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Publication numberUS3466670 A
Publication typeGrant
Publication dateSep 16, 1969
Filing dateMay 24, 1966
Priority dateMay 26, 1965
Also published asDE1541246B1
Publication numberUS 3466670 A, US 3466670A, US-A-3466670, US3466670 A, US3466670A
InventorsTor Christiansen
Original AssigneeTor Christiansen
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hip-joint prosthesis
US 3466670 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

16 1969 T. c-IRls'rlANsN y l 3,466,670

arr-JOINT PnosTaEsIs Filed may 24. 196e United States Patent O 3,466,670 HIP-JOINT PROSTHESIS Tor Christiansen, Kongsberg Sykehus, Kongsberg, Norway Filed May 24, 1966, Ser. No. 552,578 Claims priority, application; Norway, May 26, 1965, 158 43 Inf. Cl. A61f1/02, 5/04 U.S. Cl. 3-1 4 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to a hip-joint prosthesis of the kind consisting of a capitulum engaging the socket of the pelvis and a spindle portion connected thereto for insertion into the medullary cavity in the thigh-bone shaft. Such hip-joint prostheses have previously been manufactured as a unitary metal member made from a noncorrosive material. The capitulum has then been ballshaped with a polished surface adapted for sliding against the socket of the pelvis.

These previously known prostheses have several disadvantages. First of all the capitulum, after being used for instance, for a few years, will have a tendency to wear down the socket of the pelvis so that the capitulum penetrates therethrough incapacitating the patient in the absence of further and more drastic surgery.

Secondly, the known prostheses are very heavy, being made of solid material. Thirdly, the placing of the prosthesis by operation necessitates a rather large incision to enable the prosthesis to be placed between the upper end of the thigh-bone shaft and the socket of the pelvis.

Fourthly, these known prostheses give the patient much pain both in getting used to the prosthesis when using the leg after the insertion of the prosthesis, and later on.

The invention has for its object to provide a hip-joint prosthesis whiclr eliminates the above-mentioned disadvantages. A prosthesis according to the invention can thus be placed by making only a considerably reduced incision during the operation. 'Ihe patient has less pain, and the prosthesis is made less heavy than the known prostheses. A prosthesis according to the invention is also easier to position correctly and results in better mobility for the leg after the operation.

To obtain the above-mentioned advantages it is proposed, according to the invention, to provide a hip-joint prosthesis of the above-mentioned kind, the characterizing feature of which is that an articulation is permitted between the capitulum and the spindle portion. Said capitulum is substantially dismountable, and this makes it possible to employ a smaller incision to install the prosthesis in its proper position, the spindle portion being rst inserted in position in the medullary cavity in the high-bone shaft, after which the capitulum with appurtenant articulation is installed.

According to a preferred embodiment the capitulum consists of a convenient non-corrosive artificial material, for instance, tetratluorpolyethylene, which, is known,


is self-lubricating and thus will present a favorable surface to the co-operating metal element projecting from the spindle portion of the prosthesis.

The above, as well as further characterizing features and advantages of the invention, will appear more clearly from the succeeding detailed specification of an embodiment shown on the drawing of a hip-joint prosthesis according to the invention. It is, however, pointed out that the invention shown and described is meant only to illustrate the inventive idea, and that this can be modified in several ways within the scope of the invention. Especially, the articulation between the capitulum and the spindle portion can be modied in several ways known per se, without departing from the basic idea of the invention.

On the drawing, 1 is the spindle portion of the prosthesis shaped in a manner known per se to be inserted into the medullary cavity in the thigh-bone shaft after the upper articular ball of the thigh-bone is removed, and the top edge of the thigh-bone shaft is suitably formed to give good support for a contact edge 4 arranged at the upper end of the spindle. The spindle portion is made from a convenient non-corrosive metal and can be provided with lightening holes 2 as well as a guide rib 3 for better localization in the medullary cavity.

