Femoral Bone Patents (Class 623/20.35)
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Patent number: 6770099Abstract: A femoral component for a prosthetic knee implant system. The femoral component comprises medial and lateral condyles, wherein the height of the medial condyle is greater than the height of the lateral condyle.Type: GrantFiled: November 19, 2002Date of Patent: August 3, 2004Assignee: Zimmer Technology, Inc.Inventors: Thomas Andriacchi, Ron Donkers, James Harris, Audrey Patmore, Scott Steffensmeier, Shinro Takai, Linggawati Tanamal, Peter Walker
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Patent number: 6746453Abstract: A targeting apparatus for use in performing transfemoral osteotomy surgery includes a support element provided with a drill guide. A device is provided for securing the support element to a prosthesis to be implanted, and to a resectioned femur. An adjusting device for adjusting the angular position of the drill guide in relation to the resectioned femur about a proximal-distal axis is also included.Type: GrantFiled: November 8, 2001Date of Patent: June 8, 2004Assignee: Benoist Girard SASInventors: Nicolas Delogé, Jean-Pierre Brée, Arnaud Aux Epaules, Philippe Lavieille, Christophe Cueille
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Publication number: 20040102851Abstract: A modular knee prosthetic system used to replace the natural knee and including two distal posterior femoral components and one patellar-femoral joint component. The components have a smooth outer condylar surface and an inner bone-engaging surface and are connectable to form either an unicompartmental or bicompartmental femoral knee prosthesis.Type: ApplicationFiled: November 22, 2002Publication date: May 27, 2004Inventor: Joseph Saladino
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Publication number: 20040098132Abstract: A femoral component for a prosthetic knee implant system. The femoral component comprises medial and lateral condyles, wherein the height of the medial condyle is greater than the height of the lateral condyle.Type: ApplicationFiled: November 19, 2002Publication date: May 20, 2004Inventors: Thomas Andriacchi, Ron Donkers, James Harris, Audrey Patmore, Scott Steffensmeier, Shinro Takai, Linggawati Tanamal, Peter Walker
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Publication number: 20040098133Abstract: 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: ApplicationFiled: November 12, 2003Publication date: May 20, 2004Inventors: Roger Carignan, Clyde R. Pratt
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Patent number: 6712856Abstract: 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 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: GrantFiled: March 17, 2000Date of Patent: March 30, 2004Assignee: Kinamed, Inc.Inventors: Roger Carignan, Clyde R. Pratt
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Publication number: 20040059426Abstract: A femoral slideway and a 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 prostheses. 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: ApplicationFiled: July 9, 2003Publication date: March 25, 2004Inventors: Hans Schmotzer, Peter Schuler, Udo Malzer
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Publication number: 20030233149Abstract: A unicondylar femoral component for use in a partial knee arthroplasty. A femoral component of the present invention comprises a post and a flange having a predetermined angle there between whereby a clamping force is placed on a patient's distal femur to hold the implant in place. The implant further comprises a porous layer on its bone contacting surface. In an alternative embodiment the femoral component is attached to the distal femur at least two threaded fasteners.Type: ApplicationFiled: June 18, 2002Publication date: December 18, 2003Inventor: Robert Hodorek
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Publication number: 20030225458Abstract: A femoral component and provisional femoral component system for use in an endoprosthetic knee joint. The femoral component system of the present invention comprises a universal contacting surface geometry and a plurality of unique external articulating surface geometries to accommodate a variety of knee joint sizes and knee ligament tension situations.Type: ApplicationFiled: June 4, 2002Publication date: December 4, 2003Inventors: Ron Donkers, Alyssa Perry, Scott Steffensmeier, Linggawati Tanamal, Michelle Zawadzki
