A knee prosthesis and method for use are provided, in which the knee prosthesis provides anterior and posterior stability and controlled femoral roll-back, while also providing rotational kinematics. The femoral component has a pair of convexly shaped condyles which are spaced apart to form an intercondylar notch. Anterior and posterior cams are provided within the notch. The tibial component comprises a platform upon which a tibial bearing is mounted to provide for rotational movement about the tibial axis. The tibial bearing is provided with surfaces to engage the condyles and has an upwardly extending spine which is positioned to engage the anterior and posterior femoral cams. At full extension, the spine engages the anterior femoral cam to provide a 3Â hyperextension stop. Between full extension and approximately 50Â of flexion, the spine is free to translate between the anterior and posterior femoral cams. From 50Â to 120Â of flexion, the spine engages the posterior femoral cam, which provides femoral roll-back and posterior stability.
Donald E. Running - Warsaw IN, US Robert Courtney, Jr. - Pierceton IN, US Jeffrey A. Farris - Berne IN, US
International Classification:
A61B 17/80
US Classification:
606295, 606 71
Abstract:
A fracture fixation plate with cover sheath having a head element that is rigidly connected to a plate element in an upwardly angled direction. The head element is anatomically shaped and includes medial and lateral sheath recesses wherein non-threaded bone screw holes and a threaded sheath screw hole are located. Cylindrical head bone screws are inserted through the sheath recess and oriented at set angles allowing for bone fragment fixation and fracture reduction. Medial and lateral sheath elements are placed within the boundaries of their respective sheath recesses and are secured with a sheath screw. The sheath elements contact the heads of the inserted bone screws restricting and maintaining their implanted positions. Alternative sheath elements with outreaching medial, lateral and distal fragment capture flanges may also be utilized. The plate element includes at least one longitudinal slot with several bone screw holes for use with pivotable spherical headed bone screws.
Donald Eli Running - Warsaw IN, US Jeffrey Ondrla - Leesburg IN, US Thomas Hunt - Birmingham AL, US R. Churchill - Mequon WI, US
International Classification:
A61F 2/30
US Classification:
606062000
Abstract:
An intramedullary bone plate with sheath having an intramedullary stem, a bone plate head and a neck that connects the intramedullary stem to the bone plate head in a manner where the stem and head are offset from each other longitudinally and axially in the sagittal plane. The bone plate head includes a sheath recess wherein non-threaded bone screw holes and a threaded sheath screw hole are located. Bone screws are inserted through the sheath recess and oriented at set angles allowing for bone fragment fixation and fracture reduction. A sheath element is placed within the boundaries of the sheath recess and secured with the sheath screw. The intramedullary stem includes longitudinal flutes in its distal portion and a bi-arced geometry in its proximal portion providing for stabilization of the implanted device. The bone plate head configuration provides for more complete fracture capture and multiple fixation modalities.
Kevin L. Ohashi - Jamaica Plain MA, US Donald E. Running - Warsaw IN, US Robert J. Ball - West Olive MI, US Randip R. Bindra - Clarendon Hills IL, US John J. Fernandez - Chicago IL, US Dale R. Peterson - Carlsbad CA, US
International Classification:
A61F 2/46 A61F 2/42
US Classification:
623 2112
Abstract:
The implant () is shaped to generally mimic the form of the trapezium (), or portions thereof. For example, the implant optionally defines a first metacarpal projection () and a second metacarpal projection () spaced from the first metacarpal projection to form a C-type, or cuff-type receptacle () for receiving the first metacarpal () such as the first and second metacarpal projections extend along either side of the first metacarpal. The receptacle optionally acts as a support surface (A) for the first metacarpal during articulation thereof. In some embodiments, the first metacarpal projection is configured to extend adjacent the end portion of the first metacarpal that is adjacent the CMC joint () and the second metacarpal projection is configured to extend into the space () between the end portions of the first and second metacarpals (), thereby helping maintain the intermetacarpal spacing between the first and second metacarpals. The implant may comprise an inflatable cover for minimally invasive implantation.
A knee prosthesis and method for use are provided, in which the knee prosthesis provides anterior and posterior stability and controlled femoral roll-back, while also providing rotational kinematics. The femoral component has a pair of convexly shaped condyles which are spaced apart to form an intercondylar notch. Anterior and posterior cams are provided within the notch. The tibial component comprises a platform upon which a tibial bearing is mounted to provide for rotational movement about the tibial axis. The tibial bearing is provided with surfaces to engage the condyles and has an upwardly extending spine which is positioned to engage the anterior and posterior femoral cams. The posterior surface of the upwardly extending spine is arranged coincident with the tibial axis. At full extension, the spine engages the anterior femoral cam to provide a 3Â hyperextension stop. Between full extension and approximately 50Â of flexion, the spine is free to translate between the anterior and posterior femoral cams.
Inset/Onlay Glenoid, Porous Coated Convertible Glenoid, And Humeral Heads With Textured Undersides
- Holland MI, US Donald E. Running - Missoula MT, US
International Classification:
A61F 2/40 A61F 2/30
Abstract:
Disclosed are prosthesis systems and methods that provide porous fixation rings by which the articulating surfaces of the implant can be exchanged such that the anatomic surfaces can be converted to reverse surfaces, while not exchanging the fixation components. Also disclosed herein are methods by which the surgeon can implant an inset anatomic articulating glenoid implant whereby at a later date, can remove the anatomic articulating surface and replace it with a reverse articulating surface such that the primary means of fixation remains well fixed in the glenoid fossa at the moment of articular exchange.
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