In the example shown a cylindrical trunnion 5 is arranged level with the upper end of the spindle portion. Said trunnion 5 co-operates with a cylindrical aperture 6' in the capitulum 6, which is substantially spherical. The capitulum 6 is preferably made of tetrafluorpolyethylene or other suitable artificial material which can be exposed to the body liquids, and which provides a self-lubricating effect in engagement with the trunnion 5.

To prevent the body liquids from seeping between the co-operating surfaces 5, 6', an O-ring seal 8 may be employed near the inner end of the trunnion.

The above-mentioned previously known hip-joint prostheses were provided with a capitulum, level with the spindle portion and adapted for direct movable engagement with the socket of the pelvis. The capitulum was therefore substantially arranged in the extension of the spindle portion. The capitulum according to the invention is, however, arranged so that its y axis forms an angle a with the principal x axis. Said angle is at least 45 when it relates to a trunnion as shown on the drawing, and preferably approximately 65. On account of this angle a, the movement of the leg, which is transferred to the spindle portion 1, will not be apt to move the ball-shaped capitulum 6, so that this obtains a more or less permanent engagement position with the socket of the pelvis. The trunnion connections 5, 6 will receive the movement, and the socket of the pelvis is not exposed to any wear and tear effect, so that the above-mentioned danger of penetration is eliminated.

Because the capitulum 6, according to the invention, is preferably made of self-lubricating plastic material,

` the weight of the prosthesis is also considerably reduced,

the previously known metal capitulum having had a weight between three and four times as great as that of the capitulum of articial material according to the invention.

Also, because the capitulum 6 and the spindle portion 1 are produced as two separate but unitable parts, the incision made during the operation can be much reduced in length, the surgeon first inserting the spindle portion 1 and then mounting the capitulum 6. Said insertion of the spindle portion is further facilitated by the upper end thereof being provided -with a groove 7 or the like, suitable for co-operation with convenient tools for applying the necessary insertion force.

As mentioned, the invention is not limited to the shown and described details, but can be modified in several ways without departing from the inventive idea. Thus, the shown and described trunnion can be replaced by another suitable trunnion connection, for instance, a ball-and-socket joint, if convenient with limited engagement surfaces for possible mutual movement between the parts. Locking members between the capitulum and the spindle portion are normally not necessary, these parts being kept in place by muscular exertion. If, however, a trunnion connection not expected to be kept in place by normal muscular exertion is used, suitable lock: ing members will also form a part of the prosthesis.

What is claimed is:

1. Hip-joint prosthesis comprising:

a self-lubricating Wholly plastic capitulum designed for fixed engagement in the socket of the pelvis, said capitulum having a bore therein;

a spindle portion for insertion into the medullary cavity in the thigh-bone shaft;

an integral trunnion on the upper end of said spindle rotatably inserted within the bore of said capitulum for removably mounting said capitulum on said spindle; and

a sealing means on said trunnion in contact with the wall of said capitulum bore to prevent entry of body fluids within said bore, said trunnion extending laterally away from said spindle and forming an upper included angle therewith of at least 45 whereby all movements between the leg and the hip are substantially taken up by said trunnion as it rotates within the self-lubricating bore of said capitulum.

2. Hip-joint prosthesis according to claim 1 character- References Cited UNITED STATES PATENTS 2,612,159 9/ 1952 Collison. 3,064,645 11/1962 Ficat et al. 3,320,951 5/1967 Wittebol.

FOREIGN PATENTS 1,122,634 5/ 1956 France.

OTHER REFERENCES Modified Scuderi Hip Prosthesis, in The Journal of Bone and Joint Surgery, June 1955, advertising page 42.

De Puy Hip Prosthesis, in The Journal of Bone and Joint Surgery, vol. -A, No. 6, September 1963, advertising page 61.