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Publication number: 20030220697Abstract: A femoral knee prosthesis system for resurfacing a resected articular surface at the distal end of a femur includes a femoral component adapted to mate with the resected articular surface; and an attachment member. The interior surface of the femoral component is configured to connect to the first attachment member when the femoral component is mated on the resected articular surface of the femur and when the first attachment member is passed through the medial side or the lateral side of the resected articular surface. The femoral component is available in one-piece and two-piece systems. Mating femoral components (e.g., tapered or with lips that interlock with grooves) are also disclosed.Type: ApplicationFiled: May 23, 2003Publication date: November 27, 2003Inventors: Daniel F. Justin, E. Marlowe Goble
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Publication number: 20030199985Abstract: A distal femoral knee-replacement component provides additional points of cam action to facilitate a more normal rollback while inhibiting initial translation which could lead to increased wear and sub-optimal patella femoral mechanics. The inventive component preferably includes additional points of cam action, useable separately or together, to prevent early translation at the initiation of flexion, and a distinct point of cam action to prevent a dislocation of the femoral component over the tibial post which often occurs in cruciate-substituting designs. The preferred embodiment includes three distinct point of cam action. The first is preferably located substantially where existing cams are found, namely, at a point spaced apart a slight distance posteriorly relative to the post in full extension. A second point of cam action is located immediately adjacent the posterior aspect of the superior post to minimize and, ideally, prevent anterior translation at the initiation of flexion.Type: ApplicationFiled: May 6, 2003Publication date: October 23, 2003Inventor: Michael A. Masini
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Publication number: 20030158606Abstract: A knee arthroplasty prosthesis includes a femoral component having multiple pieces with engagement means provided for engaging various pieces of the femoral component to one another following their insertion in the incised area of the femur. A tibial component includes multiple pieces designed for assembly following positioning in the incision. The tibial component includes a Morse taper cavity on one piece of the tibial component and a Morse taper extension on another member of the component for receipt therein.Type: ApplicationFiled: February 19, 2003Publication date: August 21, 2003Inventors: Thomas M. Coon, Alfred J. Tria, Donald M. Smucker, Richard R. Van Zile
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Patent number: 6589283Abstract: 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: GrantFiled: May 15, 2001Date of Patent: July 8, 2003Assignee: Biomet, Inc.Inventors: Robert Metzger, Troy Hershberger
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Patent number: 6540787Abstract: A femoral part of a knee prosthetic of the type known as comprising three compartments, including two condyles (2) and a trochlea surface part (3) wherein the femoral part is to be anchored to the distal extremity of a femur and the external surface of the condyles is to co-operate with the upper external surface of a tibia insert such that, in a longitudinal section, the trochlea support surface (3) defines a trochlean trajectory following a first circular arc and, still in a longitudinal section, the external surface of the condyles (2) includes at least partially an intermediary circular arc (5), characterised in that in a longitudinal section, the external surface of the condyles (2) comprises an intermediary surface (5) and an extremity surface (6) both of which are a circular arc, with the intermediary circular arc (5) extending over an angle of 80° to 90°, the extremity circular arc (6) extending over an angle of 40° to 50°, the value of the curvature radius of the extremity arc (6) beiType: GrantFiled: January 31, 2001Date of Patent: April 1, 2003Assignee: AesculapInventors: Jean-François Biegun, Pascal Marceaux
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Publication number: 20020138150Abstract: Femur parts of knee prostheses are shown with the invention which have a center part (2) and a condyle part (3) with contact surfaces (4a, 5a, 6a, 6b, 7b, 8a, 9a, 10a, 11a, 11b, 12a, 12b, 13b) with respect to a resectioned femur stump (1), with the center part (2) having guide surfaces (20) for a patella (19) and outer contact surfaces (4a, 5a) which are at an acute angle &agr;≦90° relative to one another, while the condyle part (3) has running surfaces (27, 28) for the articulation movement and outer contact surfaces (6b, 7b) at an acute angle &bgr;≦90° relative to one another. The center part (2) and the condyle part (3) can be pushed onto the femur stump separately from one another at push-on directions pivoted with respect to one another in order to allow a greater flexion, with the center line of the angle &bgr; being pivoted through an angle of 15°≦&ggr;≦60° with respect to the center line of the angle &agr;.Type: ApplicationFiled: January 10, 2002Publication date: September 26, 2002Applicant: Sulzer Orthopedics, Ltd.Inventor: Vincent Leclercq
