Source: http://www.google.com/patents/US5800553?dq=U.S.+patent+number+7,325,728&ei=Y93TTteOAe702wW6uqi1BQ
Timestamp: 2015-01-30 06:02:48
Document Index: 277041093

Matched Legal Cases: ['art 5', 'art 5', 'art 6', 'art 7', 'art 6', 'art 7', 'art 7', 'art 10', 'art 12', 'art 12']

Patent US5800553 - Hip joint prosthesis to be permanently anchored within a femur of a patient - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA hip joint prosthesis to be permanently anchored in a patient's hip is disclosed. The prosthesis comprises an attachment part for a ball unit designed to be anchored in the neck of a human femur. The attachment part comprises a primary fixture which may be an elongate anchoring element which is intended...http://www.google.com/patents/US5800553?utm_source=gb-gplus-sharePatent US5800553 - Hip joint prosthesis to be permanently anchored within a femur of a patientAdvanced Patent SearchPublication numberUS5800553 APublication typeGrantApplication numberUS 08/185,814Publication dateSep 1, 1998Filing dateJul 4, 1992Priority dateJul 23, 1991Fee statusLapsedAlso published asDE69230001D1, DE69230001T2, EP0600917A1, EP0600917B1, WO1993001769A1Publication number08185814, 185814, US 5800553 A, US 5800553A, US-A-5800553, US5800553 A, US5800553AInventorsBjorn Albrektsson, Magnus Jacobsson, Lars Carlsson, Tord Rostlund, Stig WennbergOriginal AssigneeAktiebolaget AstraExport CitationBiBTeX, EndNote, RefManPatent Citations (30), Referenced by (34), Classifications (29), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetHip joint prosthesis to be permanently anchored within a femur of a patientUS 5800553 AAbstract A hip joint prosthesis to be permanently anchored in a patient's hip is disclosed. The prosthesis comprises an attachment part for a ball unit designed to be anchored in the neck of a human femur. The attachment part comprises a primary fixture which may be an elongate anchoring element which is intended to be inserted into a channel extending through the femoral collum. The prosthesis also includes a secondary fixture for carrying a ball intended to be attached to the collum after removal of the head of the collum. The primary fixture and the secondary fixture are connected to each other. The prosthesis is preferably designed so that the length of the primary fixture terminates close to the head of the collum. The secondary fixture preferably comprises a plug-like part which is intended to be inserted in a cylindrical countersunk recess that is cut into the cancellous bone of the collum and which extends to the cortical bone in at least three locations.
We claim: 1. A fixture for a hip joint prosthesis adapted in use to be permanently anchored in a channel provided in a human femur which extends forwardly into the femur neck from an opening in a femur neck section exposed by resection of the femur head towards a position below the greater trochanter of the femur and comprising a rearward section which extends forwardly from the opening and transversely to the outer surface layer of cortical bone of the femur in at least three locations and a co-axial forward section which extends forwardly from the rearward section, the fixture comprising:a rearward fixture component part for anchorage in the rearward section of the channel which is of such transverse dimensions as to extend to at least three cortical bone locations when anchored in the rearward section of the channel; and a forward fixture component part for anchorage in the forward section of the channel; wherein a forward end of the rearward fixture component part and a rearward end of the forward fixture component part are adapted to interlock when the fixture component parts are anchored in their respective sections of the channel and wherein securing means are provided for biasing the interlocking end of one of the fixture component parts transversely against the interlocking end of the other fixture component part to secure the forward and rearward fixture component parts together when the fixture component parts are anchored in their respective sections of the channel. 2. The fixture according to claim 1, wherein a recess is provided in the forward end of the rearward fixture component part for receipt of the rearward end of the forward fixture component part and wherein the securing means is adapted to bias the rearward end of the forward fixture component part transversely against a boundary wall of the recess when the fixture component parts are anchored in their respective sections of the channel.
TECHNICAL FIELD OF THE INVENTION The present invention relates to a hip joint prosthesis intended to be permanently anchored in the human hip joint and more specifically to the part of the hip prosthesis which is to be anchored in the femur or thigh bone of the patient and which comprises an attachment part for a ball unit designed to be anchored in the neck of a human femur (collum femoris), said attachment part comprising an elongate anchoring element or primary fixture intended to be inserted into a channel bored and extending through the femoral collum from the outside of the femur, and a secondary fixture intended to be attached to the collum after removal of the head of the collum, said primary fixture and said secondary fixture being provided with means for connecting said fixtures to each other.
