Abstract: A knee replacement system for enabling natural knee movement in a leg comprising a prosthetic is provided. The prosthetic includes a tibial portion at least partially implantable on a resected surface of a tibia; a plate portion attached to the tibial portion and at least partially implantable in a meniscal space; wherein the plate portion comprises a top surface having a medial recess and a lateral recess and a bottom surface attached to a top surface of the tibial portion wherein the tibial portion and the plate portion are one piece, wherein a medial side surface, a lateral side surface, a posterior side surface and an anterior side surface are attached to at least a portion of the top surface and at least a portion of the bottom surface and defining a medial side edge, a lateral side edge, a posterior side edge and an anterior side edge respectively, where in at least a portion of one of the medial side edge, lateral side edge, posterior side edge, and anterior side edge is oblique.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: October 24, 2017
    Assignee: L&K BIOMED CO., LTD
    Inventor: Krishnachandra Chandrashanker Mehta
  • Patent number: 9750613
    Abstract: The present invention relates to a stabilized ankle prosthesis configured for use in patients with compromised soft tissue in the ankle. The prosthesis of the present invention is a two-component design comprising a stabilizing lip configured to constrain movement in the general direction of compromised soft tissue.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: September 5, 2017
    Assignee: Wright Medical Technology, Inc.
    Inventor: Christine M. Petteys
  • Patent number: 9707085
    Abstract: Methods and devices are provided for knee joint replacement with anterior cruciate ligament (ACL) substitution. Generally, the methods and devices can allow a knee joint to be partially or totally replaced in conjunction with substitution of the knee joint's ACL. In one embodiment, a knee replacement prosthesis can include a medial or lateral femoral implant, a femoral intercondylar notch structure, a medial or lateral tibial insert, and an ACL-substitution member. The ACL-substitution member can be configured to engage with the femoral intercondylar notch structure during a full range of knee motion and/or during only early knee flexion.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: July 18, 2017
    Assignee: The General Hospital Corporation
    Inventors: Orhun K. Muratoglu, Kartik Mangudi Varadarajan, Guoan Li, Harry E. Rubash, Thomas Zumbrunn
  • Patent number: 9707087
    Abstract: Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: July 18, 2017
    Assignee: Smith & Nephew, Inc.
    Inventors: Jason K. Otto, Brian William McKinnon, Michael Dean Hughes, Michael D. Ries, Jan Victor, Johan Bellemans, Johnathan Garino, Timothy Wilton
  • Patent number: 9668871
    Abstract: A tibial prosthesis comprises a medial base portion configured to engage a medial surface of a tibia and a lateral base portion configured to engage a lateral surface of the tibia. At least a portion of the medial and lateral base portions are separated by a passage interposed therebetween. The tibial prosthesis also comprises a bridge coupling the medial base portion and the lateral base portion, wherein at least a portion of the bridge is elevated above a portion of the passage between the medial base portion and the lateral base portion. The bridge may define an underlying area that receives at least a portion of a tibial eminence when the tibial prosthesis is engaged with the tibia, wherein the height of the bridge varies in a superior direction across the passage.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: June 6, 2017
    Assignee: Mako Surgical Corp.
