|Publication number||US3806957 A|
|Publication date||Apr 30, 1974|
|Filing date||Mar 22, 1973|
|Priority date||May 4, 1972|
|Also published as||DE2320683A1|
|Publication number||US 3806957 A, US 3806957A, US-A-3806957, US3806957 A, US3806957A|
|Original Assignee||Y Shersher|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (78), Classifications (30)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Shersher 5] Apr. 30, 1974  ENDOPROSTHESIS OF THE PROXIMAL 3,102,536 9/1963 Rose et al. 128/92 CA PORnON OF THE FEMUR FOREIGN PATENTS OR APPLICATIONS  lnvemo" Isaevlch shershe" 1 2,015,324 11/1971 Germany 3/1 g y y pr z 3, W 124,585 0/1959 U.S.S.R 128/92 c Saratov, U.S.'S.R.  Filed; Mar. 22, 1973 Primary Examiner-Richard A. Gaudet Assistant ExaminerRonald I. Frinks  Appl 344032 Attorney, Agent, or Firm-Holman. & Stern  Foreign Application Priority Data  ABSTRACT M 4, 1972 U.S.S.R 1776052 ay An endoprosthesis of the proxImal port1on of the fe- 52 us. c1. 3/1 128/92 CA wherein a head and a neck are connected with a 51 Int. Cl. A61f 1/24 Shaft by means of a threaded For this PurP"Se Field of Search'm 3H. /9 C 9 CA 2 R the proximal end Of the shaft has a broadening part, /92 9 wherein a seat for a threaded split shank fitted on the I neck base is provided about the length of the neck 56] References Cited axis. The split shank is fixed by a lock for the trochanter major. Accordingly, the latter lock is elongated 2 8] 58 iz fi PATENTS 28/ 2 CA and broadens toward the end disposed inside the shaft.
,7 ,7 eva ier 9 3064.645 11/1962 Ficat et al. 128/92 CA 1 Claim, 2 Drawing Figures ENDOPROSTIIESIS OF THE PROXIMAL PORTION OF THE FEMUR The present invention relates to artificial joints employed in intra-articular prosthetic replacement, and more particularly to an endoprosthesis of the proximal portion of the femur. Such an endoprosthesis may be employed both independently and as part of an artificial hip-joint to restore mobility in the hip-joint lost due to Bekhterevs disease, arthritis deformans, arthritis infectiosa and aceptic necrosis of the femoral neck, as well as femoral neck fractures in the aged.
Known in the art is to employ an endoprosthesis of the proximal portion of the femur, comprising a head passing into a neck and also containing a shaft with a lock for the trochanter major.
In the known endoprosthesis the head and neck are permanently connected with the shaft. Hence, if the head is worn out or the neck is fractured, the whole endoprosthesis including the shaft must be removed.
Besides, the mentioned endoprosthesis does not provide for varying the neck length depending on the individual anatomy of different patients.
It is an object of the present invention to provide an endoprosthesis of the proximal portion of the femur, wherein the head and neck would be connected with the shaft by means of a detachable joint.
This object is accomplished by providing in an endoprosthesis of the proximal portion of the femur, comprising a head passing into a neck and a shaft wherein there is fixed a lock for the trochanter major, in which, in accordance with the present invention, the head and neck are connected with the shaft by means of a threaded joint, for which purpose the proximal end of the shaft has a broadened part, wherein a seat is provided about the axis of the neck to receive a threaded split shank fixed on the base of the neck, and the lock of the trochanter major is elongated and broadens toward the end thereof disposed inside the shaft, said lock simultaneously serving as a lock for the split shank of the neck.
The disclosed endoprosthesis of the proximal portion of the femur is advantageous in the sense that the head can be replaced, if need be, without taking the shaft from the medullary canal, and also that the neck may be elongated or shortened depending on the specific anatomy of different patients.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, wherein:
FIG. 1 is a general view (with cut-away segments) of an endoprosthesis of the proximal portion of the femur, in accordance with the invention;
FIG. 2 is a view of asplit shank in FIG. 1 taken along the arrow A.
I The endoprosthesis of the proximal portion of the femur shown in FIG. 1 comprises a head 1 passing into a neck 2 and a shaft 3 provided with fenestras 4 wherethrough burgeoning bony tissue can advance. The proximal end of the shaft 3 has a broadened part 5, wherein a seat 7 is drilled out along an axis 6 to receive a threaded split shank 8 fixed on the base of the neck Besides, in the broadened part 5 of the shaft 3 along an intertrochanteric axis 9 there is drilled out an orifice 10 wherein there is disposed a lock for the trochanter major, the latter lock being formed as a screw 1 l, with one end thereof disposed inside the boradened part 5 being elongated and broadened. The screw 11 and the shank 8 are so disposed relative to each other that the screw 11 passing through theslit of the shank 8 serves as a lock for the shank 8, preventing the neck 2 from self-unscrewing during the service of the prosthesis.