BACKGROUND OF THE INVENTION The present invention is a development of a hip joint prosthesis of the kind disclosed in WO 89/11837. This document thus inter alia discloses a hip joint prosthesis comprising a primary fixture in the shape of a sleeve, said sleeve being intended to be inserted into a central hole bored longitudinally through the collum femoris from the outer side of the femur and a secondary fixture in the shape of a cap having a spherical shape intended to be attached to and cover the end of the collum femoris when the head of the collum has been removed partly or entirely and the outside of remaining end has been cut to a cylindrical shape. The primary and the secondary fixtures are interconnected by means of a bolt which at one end has an internal thread. The bolt is to be inserted into the sleeve and its internal thread is to be made to engage a central, threaded stud projecting from the spherical cap. When the bolt is tightened, the cap is pressed over the cylindrically cut shape of the end of the collum.
BRIEF DESCRIPTION OF THE INVENTIVE CONCEPT According to the invention a hip joint prosthesis of the kind described above is designed with the length of said primary fixture being chosen such that said primary fixture ends close to the head of the collum, said secondary fixture comprising a plug-like part intended to be inserted in a cylindrical countersunk cavity cut into the cancellous bone of the collum and extending to the cortical bone in at least three locations, the size of the secondary fixture being chosen such that the fixture abuts the cortical bone of the collum in at least said three locations.
BRIEF DESCRIPTION OF THE APPENDED DRAWINGS FIG. 1 illustrates a femur with the primary and the secondary fixture mounted, seen from the outside,
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION In FIGS. 1 and 2, which illustrate the prosthetic hip joint in an implanted state, 1 designates the primary fixture and 2 designates the secondary fixture. The primary fixture is in the form of a cylindrical main bolt 3 having a head 4, which preferably has a square shape, and a tubular end part 5 with a longitudinal bore. The tubular part 5 comprises an inner bore part 6 and and an outer bore part 7. The inner part 6 is provided with internal threads 8. The outer part 7 is provided with at least two longitudinal slits 9,9'. The inside 10 of the outer part 7 flares conically outwards. The internal threads 8 and the conically flaring part 10 are complementary to an attachment screw or bolt 11 having an externally threaded end part 12, a head 13 and a shaft 14 tapering conically from the head 13 towards the threaded part 12. The attachment bolt 11 is in engagement with the internal threads of the main bolt 3.
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CroffordFemoral neck fixation prosthesisUS6712855Nov 27, 2002Mar 30, 2004Biomet, Inc.Compliant tibial tray assemblyUS7104995 *Aug 9, 2004Sep 12, 2006Crofford Theodore WMethod of preparing an acetabulum for receiving a head of a femoral prosthesisUS7141073Mar 9, 2004Nov 28, 2006Biomet, Inc.Compliant fixation of external prosthesisUS7247171Mar 11, 2002Jul 24, 2007Sotereanos Nicholas GModular hip implantsUS7462199 *Sep 2, 2005Dec 9, 2008Medicinelodge, Inc.Methods for mounting a tibial condylar implantUS7476254Jan 5, 2006Jan 13, 2009Biomet Manufacturing CorporationCompliant fixation for pelvisUS7569075 *Aug 26, 2005Aug 4, 2009Johnson James FThrust plate hip prosthesisUS7641698 *Jun 4, 2004Jan 5, 2010Biomet Manufacturing