    Inventors: Ronald R. Irwin, Jason Karl Otto, Ali Zafar Abbasi, Mark Ellsworth Nadzadi
  • Patent number: 9662217
    Abstract: A knee prosthesis has a femoral component with a medial condyle defining a constant bearing spacing relative to a central sagittal component plane SP, and a lateral condyle defining divergent bearing spacing from the central sagittal component plane along an extension-to-flexion path. High congruence between the medial articulation surfaces creates a pivot point for external rotation at the medial contact area, while lower congruence in the lateral articulation surfaces allows the lateral femoral condyle to track anteriorly and posteriorly during flexion. The amount of lateral condyle bearing spacing divergence is calculated to produce a substantially linear anteroposterior motion profile of the lateral femoral condyle upon the lateral tibia articular surface throughout a wide range of flexion.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: May 30, 2017
    Assignee: Zimmer GmbH
    Inventors: Marco A. H. Heggendorn, Matthias Schäpper, Roger Scherrer
  • Patent number: 9452052
    Abstract: An artificial knee joint (1) is described and comprises a femoral component (10) and a tibial component (30), for attachment to the femur (2) and tibia (3) of a patient (4) respectively. The femoral component (10) comprises a lateral condyle (11) and a medial condyle (12) which extend from the posterior (13) to the anterior (14) of the femoral component (10). A femoral gap (15) is provided between the lateral (11) and medial (12) condyles extending from the posterior (13) toward the anterior (14) of the femoral component (10). The lateral (11) and medial (12) condyles are joined at the anterior (13) of the femoral component (10) to form a patella tracking path or bearing surface (16) which is located at and forms the anterior end of the gap (17). A femoral cam (18) is provided bridging the posterior ends of both the lateral (11) and medial (12) condyles, and forms a posterior end of the gap (19), wherein the femoral cam (18) is structured to have the shape of a section of a ring (20).
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: September 27, 2016
    Assignee: Smith and Nephew Orthopaedics AG
    Inventors: Gaser El Zoghbi, Ulrich Reinbold
  • Patent number: 9427323
    Abstract: A knee prosthesis comprises a femoral component for securement to a femur, the femoral component defining medial and lateral condyles and an intercondylar groove; and a tibial component for securement to a tibia, the tibial component having respective bearing surfaces shaped to engage with said condyles both when the knee, in use, is extended and also over a range of flexion. At least one of the condyles is part-helical in shape and the respective bearing surface of the tibial component is correspondingly part-helical in at least a medio-lateral direction. In addition, the other bearing surface is incongruent with the other condyle in at least the antero-posterior direction so as to allow for antero-posterior movement of the femoral component relative to the bearing surfaces of the tibial component.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: August 30, 2016
    Inventor: Derek J. W. McMinn
  • Patent number: 9402729
    Abstract: Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: August 2, 2016
    Assignees: SMITH & NEPHEW, INC., THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA
    Inventors: Jason K. Otto, Brian William McKinnon, Michael Dean Hughes, Michael D. Ries, Jan Victor, Johan Bellemans, Jonathan Garino, Timothy Wilton
  • Patent number: 9393032
    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 23, 2015
    Date of Patent: July 19, 2016
    Assignee: KINAMED, INC.
    Inventors: Roger Carignan, Clyde R. Pratt
  • Patent number: 9320605
    Abstract: Knee prostheses featuring components that more faithfully replicate the structure and function of the human knee joint in order to provide, among other benefits: greater flexion of the knee in a more natural way by promoting or at least accommodating internal tibial rotation in a controlled way, replication of the natural screw home mechanism, and controlled articulation of the tibia and femur respective to each other in a more natural way. In a preferred embodiment, such prostheses include an insert component disposed between a femoral component and a tibial component, the insert component preferably featuring among other things a reversely contoured posterolateral bearing surface that helps impart internal rotation to the tibia as the knee flexes.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: April 26, 2016
    Assignees: Smith & Nephew, Inc., The Trustees of the University of Pennsylvania
    Inventors: Jason K. Otto, Brian William McKinnon, Michael Dean Hughes, Michael D. Ries, Jan Victor, Johan Bellemans, Jonathan Garino, Timothy Wilton
  • Patent number: 9320616
    Abstract: Systems and methods for providing deeper knee flexion capabilities. In some instances, such systems and methods include an asymmetrical femoral component that includes a femoral prosthesis that is configured to attach to a distal portion of a femur. In some such instances, the prosthesis includes a medial condyle and a lateral condyle, wherein a medial-lateral width of an articulation surface of the lateral condyle is approximately 75% or less of a medial-lateral width of an articulation surface of the medial condyle. Other implementations are also discussed.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: April 26, 2016
    Inventors: Kent M. Samuelson, Connor E. Samuelson
  • Patent number: 9314342
    Abstract: A method of implanting a knee replacement system in a leg with a femur and a tibia of a patient can include, implanting a femoral component onto a condyle of the femur and placing a trial tibial component on a tibial plateau of the tibia. The tension of a posterior cruciate ligament can be adjusted. The tension of an anterior cruciate ligament can be adjusted. The posterior position of the trial tibial component can be adjusted. The knee condition at toe off onset can be simulated during walking.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: April 19, 2016
    Assignee: Biomet Manufacturing, LLC
    Inventors: Thomas P. Andriacchi, Jorge O. Galante
  • Patent number: 9295558
    Abstract: An orthopaedic knee prosthesis includes a tibial bearing component with articular features which operate to protect adjacent soft tissues of the natural knee, promote and/or accommodate desired articulation with an abutting femoral component, and facilitate expedient and effective implantation by a surgeon.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: March 29, 2016
    Assignee: Zimmer, Inc.