The screw 11 is locked by two nuts 12. Besides, the broadened part 5 has an opening 13 provided for the convenience of the operating surgeon.
FIG. 2 is a view of the split shank 8 taken along the arrow A showing the shape of the slit in the shank 8.
The proposed endoprosthesis of the proximal portion of the femur is assembled in the following manner.
The neck 2 is screwed into the seat 7 (FIG. 1). The screw 11 is led into the orifice l0, narrow end first in such a way that it should pass through the slit in the shank 8. After that the screw 11 is locked with two nuts 12, in which process the screw 11 is tightened and the shank 8 is securely locked against self-unscrewing.
What is claimed is:
1. An endoprosthesis of the proximal portion of the femur, comprising a head, said head extending into a neck having a base thereon, a shaft designed for being inserted into the femoral medullary canal, said shaft having a proximal end defining a broadened part, a seat formed in said broadened part along the axis of said neck, a threaded split shank fixed on the base of said neck, a threaded joint connecting said neck with said shaft by screwing said split shank into said seat, a lock for the trochanter major having one end disposed in said broadened part of said shaft, said end of said lock for the trochanter major being elongated and broadened for the purpose of locking said split shank.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2781758 *||Jan 24, 1955||Feb 19, 1957||Chevalier Michel Jacques||Artificial femoral head|
|US3064645 *||Jan 15, 1962||Nov 20, 1962||Raymond P Ficat||Damped prosthesis forming a substitute for the coxo-femoral articulation|
|US3102536 *||Dec 7, 1960||Sep 3, 1963||Robert M Rose||Hip prosthesis|
|DE2015324A1 *||Mar 31, 1970||Nov 4, 1971||Title not available|
|SU124585A1 *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3995323 *||Oct 20, 1975||Dec 7, 1976||Yakov Isaevich Shersher||Method of preparing bone endoprosthesis model and endoprosthesis of proximal femur prepared with the aid of said model|
|US4115875 *||Apr 19, 1977||Sep 26, 1978||Andre Rambert||Hip prosthesis|
|US4404691 *||Feb 25, 1981||Sep 20, 1983||Howmedica International Inc.||Modular prosthesis assembly|
|US4488319 *||Oct 26, 1981||Dec 18, 1984||Clemson University||Method of two-stage implantation of a joint prosthesis and prosthetic product|
|US4578081 *||May 24, 1982||Mar 25, 1986||Howmedica International, Inc.||Bone prosthesis|
|US5080685 *||May 25, 1990||Jan 14, 1992||Boehringer Mannheim Corporation||Modular hip prosthesis|
|US5181928 *||Dec 13, 1989||Jan 26, 1993||Boehringer Mannheim Corporation||Modular hip prosthesis|
|US5211666 *||Apr 22, 1991||May 18, 1993||New York University||Hip joint femoral component endoprosthesis with a lateral load-transferring support surface|
|US5286260 *||May 29, 1992||Feb 15, 1994||Depuy Inc.||Modular hip prosthesis|
|US5314479 *||Nov 18, 1991||May 24, 1994||Depuy Inc.||Modular prosthesis|
|US5342366 *||Feb 19, 1992||Aug 30, 1994||Biomet, Inc.||Surgical instruments for hip revision|
|US5370698 *||May 18, 1993||Dec 6, 1994||Clemson University||Isoelastic implants with improved anchorage means|
|US5370706 *||Aug 13, 1993||Dec 6, 1994||Depuy Inc.||Modular hip prosthesis|
|US5658340 *||Aug 16, 1994||Aug 19, 1997||Howmedica Gmbh||Endoprosthesis for a shoulder joint|
|US5800553 *||Jul 4, 1992||Sep 1, 1998||Aktiebolaget Astra||Hip joint prosthesis to be permanently anchored within a femur of a patient|
