Tibial Stem Structure Patents (Class 623/20.34)
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Publication number: 20030171815Abstract: A prosthetic component includes an adaptor having a first end and a second end. The first end includes an elongated male tapered body. The second end includes a flange extending radially outwardly from the male tapered body and having an anti-rotational/anatomically orientation component formed therewith. The second end also includes a female tapered aperture formed therein which has an anti-rotational/anatomical orientation component formed therewith. The flange may include an elongated portion having a porous annular surface thereon.Type: ApplicationFiled: March 12, 2003Publication date: September 11, 2003Inventors: Richard J. Kana, Richard J. Taft
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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: 6569202Abstract: An orthopedic component for total joint replacement that comprises a metal tray (3) and polymer liner (27), the metal tray having screw holes (7a, 7b) for fixation with screws (9) to bone and a circumferential rim or wall (15) with a smooth inner surface (21). The liner (27) is provided with a flexible sealing ridge (39) around its entire periphery, the sealing ridge being positioned so that it sealingly engages the tray rim so as to form a fluid-tight seal between the liner and the tray. The liner is provided with a locking mechanism comprised of tabs at the longitudinal ends of the liner which engage grooves in the front and rear of the tray.Type: GrantFiled: December 19, 2001Date of Patent: May 27, 2003Assignee: Whiteside Biomechanics, Inc.Inventor: Leo A. Whiteside
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Publication number: 20030078669Abstract: The present invention provides a tibial tray assembly for attaching within a cavity formed in a tibia. The tibial tray assembly includes a main body, an anchor, and a compliant portion disposed between the main body and the anchor. The main body includes a tibial tray that is operable to engage a prepared tibia surface. The anchor is operable to be retained within the cavity formed in the tibia and includes an attachment mechanism located within the cavity and operable to fixedly attach the anchor within the cavity formed within the tibia. The compliant portion disposed between the main body and the anchor is operable to be expanded and contracted.Type: ApplicationFiled: November 27, 2002Publication date: April 24, 2003Inventors: Daniel L. Martin, John Robert White
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Publication number: 20030055508Abstract: A modular tibial component for a knee joint prosthesis. The modular tibial component includes a tray, a stem and an adapter assembly. The tray includes a support surface and downwardly extending extension having a generally circular shape. The stem includes a main body portion and an upwardly extending extension. The adapter assembly connects the tray and the stem. The adapter assembly includes a first generally cylindrical cavity receiving the downwardly extending extension of the tray and a second generally cylindrical cavity receiving the upwardly extension of the stem.Type: ApplicationFiled: November 7, 2002Publication date: March 20, 2003Inventors: Robert G. Metzger, Jacy C. Hoeppner
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Patent number: 6506216Abstract: A tibial prosthesis includes a tibial platform having a medial-lateral center and an inferior surface matable with a resected proximal tibia, and a modular keel that is fixable to the inferior surface and adjustable in a medial-lateral direction with respect to the medial-lateral center of the tibial platform.Type: GrantFiled: June 16, 2000Date of Patent: January 14, 2003Assignee: Depuy Products, Inc.Inventors: Diana F. McCue, Scott E. Dutiel
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Publication number: 20020120340Abstract: A modular tibial component for a knee joint prosthesis. The modular tibial component includes a tray, a stem and an adapter assembly. The tray includes a support surface and downwardly extending extension having a generally circular shape. The stem includes a main body portion and an upwardly extending extension. The adapter assembly connects the tray and the stem. The adapter assembly includes a first generally cylindrical cavity receiving the downwardly extending extension of the tray and a second generally cylindrical cavity receiving the upwardly extension of the stem.Type: ApplicationFiled: February 23, 2001Publication date: August 29, 2002Inventors: Robert G. Metzger, Jacy C. Hoeppner
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Patent number: 6436145Abstract: An orthopaedic device for implanting on a bone includes a first component having a socket forming a first member of a morse taper lock. A second component has an end forming a second member of a morse taper lock received in the socket. A protuberance is provided on one of the first and second members. Impacting the second component inserted in the socket seats the second component in the socket, and creates a localized deformation of the interference fit between the first and second components and establishes a barrier to the passage of debris.Type: GrantFiled: June 2, 2000Date of Patent: August 20, 2002Assignee: Zimmer, Inc.Inventor: Clayton Miller
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Patent number: 6387131Abstract: A knee prosthetic including a tibia part (1), which includes a tibia plate (2) that co-operates with at least one meniscal element by a first side (4), and co-operates with a tibia resection plan by a second side (5), including a tibia pin (3) connected with the tibia plate (2), which penetrates into the tibia to fix the tibia part (1) into it; and at least one compensating tibia block (6), which fits flatly between the second side (5) of the tibia plate (2) and the tibia itself, in order to compensate for a lack or absence of local bone tissue between the tibia and the resection plan. This tibia block (6) also co-operates with said tibia part (1) by way of complementary fixating means (10, 11) that are implemented on the tibia block (6) and tibia part, wherein the complementary fixating means are of the pin (10) and hole (11) type and are implemented on the tibia block and the base (9) of the tibia pin.Type: GrantFiled: April 12, 2000Date of Patent: May 14, 2002Assignee: AesculapInventors: Rolf K. Miehlke, Jean-Louis Jermann