    Inventors: Raymond C. Parisi, Jeff Blaylock
  • Patent number: 9265624
    Abstract: Systems and methods for providing deeper knee flexion capabilities. In some instances, such systems and methods include a tibial component that has an asymmetrical articular plateau that includes a medial tibial condylar surface and a lateral tibial condylar surface. In some cases, at least one of the medial condylar surface and the lateral condylar surface includes a concave articulation surface having a lowest point that disposed from a posterior edge of the tibial component by between about 18% and less than about 35% of a total anteroposterior dimension of the tibial component. Other implementations are also discussed.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: February 23, 2016
    Inventors: Kent M. Samuelson, Connor E. Samuelson
  • Patent number: 9265507
    Abstract: A femoral slideway and femoral slideway/femur-size template combination is employed to create an installed knee prosthesis that creates a reduced amount of stress in the collateral ligaments relative to previous prosthesis. In one embodiment, the reduced stress is achieved by employing a femoral slideway/femur-size template combination which results in installation of a femoral slideway which has a smaller dorsal-ventral dimension than a corresponding dimension of the femur prior to resection.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: February 23, 2016
    Assignee: Smith & Nephew Orthopaedics AG
    Inventors: Hans Schmotzer, Peter Schuler, Udo Malzer
  • Patent number: 9237958
    Abstract: The present invention provides an implantable joint prosthesis configured to replace a natural joint, and methods for implantation. The prosthesis may include a first component implantable in a first bone, having a first bearing surface, and a second component implantable in a second bone, having a second bearing surface which corresponds to the first bearing surface. Each bearing surface may include a flattened section such that when the bearing surfaces are placed in cooperation with one another in a preferred orientation, the flattened sections are aligned. Alternatively, the bearing surfaces may have and asymmetric configuration, with non-congruent surfaces that may enable correction of deformity. Several types of implantable joint prostheses are disclosed, including: carpometacarpal, metacarpophalangeal, metatarsophalangeal, distal interphalangeal, proximal interphalangeal, ankle, knee, shoulder, and hip.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: January 19, 2016
    Assignee: Synergy Disc Replacement Inc.
    Inventors: Neil A Duggal, Louise C. Raymond
  • Patent number: 9220600
    Abstract: A knee prosthesis having a femoral component with two condyles, an opening disposed between the two condyles, and a tibial component having bearing surfaces to engage and support each of the femoral component condyles. Moving the femoral and tibial components in flexion from about 0° to about 165° causes medial pivot rotation of the femoral component upon the tibial component. Rotation may be caused by interaction between an asymmetrical cam extending between the femoral condyles and a post disposed between the bearing surfaces and extending superior from the tibial component. Rotation may alternatively be caused by asymmetrical medial and lateral condyles which translate posteriorly upon respective medial and lateral bearing surfaces at disparate rates, without a femoral cam, a tibial post, or a post/cam contact surface. Embodiments of the knee prosthesis may be used in cruciate-substituting or cruciate-retaining procedures. Embodiments of the knee prosthesis may also prevent roll forward.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: December 29, 2015
    Assignee: Aesculap Implant Systems, LLC
    Inventors: William Mihalko, Khaled J. Saleh, Said Moussa, Dominique Mouillet
  • Patent number: 9192480
    Abstract: An orthopaedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and/or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: November 24, 2015
    Assignee: Zimmer, Inc.