|US5961555 *||Mar 17, 1998||Oct 5, 1999||Huebner; Randall J.||Modular shoulder prosthesis|
|US5976189 *||Mar 24, 1998||Nov 2, 1999||Waldemar Link (Gmbh & Co)||Assembly comprising a joint endoprosthesis|
|US6102953 *||Nov 13, 1998||Aug 15, 2000||Acumed, Inc.||Shoulder prosthesis|
|US6168627||Jan 18, 2000||Jan 2, 2001||Acumed, Inc.||Shoulder prosthesis|
|US6168628||Jan 18, 2000||Jan 2, 2001||Acumed, Inc.||Shoulder Prosthesis|
|US6193758||Oct 2, 1998||Feb 27, 2001||Acumed, Inc.||Shoulder prosthesis|
|US6440171||Feb 27, 2001||Aug 27, 2002||Hammill Manuf. Co.||Double D key locking prosthesis|
|US6494913||Feb 18, 2000||Dec 17, 2002||Acumed, Inc.||Shoulder prosthesis|
|US6866683||Dec 13, 2002||Mar 15, 2005||Medicine Lodge, Inc.||Modular implant for joint reconstruction and method of use|
|US6875239||Apr 25, 2002||Apr 5, 2005||Medicinelodge, Inc.||Modular prosthesis for replacing bone and method|
|US6887276||Dec 13, 2002||May 3, 2005||Medicine Lodge, Inc||Modular implant for joint reconstruction and method of use|
|US6902583||Apr 25, 2002||Jun 7, 2005||Medicinelodge, Inc.||Tripartite attachment mechanism and method for a modular prosthesis|
|US7033399||Aug 22, 2003||Apr 25, 2006||Ortho Innovations, Inc.||Welded hip prosthesis|
|US7297163||Dec 16, 2002||Nov 20, 2007||Acumed Llc||Shoulder prosthesis|
|US7537618||Nov 13, 2006||May 26, 2009||Howmedica Osteonics Corp.||Modular humeral head|
|US7785370||Apr 10, 2009||Aug 31, 2010||Howmedica Osteonics Corp.||Modular humeral head|
|US7785371||Apr 10, 2009||Aug 31, 2010||Howmedica Osteonics Corp.||Modular humeral head|
|US7857858||Jan 19, 2007||Dec 28, 2010||Zimmer Technology, Inc.||Modular bone implant, tool, and method|
|US7918892||Nov 19, 2007||Apr 5, 2011||Acumed Llc||Shoulder prosthesis|
|US8029573||Dec 7, 2006||Oct 4, 2011||Ihip Surgical, Llc||Method and apparatus for total hip replacement|
|US8092466||Mar 17, 2009||Jan 10, 2012||Howmedica Osteonics Corp.||Expandable reverse shoulder trial|
|US8110005||Feb 7, 2012||Biomet Manufacturing Corp.||Modular prosthesis and use thereof for replacing a radial head|
|US8114163||Nov 29, 2004||Feb 14, 2012||Biomet Manufacturing Corp.||Method and apparatus for adjusting height and angle for a radial head|
|US8211183||Mar 16, 2011||Jul 3, 2012||Ihip Surgical, Llc||Methods and systems for total hip replacement|
|US8241367||Nov 22, 2010||Aug 14, 2012||Zimmer, Inc.||Modular bone implant, tool, and method|
|US8257363||Oct 12, 2007||Sep 4, 2012||Howmedica Osteonics Corp.||Expandable reverse shoulder trial|
|US8366781||Feb 5, 2013||Biomet Manufacturing Corp.||Modular prosthesis and use thereof for replacing a radial head|
|US8425615||Oct 13, 2009||Apr 23, 2013||Biomet Manufacturing Corp.||Method and apparatus for adjusting height and angle for a radial head|
|US8535382||Dec 13, 2011||Sep 17, 2013||Biomet Manufacturing, Llc||Modular radial head prostheses|
|US8545511||Aug 20, 2012||Oct 1, 2013||Howmedica Osteonics Corp.||Expandable reverse shoulder trial|
|US8579985||Dec 22, 2011||Nov 12, 2013||Ihip Surgical, Llc||Method and apparatus for hip replacement|
|US8663334||May 31, 2012||Mar 4, 2014||Howmedica Osteonics Corp.||Lateral entry insert for cup trial|
|US8795381||May 14, 2012||Aug 5, 2014||Ihip Surgical, Llc||Methods and systems for hip replacement|
|US8858641||Nov 28, 2012||Oct 14, 2014||Howmedica Osteonics Corp.||Lateral entry insert for cup trial|
|US8906102||Feb 14, 2013||Dec 9, 2014||Howmedica Osteonics Corp.||Lateral entry insert for cup trial|