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Publication number: 20020082704Abstract: Osteoarticular allografts are transplanted by techniques which ensure substantial surface contour matching. Specifically, surgical techniques are provided whereby a plug from an osteochondral allograft may be transplanted to a cavity site which remains after a condylar defect is removed from a patient's condyle. In this regard, the present invention essentially includes placing an osteochondral allograft in substantially the same orientation as the patient condyle, and then removing the transplantable plug therefrom and forming the cavity site in the patient condyle while maintaining their relative same orientation. In this manner, the surface of the transplanted plug is matched to the contour of the excised osteochondral tissue.Type: ApplicationFiled: February 28, 2002Publication date: June 27, 2002Applicant: CRYOLIFE, INC.Inventor: Daniel G. Cerundolo
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Patent number: 6402786Abstract: A femoral knee implant includes a fourth compartment of articulation. The superior posterior articulating surface is achieved by first increasing the thickness of the superior posterior condylar portion of the femoral component to widen the superior posterior edge of the posterior condyle. Second, the newly created surface at the superior posterior condyle is smoothly rounded to provide an articular surface with no sharp changes in the surface contours. In one embodiment, the fourth articular compartment of this invention is provided in a one piece femoral design. In another embodiment, it is provided as a modular addition to an existing prior art femoral component. In another embodiment, the fourth compartment is combined with a posterior stabilized (PS) TKR design that includes a tibial post and cooperating femoral cam characterized by low engagement of the cam on the spine.Type: GrantFiled: June 29, 2000Date of Patent: June 11, 2002Assignee: Zimmer, Inc.Inventors: John N. Insall, Mark Heldreth, Vince Webster, Steve Zawadski, Roy Yoshikazu Hori, Kyoko Ohkuni, Audrey Beckman, William Rohr
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Publication number: 20020045947Abstract: The femoral component of a knee prosthetic includes a trochlean part (3) and at least one, but preferably two condyles (2) wherein a trochlean trajectory is defined within the external surface of the component by the trochlea. A set of internal flat sides (5, 6, 7, 8 and 9) are implemented to make contact with corresponding re-cut sides of the extremity of the femur and define an internal open cage within the internal surface of said component and further define edges (15, 16, 17 and 18) between themselves. The perpendicular projection (4) of said trochlean trajectory in the medial lateral perspective of said femoral component has a tilt angle (alpha) with a value different from zero relative to the line (23) perpendicular to the perpendicular projection of said edges in said medial lateral perspective.Type: ApplicationFiled: October 17, 2001Publication date: April 18, 2002Applicant: AesculapInventors: Jean-Francois Biegun, Pascal Marceaux
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Patent number: 6364911Abstract: A femur slide has a patella shield and two convex curved condyle cups which are anteriorly rigidly joined by the patella shield. The two condyle cups and the patella shield define internally anterior and posterior matching surfaces which correspond with a femural ventral cut and with a femural dorsal cut. Relative to a reference plane which is defined by posterior slide surfaces of the condyle cups, an anterio-medial matching surface lies nearer to the reference plane than an anterio-lateral matching surface. The anterior matching surfaces are defined by a slanted surface with is continuously slanted in a direction from lateral to medial to posterior, and an angle between the slanted surface and the reference plane lies between three and ten degrees.Type: GrantFiled: March 8, 2000Date of Patent: April 2, 2002Assignee: Plus Endoprothetik AGInventors: Hans Schmotzer, Peter Schuler, Udo Malzer