    Inventors: Mary S. S. Wentorf, Jeffrey E. Bischoff
  • Patent number: 9132014
    Abstract: The present disclosure provides knee prostheses that replicate at least a portion of the function of an individual patient's anterior cruciate ligament (ACL). An exemplary knee prosthesis includes a femoral component configured to be implanted on the distal end of the patient's femur and a tibial component configured to be implanted on the proximal end of the patient's tibia. In extension, the femoral component and the tibial component may cooperate to limit anterior movement of the tibial component relative to the femoral component. In flexion, the femoral component may be free to rotate relative to the tibial component.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: September 15, 2015
    Assignee: Zimmer, Inc.
    Inventors: Adam H. Sanford, Vincent A. Webster, Dwight T. Todd, Anthony P. Romano, Christopher M. Byrd, Jody L. Claypool, Raymond C. Parisi
  • Patent number: 9084679
    Abstract: The present invention provides a femoral prosthesis for a femur which can enable or allow deep knee flexion without creating excessive tension in the ligamentous structure of the knee. The femoral prosthesis includes an internal non-articulating surface, an external articulating surface, a medial condyle and a lateral condyle. The height of the medial condyle is less than the height of the lateral condyle. A proximal-posterior tip of the medial condyle is rounded and is shifted inwards relative to the native level of the proximal-posterior region of the femur bone to facilitate knee flexion. A method of mounting a femoral prosthesis on a femur is also described.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: July 21, 2015
    Assignee: The General Hospital Corporation
    Inventors: Guoan Li, Kartik Mangudi Varadarajan, Harry E. Rubash
  • Patent number: 8961613
    Abstract: A low friction resurfacing implant system including a first implant component having a first bearing surface and a first engagement surface. The first engagement surface is located opposite the first bearing surface. The first implant component has a leading edge and a trailing edge. The first implant component includes teeth that extend from the first engagement surface. The teeth are arranged in a plurality of rows. The teeth in adjacent rows are offset from each other.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: February 24, 2015
    Assignee: Zyga Technology, Inc.
    Inventors: Robert L. Assell, Brian P. Beaubien, David W. Stassen
  • Patent number: 8945230
    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: Grant
    Filed: May 12, 2010
    Date of Patent: February 3, 2015
    Assignee: ConforMIS, Inc.
    Inventors: Philipp Lang, Daniel Steines, Wolfgang Fitz, Konstantinos Tsougarakis, Rene Vargas-Voracek
  • Patent number: 8936648
    Abstract: A prosthesis for replacing a knee joint between a femur and a tibia can include a femoral component, a tibial component, a bearing and a yoke assembly. The yoke assembly can have a yoke disposed between the bearing and the femoral component and an axle having an axle axis. The axle can hingedly couple the yoke with the femoral component. Rotation of the femoral component about a rotation axis that is perpendicular to the axle axis causes concurrent rotation of the yoke about the rotation axis.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: January 20, 2015
    Assignee: Biomet Manufacturing, LLC
    Inventors: Curt Collard, Michael John Collins, Robert Metzger, Brian M. May, Larabeth G. Ryan
  • Patent number: 8900316
    Abstract: Certain embodiments generally provide an improved tibial base member comprising keel portions that allow one or both cruciate ligaments to be preserved. Other embodiments provide improved lateral and/or medial inserts having a mesial lip that helps relieve and/or prevent impingement between the femoral component and the tibial eminence. Other embodiments provide improved femoral components having various chamfers to provide additional clearance with respect to the tibial eminence and posterior cruciate ligament without decreasing bone coverage.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: December 2, 2014
    Assignee: Smith & Nephew, Inc.