|US8920509||Jun 4, 2010||Dec 30, 2014||Biomet Manufacturing, Llc||Modular radial head prosthesis|
|US8974540||Mar 12, 2013||Mar 10, 2015||Ihip Surgical, Llc||Method and apparatus for attachment in a modular hip replacement or fracture fixation device|
|US9237949||Nov 11, 2013||Jan 19, 2016||Ihip Surgical, Llc||Method and apparatus for hip replacement|
|US20030204266 *||Apr 25, 2002||Oct 30, 2003||Medicinelodge, Inc.||Modular prosthesis for replacing bone and method|
|US20030204268 *||Apr 25, 2002||Oct 30, 2003||Medicinelodge, Inc.||Binary attachment mechanism and method for a modular prosthesis|
|US20040117024 *||Dec 13, 2002||Jun 17, 2004||Gerbec Daniel E.||Modular implant for joint reconstruction and method of use|
|US20050027295 *||Aug 1, 2003||Feb 3, 2005||Yang Lin Min||Interlocking nail|
|US20050043811 *||Aug 22, 2003||Feb 24, 2005||Doubler Robert L.||Welded hip prosthesis|
|US20050075735 *||Nov 29, 2004||Apr 7, 2005||Berelsman Brian K.||Method and apparatus for adjusting height and angle for a radial head|
|US20060052877 *||Aug 22, 2003||Mar 9, 2006||Doubler Robert L||Welded hip prosthesis|
|US20080114461 *||Nov 13, 2006||May 15, 2008||Howmedica Osteonics Corp.||Modular humeral head|
|US20080140210 *||Sep 1, 2006||Jun 12, 2008||Doubler Robert L||Modular shoulder prosthesis|
|US20080140211 *||Sep 1, 2006||Jun 12, 2008||Doubler Robert L||Modular shoulder prosthesis with load bearing surface|
|US20080306600 *||Nov 19, 2007||Dec 11, 2008||Huebner Randall J||Shoulder prosthesis|
|US20090099662 *||Oct 12, 2007||Apr 16, 2009||Howmedica Osteonics Corp.||Expandable reverse shoulder trial|
|US20090192623 *||Apr 10, 2009||Jul 30, 2009||Howmedica Osteonics Corp.||Modular humeral head|
|US20090192624 *||Apr 10, 2009||Jul 30, 2009||Howmedica Osteonics Corp.||Modular humeral head|
|US20090216332 *||Mar 17, 2009||Aug 27, 2009||Howmedica Osteonics Corp.||Expandable reverse shoulder trial|
|US20100030339 *||Oct 13, 2009||Feb 4, 2010||Biomet Manufacturing Corp.||Method and apparatus for adjusting height and angle for a radial head|
|US20100241236 *||Sep 23, 2010||Biomet Manufacturing Corp.||Modular Radial Head Prosthesis|
|US20100262252 *||Jun 30, 2010||Oct 14, 2010||Biomet Manufacturing Corp.||Modular prosthesis and use thereof for replacing a radial head|
|US20100312349 *||Aug 31, 2010||Dec 9, 2010||Biomet Manufacturing Corp.||Modular prosthesis and use thereof for replacing a radial head|
|US20110066249 *||Nov 22, 2010||Mar 17, 2011||Zimmer Technology, Inc.||Modular bone implant, tool, and method|
|US20110125276 *||May 26, 2011||Biomet Manufacturing Corp.||Modular prosthesis and use thereof for replacing a radial head|
|US20110144759 *||Jun 16, 2011||Biomet Manufacturing Corp.||Modular prosthesis and use thereof for replacing a radial head|
|US20110166665 *||Jul 7, 2011||Anatol Podolsky||Methods and systems for total hip replacement|
|US20110196491 *||Aug 11, 2011||Acumed Llc||Bone prosthesis|
|US20140128986 *||Nov 6, 2013||May 8, 2014||Ihip Surgical, Llc||Monoblock head and neck unit for total hip replacement|
|International Classification||A61F2/36, A61F2/46, A61F2/30, A61F2/00|
|Cooperative Classification||A61F2002/3631, A61F2002/30322, A61F2002/3611, A61F2002/30492, A61F2002/3652, A61F2002/3625, A61F2/3676, A61F2002/30332, A61F2002/30787, A61F2002/30785, A61F2/36, A61F2002/30789, A61F2002/30405, A61F2002/30594, A61F2002/368, A61F2002/3682, A61F2250/0026, A61F2002/3684, A61F2/367, A61F2/4607, A61F2220/0025, A61F2220/0033, A61F2002/3627, A61F2002/30512|