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Patent number: 6379388Abstract: A tibial prosthesis locking system. The system includes a tibial plate and an articular surface component or tibial insert. A proximal side of the tibial plate includes perimeter sidewalls with holding flanges formed thereon, and male retaining projections are formed on interior portions of the proximal tibial plate. A distal side of the articular surface component is designed to interlock with the holding flanges and retaining projections formed on the tibial plate. The male retaining projections and the holding flanges cooperatively engage with the articular surface component to provide it with resistance to movement in an anterior-posterior direction, a medial lateral direction, a rotational direction, and a vertical direction.Type: GrantFiled: December 8, 1999Date of Patent: April 30, 2002Assignee: Ortho Development CorporationInventors: Michael D. Ensign, Scott Shaver, Michael H. Bourne, E. Marc Mariani
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Patent number: 6355069Abstract: A bone prosthesis is provided which includes an implantable elongate stem member having a bore extending therethrough. The stem member has a proximal end and a distal end with at least one slot formed in the distal end. The slot extends along at least a portion of the stem member, in a longitudinal direction, from the distal end towards the proximal end to form at least two tines at the distal end of the stem. A bolt member is disposed within the bore of the stem member and has a proximal end and a distal end, wherein at least a portion of the bolt member proximate the distal end is threaded. An expander nut is disposed between the tines and is threadably matable with the distal end of the bolt member such that rotation of the bolt member in a first direction is effective to draw the expander nut towards the proximal end of the stem member to separate the tines at the distal end of the stem member.Type: GrantFiled: August 20, 1998Date of Patent: March 12, 2002Assignee: Depuys Orthopaedics, Inc.Inventors: Alfred F. DeCarlo, Jr., Hugh U. Cameron
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Patent number: 6258127Abstract: A tibia part of a knee joint prosthesis includes a tibia platform having a distal side, and an anchoring element. The anchoring element is arranged on the distal side of the tibia platform and attached to the tibia platform. In one embodiment, the anchoring element is formed by a shield having a height which is smaller than a width of the shield, and the shield has a U-, C- or V-shape as seen from the tibia platform.Type: GrantFiled: July 23, 1999Date of Patent: July 10, 2001Assignee: PLUS Endoprothetik AGInventor: Hans Schmotzer
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Patent number: 6224632Abstract: A tibia fixturing device comprises a metal tray formed with annularly spaced recesses in its underside at a depth of at least about 1.5 mm and from which a stem depends for axial insertion into a tibia conical cavity. The stem has a circular cylindrical portion proximal the tray and a conical portion distal the tray. Fins radially extend from the stem cylindrical portion and penetrate the tibia to provide some torsional resistance. Axially extending channels are formed about the stem periphery which channels have bottom surfaces parallel to the stem axis to provide further torsional resistance. The channels are arranged to not interlock with the cement in the axial direction to permit the cement to separate first from the device during axial removal of the device from the bone. The fins have inclined edges distal the tray and inclined radial outer edges to align and center the stem to the bone cavity edge.Type: GrantFiled: September 20, 1996Date of Patent: May 1, 2001Assignee: Biomedical Engineering Trust IInventors: Michael J. Pappas, Frederick F. Buechel
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Patent number: 6217619Abstract: An endoprosthesis for replacing at least part of a tibia, includes an elongate shaft extending longitudinally in the direction of a lower leg and having an upper end facing a knee joint and a lower end facing a natural talus. An endoprosthetic knee joint having a tibial plateau is secured to the upper end of the shaft. The talus supports a coupling portion which is connected to the lower end of the shaft.Type: GrantFiled: December 4, 1998Date of Patent: April 17, 2001Assignees: GMT Gesellschaft für medizinische Technik mbH, Waldemar Link GmbH & Co. KGInventor: Arnold Keller
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Patent number: 6214052Abstract: A tibial prosthetic implant with a reversible offset stem includes a base and a boss extending from the base. A reversible keel member includes a first end attached to the boss and a second end including an offset stem receiver. A stem includes a stem attachment extending at an angle from a first end thereof and connected to the offset stem receiver such that attaching the angled end of the stem to the offset stem receiver when the keel is in a first position, offsets the stem in a first direction, whereas, attaching the angled end of the stem to the offset stem receiver when the keel is in a second position, reversed from the first position, offsets the stem in a second direction.Type: GrantFiled: January 19, 1999Date of Patent: April 10, 2001Assignee: Sulzer Orthopedics Inc.Inventor: Brian Burkinshaw
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Patent number: 6171342Abstract: A medical fastening system for a modular knee prosthesis system includes a femoral component having a first surface, a second surface, and an aperture extending therebetween. A modular adapter element has a first end that is mountable adjacent the first surface of the femoral component and a second, mating end that is engagable with a second prosthesis component. The system also includes a first bolt that mates the adapter element to the femoral component. Various connection options are possible to secure different components of the system to each other.Type: GrantFiled: March 30, 1998Date of Patent: January 9, 2001Assignee: Depuy Orthopaedics, Inc.Inventors: Michael J. O'Neil, Arnold Oyola, Dennis Sullivan, Amit Birla, John E. Slamin, Dennis P. Colleran, Stefan M. Gabriel, George B. Cipolletti, Richard E. Jones