    Inventors: Nathaniel M. Lenz, Richard Michael Smith, Zachary Christopher Wilkinson, Brian W. McKinnon, Abraham B. Salehi, Jonathan Kirk Nielsen, Michael D. Ries, Gerald J. Jerry
  • Publication number: 20140350686
    Abstract: An orthopaedic knee prosthesis includes a femoral component having a condyle surface. The condyle surface is defined by one or more radii of curvatures, which are controlled to reduce or delay the onset of anterior translation of the femoral component relative to a tibial bearing.
    Type: Application
    Filed: August 6, 2014
    Publication date: November 27, 2014
    Inventors: John L. Williams, Said T. Gomaa, John M. Armacost
  • Patent number: 8894715
    Abstract: A knee joint prosthesis assembly according to the present disclosure can include a femoral component, a unitary tibial component, a medial bearing, and a lateral bearing. The femoral component can have a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. The unitary tibial component can have a medial portion that includes a first posterior engagement lip and a first outer securing lip. The tibial component can further include a lateral portion that includes a second posterior engagement lip and a second outer securing lip. The medial bearing can have a first posterior groove formed thereon that selectively engages the first posterior engagement lip and a first outer groove that selectively engages the first outer securing lip.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: November 25, 2014
    Assignee: Biomet Manufacturing, LLC
    Inventors: Robert Metzger, James G. Lancaster
  • Publication number: 20140324177
    Abstract: A joint prosthesis comprising, e.g., a femoral component and a tibial component. The medial and lateral condylar articular surfaces may have substantially uniform and equal radii from full extension to about 90° of flexion. From 90°, the lateral condylar articular surface has a smaller radius than the medial condylar articular surface such that the medial condyle gradually becomes increasingly more proud than the lateral condyle to facilitate internal rotation of the tibia at deep flexion. Also, the tibial articular component may include a post intermediate the medial and lateral compartments that engages a cam on the femoral articular component between the medial and the lateral condylar articular surfaces. The cam and post become congruent at flexion angles of approximately 70° flexion and mate symmetrically during the first 20°-30° of further flexion, and then mate asymmetrically at greater degrees of flexion to force internal rotation of the tibia.
    Type: Application
    Filed: July 15, 2014
    Publication date: October 30, 2014
    Inventors: Douglas Sherman HAWKINS, Mari Susan TRUMAN
  • 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: 20140316527
    Abstract: Methods, systems, and apparatuses are disclosed for a tibial component having shock absorbing features.
    Type: Application
    Filed: April 3, 2014
    Publication date: October 23, 2014
    Inventors: Michael A. McShane, Donald J. Hackman
  • Patent number: 8858643
    Abstract: An orthopaedic knee prosthesis includes a tibial bearing component with surface features which operate to protect adjacent soft tissues of the natural knee throughout a wide range of flexion. More particularly, the tibial bearing component provides an anterior relief space disposed between the dished lateral and medial articular compartments, in which the relief space is convex as viewed from a sagittal perspective across the medial/lateral extent of the relief space.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: October 14, 2014
    Assignee: Zimmer, Inc.
    Inventors: Raymond C. Parisi, Abraham P. Habegger, Peter S. Walker, Jeff C. Blaylock, Kathleen P. Macke
  • Publication number: 20140303740
    Abstract: An orthopaedic knee prosthesis includes a femoral component having a condyle surface. The condyle surface is defined by one or more radii of curvatures, which are controlled to reduce or delay the onset of anterior translation of the femoral component relative to a tibial bearing.
    Type: Application
    Filed: June 19, 2014
    Publication date: October 9, 2014
    Inventors: Mark A. Heldreth, David D. Auger, Joseph G. Wyss, Danny W. Rumple, JR., Christel M. Wagner, Dimitri Sokolov, Jordan S. Lee, John L. Williams, Said T. Gomaa, John M. Armacost
  • Publication number: 20140296991
    Abstract: A joint implant assembly including a spherical shaped component adapted to securing to an end of a first joint defining bone and a recess shaped component adapted to securing to an end of a second joint defining bone. Each of the components establishes an opposing wear surface, at which microscopic sized particles build up over time resulting from prolonged use of the joint. At least one of the spherical and recess shaped components exhibits a plurality of interior entrapment chambers, each of which including a narrow-most entranceway location communicating with the wear surface. The entrapment chambers further exhibit outwardly widening capture profiles extending within the associated component for securing volumes of the microscopic particles away from a zone defined between the wear surfaces.