Corp.Modular hip joint implantUS7670383May 4, 2004Mar 2, 2010Biomet Manufacturing Corp.Pubic catchUS7695474Sep 11, 2006Apr 13, 2010Howmedica Osteonics Corp.Method of preparing an acetabulum for receiving a head of a femoral prosthesisUS7722678Feb 9, 2006May 25, 2010Biomet Manufacturing Corp.Intramedullary compliant fixationUS7867280Jul 28, 2004Jan 11, 2011Zimmer, Inc.Methods for mounting and using tethered joint bearing implantsUS7879106 *Mar 25, 2003Feb 1, 2011Smith & Nephew, Inc.Hip joint prosthesisUS7922772Mar 11, 2004Apr 12, 2011Zimmer, Inc.Implants and related methods and apparatus for securing an implant on an articulating surface of an orthopedic jointUS8048166Mar 20, 2006Nov 1, 2011Biomet Manufacturing Corp.Method and apparatus for constructing a modular acetabulumUS8066779Dec 22, 2009Nov 29, 2011Biomet Manufacturing Corp.Modular hip joint implantUS8137389 *Nov 12, 2001Mar 20, 2012Biedermann Motech Gmbh & Co. KgBone screwUS8157867Jan 21, 2005Apr 17, 2012Zimmer, Inc.Trochlear groove implants and related methods and instrumentsUS8177852Sep 24, 2010May 15, 2012Smith & Nephew, Inc.Hip joint prosthesisUS8236060Jul 28, 2004Aug 7, 2012Zimmer, Inc.Tethered joint bearing implants and systemsUS8382762 *Jul 28, 2008Feb 26, 2013James K BrannonEndoscopic bone debridementUS8673018 *Feb 1, 2011Mar 18, 2014AMx Tek LLCMethods of using water-soluble inorganic compounds for implantsUS8795381 *May 14, 2012Aug 5, 2014Ihip Surgical, LlcMethods and systems for hip replacementUS8801799Jul 24, 2008Aug 12, 2014Howmedica Osteonics Corp.Femoral head prosthesisUS8808391May 7, 2012Aug 19, 2014T.J. Smith & Nephew, LimitedHip joint prosthesisUS20110196502 *Feb 1, 2011Aug 11, 2011Walls James AMethods of Using Water-Soluble Inorganic Compounds for ImplantsUS20120226361 *May 14, 2012Sep 6, 2012Ihip Surgical, LlcMethods and systems for hip replacementEP1726273A1 *May 24, 2005Nov 29, 2006Zimmer GmbHHip joint prosthesisWO2003086242A1 *Apr 7, 2003Oct 23, 2003Theodore CroffordFemoral neck fixation prosthesisWO2011005195A1 *Jul 12, 2010Jan 13, 2011Milux Holding S.A.Hip joint device, system and method* Cited by examinerClassifications U.S. Classification623/22.4, 606/65International ClassificationA61B17/88, A61B17/17, A61F2/36, A61B17/74, A61B17/80, A61F2/00, A61F2/46, A61B17/16Cooperative ClassificationA61B17/1668, A61F2002/30332, A61B17/8875, A61B17/1721, A61F2/3601, A61F2/3609, A61B17/175, A61F2002/365, A61F2002/4636, A61B17/746, A61F2220/0033, A61B17/1703, A61F2002/3631European ClassificationA61B17/17K, A61B17/74D4, A61F2/36C, A61B17/17B, A61B17/16S2F, A61F2/36ALegal EventsDateCodeEventDescriptionOct 31, 2006FPExpired due to failure to pay maintenance feeEffective date: 20060901Sep 1, 2006LAPSLapse for failure to pay maintenance feesMar 22, 2006REMIMaintenance fee reminder mailedMar 19, 2002REMIMaintenance fee reminder mailedFeb 25, 2002FPAYFee paymentYear of fee payment: 4Jul 6, 1999CCCertificate of correctionSep 13, 1994ASAssignmentOwner name: AKTIEBOLAGET ASTRA, SWEDENFree format text: CORRECTIVE ASSIGNMENT TO CORRECT ASSIGNEE S ADDRESS. AN ASSIGNMENT WAS PREVIOUSLY RECORDED AT REEL6973/FRAMES 677;ASSIGNORS:ALBREKTSSON, BJORN;JACOBSSON, MAGNUS;CARLSSON, LARS;AND OTHERS;REEL/FRAME:007136/0238;SIGNING DATES FROM 19940413 TO 19940414May 9, 1994ASAssignmentOwner name: AKTIEBOLAGET ASTRA, SWEDENFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ALBREKTSSON, BJORN;JACOBSSON, MAGNUS;CARLSSON, LARS;AND OTHERS;REEL/FRAME:006973/0677;SIGNING DATES FROM 19940413 TO 19940414RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services