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Patent number: 6299645Abstract: A knee joint prosthesis is provided for implanting on the tibial plateau and femoral condyle of the knee. The prosthesis includes a tibial prosthesis having a tibial fixation surface on the tibial prosthesis adapted to be positioned on the tibial plateau. The tibial fixation surface has at least one tibial attachment means for securing the tibial prosthesis to the tibial plateau. It further includes a femoral prosthesis having a femoral fixation surface adapted to be positioned on the femoral condyle. The femoral fixation surface has at least one femoral attachment means for securing the femoral prosthesis to the femoral condyle. The prosthesis further includes a bearing member supported by the tibial prosthesis for engaging the femoral prosthesis in weight bearing relationships.Type: GrantFiled: July 23, 1999Date of Patent: October 9, 2001Inventor: William S. Ogden
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Publication number: 20010021877Abstract: A femoral part of a knee prosthetic of the type known as comprising three compartments, including two condyles (2) and a trochlea surface part (3) wherein the femoral part is to be anchored to the distal extremity of a femur and the external surface of the condyles is to co-operate with the upper external surface of a tibia insert such that, in a longitudinal section, the trochlea support surface (3) defines a trochlean trajectory following a first circular arc and, still in a longitudinal section, the external surface of the condyles (2) includes at least partially an intermediary circular arc (5), characterized in that in a longitudinal section, the external surface of the condyles (2) comprises an intermediary surface (5) and an extremity surface (6) both of which are a circular arc, with the intermediary circular arc (5) extending over an angle of 80° to 90°, the extremity circular arc (6) extending over an angle of 40° to 50°, the value of the curvature radius of the extremity arc (6) beiType: ApplicationFiled: January 31, 2001Publication date: September 13, 2001Applicant: AesculapInventors: Jean-Francois Biegun, Pascal Marceaux
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Publication number: 20010018615Abstract: A complete prosthetic of the knee includes a femoral part (6) and a meniscus (3), with said femoral part (6) comprising at least one condyle (3) and a trochlea part, wherein said one or a plurality of condyles each have an external surface, the shape of which complements the respective upper surface of said meniscus (3) in order to obtain a congruence of said surfaces on at least part of the normal flexing range. At least one cavity is implemented in said trochlea such that the femoral part is blocked in its flexion by rotation in the case of negative angles beyond an inferior negative angle limit when the anterior upper edge of the meniscus comes to rest against said cavity.Type: ApplicationFiled: February 12, 2001Publication date: August 30, 2001Applicant: AesculapInventors: Jean-Francois Biegun, Pascal Marceaux
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Publication number: 20010016778Abstract: The invention relates to a knee-joint endoprosthesis with a metallic femoral part (2) anchored in the femur that articulates with a tibial part anchored in the tibia bone, the articulating surface of the femoral part (2) being a ceramic structural member (3) that is connected to the femoral part (2) in mechanically stable manner.Type: ApplicationFiled: February 1, 2001Publication date: August 23, 2001Inventors: Dirk Badorf, Hartmut Kalberer
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Patent number: 6245110Abstract: A knee joint endoprosthesis has an element for the femur (2) which is substantially U-shaped when seen from a medial to a lateral angle, one horizontal, two diagonal and two vertical support surfaces facing the femur for accommodation on the resected femur bone, which is fitted with two runners (24, 25), and an element for the tibia (1) having two slide tracks (4, 5) on which the runners for the femur element can roll, and optionally slide, and a horizontal support surface (6) facing the tibia for accommodation on the resected tibia. The femur element (20) and tibia element (1) are configured without any shanks. At least both diagonal support surfaces of the femur element (2) and the horizontal support surface (6) of the tibia element (20) are fitted with an open-mesh, three-dimensional spatial network structure (7) which is an integral component of the base structures (8, 8′) of the femur element (20) and the tibia element (1).Type: GrantFiled: December 14, 1999Date of Patent: June 12, 2001Assignee: ESKA Implants GmbH & Co.Inventors: Hans Grundei, Wolfram Thomas