    Type: Application
    Filed: May 21, 2014
    Publication date: October 2, 2014
    Applicant: Linares Medical Devices, LLC
    Inventors: MIGUEL A. LINARES, Miguel A. Linares, JR., Ryan T. Greene
  • Publication number: 20140288659
    Abstract: The invention relates to a knee spacer for temporary replacement of an artificial knee joint, whereby the knee spacer comprises a tibial component and a femoral component as separate components, which can be moved with respect to each other when inserted in a patient, and whereby the tibial component and the femoral component each comprise at least one running surface by means of which the tibial component and the femoral component can be placed against each other such as to be mobile in their patient-inserted state, and the tibial component comprises an anchoring surface that is arranged opposite to the running surface side and is provided for connecting the tibial component to the tibia by means of a bone cement, and the femoral component to comprise an anchoring surface that is arranged opposite to the running surface side and is provided for connecting the femoral component to the femur, whereby the tibial component and the femoral component each comprise at least two recesses that extend from the anchori
    Type: Application
    Filed: February 26, 2014
    Publication date: September 25, 2014
    Applicant: Heraeus Medical GmbH
    Inventor: Sebastian Vogt
  • Publication number: 20140277537
    Abstract: Knee implant systems and methods for implantation or use in a knee joint, are disclosed. A knee implant system can include at femoral component having a femur-contacting surface and an opposing articulation surface, and proximal, distal, anterior and posterior portion. The femoral component can include a medial condyle and a lateral condyle, where each of the condyles define respective distal-most points and have substantially equal widths. The width of each of the condyles can define respective condyle midpoints, where the distal-most points can be located laterally from the midpoints. The femoral component can include a trochlear groove that can define a distal-most sulcus point located halfway between the distal-most point of the medial condyle and the distal-most point of the lateral condyle.
    Type: Application
    Filed: March 7, 2014
    Publication date: September 18, 2014
    Inventors: Dwight Todd, Alex Stoller, Aravinda Bobba, Harish Kumar
  • 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
  • Patent number: 8834575
    Abstract: An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the radius of curvature of the condyle surface may be increased during mid-flexion.
    Type: Grant
    Filed: May 28, 2012
    Date of Patent: September 16, 2014
    Assignee: DePuy (Ireland)
    Inventors: Joseph G. Wyss, Dimitri Sokolov, Jordan S. Lee, John L. Williams, Said T. Gomaa, John M. Armacost, Christel M. Wagner
  • Publication number: 20140257503
    Abstract: A joint assembly incorporated into reconditioned end surfaces established between an upper bone and an opposing lower bone. The assembly includes a pair of first components anchored into reconditioned bone end surfaces of a first joint defining bone and exhibiting a flexible and band-shaped loop displace-ably supported along exposed undersides established between outer portions which are assembled around the bands. A second component anchored into a second reconditioned end surface of a second joint defining bone exhibits a planar support surface upon which said bands are in contact with and displace during articulating motion of the bones. Entrapment pockets are formed within the first components for collecting wear particles and debris resulting from displacement of the belt.
    Type: Application
    Filed: May 19, 2014
    Publication date: September 11, 2014
    Applicants: Linares Medical Devices, LLC
    Inventors: MIGUEL A. LINARES, Miguel A. Linares, JR.
  • Patent number: 8828086
    Abstract: An orthopaedic knee prosthesis includes a femoral component having a condyle surface. The condyle surface is defined by one or more radii of curvatures, which are controlled to reduce or delay the onset of anterior translation of the femoral component relative to a tibial bearing.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: September 9, 2014
    Assignee: DePuy (Ireland)
    Inventors: John L. Williams, Said T. Gomaa, John M. Armacost