RICHARD A. GAUDET, Primary Examiner RONALD L. FRINKS, Assistant Examiner U.S. Cl. X.R. 128-92

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2612159 *Mar 1, 1949Sep 30, 1952Marie B CollisonTrochanteric plate for bone surgery
US3064645 *Jan 15, 1962Nov 20, 1962Raymond P FicatDamped prosthesis forming a substitute for the coxo-femoral articulation
US3320951 *Dec 7, 1964May 23, 1967Wittebol PaulIntramedullary prostheses
FR1122634A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3658056 *Apr 21, 1969Apr 25, 1972Arnold H HugglerHip joint prosthesis
US3685058 *Oct 19, 1970Aug 22, 1972Raymond G TronzoHip prosthesis
US3723995 *May 19, 1970Apr 3, 1973Osteo AgProsthetic hip enarthrosis
US3808606 *Mar 19, 1973May 7, 1974R TronzoBone implant with porous exterior surface
US3889299 *Jan 7, 1974Jun 17, 1975Nat Res DevProsthetic hip joint devices
US3896505 *Aug 20, 1973Jul 29, 1975Franz Donatus TimmermansEndoprosthesis for the hipjoint
US4021865 *Aug 14, 1975May 10, 1977John CharnleyFemoral prosthesis
US4068324 *Jan 19, 1977Jan 17, 1978Bio-Dynamics Inc.Platform supported hip prosthesis
US4266302 *Oct 2, 1979May 12, 1981Etablissements TornierFemoral pin for hip prosthesis
US4287617 *Oct 2, 1979Sep 8, 1981Etablissements TornierFemoral pin for hip prosthesis
US4661112 *Mar 4, 1985Apr 28, 1987Sulzer Brothers LimitedHip joint prosthesis
US5030238 *Mar 28, 1988Jul 9, 1991Gmt Gesellschaft Fur Medizinische Technik MbhHip prosthesis
US5258035 *May 29, 1992Nov 2, 1993Intermedics Orthopedics, Inc.Femoral prosthesis with wedge having opposed tapers
US5330536 *Dec 14, 1990Jul 19, 1994Howmedica GmbhFemur portion of a hip
US5480452 *Oct 21, 1993Jan 2, 1996Intermedics Orthopedics, Inc.Femoral prosthesis with wedge having opposed tapers
US5755811 *Apr 4, 1997May 26, 1998Zimmer, Inc.Prosthetic implant with fins
US6190417 *Jul 19, 1999Feb 20, 2001Kyocera CorporationFemoral prosthesis device
US8029573Dec 7, 2006Oct 4, 2011Ihip Surgical, LlcMethod and apparatus for total hip replacement
US8052755 *Nov 8, 2011Remi Sciences, Inc.Ulnar head prosthesis system
US8211183Mar 16, 2011Jul 3, 2012Ihip Surgical, LlcMethods and systems for total hip replacement
US8579985Dec 22, 2011Nov 12, 2013Ihip Surgical, LlcMethod and apparatus for hip replacement
US8795381May 14, 2012Aug 5, 2014Ihip Surgical, LlcMethods and systems for hip replacement
US8840676 *May 7, 2010Sep 23, 2014Smith & Nephew, Inc.Modular trial heads for a prosthetic
US8974540 *Mar 12, 2013Mar 10, 2015Ihip Surgical, LlcMethod and apparatus for attachment in a modular hip replacement or fracture fixation device
US9237949Nov 11, 2013Jan 19, 2016Ihip Surgical, LlcMethod and apparatus for hip replacement
US20120239160 *May 7, 2010Sep 20, 2012Smith & Nephew, Inc.Modular trial heads for a prosthetic
US20130204390 *Mar 12, 2013Aug 8, 2013Ihip Surgical, LlcMethod and apparatus for attachment in a modular hip replacement or fracture fixation device
US20150342745 *May 27, 2015Dec 3, 2015Stryker European Holdings I, LlcMetacarpal rod anchor for a trapezometacarpal prosthesis
EP0193681A2 *Dec 20, 1985Sep 10, 1986Chas F Thackray LimitedJoint prostheses
EP0555629A1 *Jan 7, 1993Aug 18, 1993Howmedica GmbHA femoral member of a hip joint endoprosthesis
U.S. Classification623/22.43
International ClassificationA61F2/00, A61F2/32, A61F2/36, A61F2/30
Cooperative ClassificationA61F2220/0033, A61F2002/30354, A61F2002/30591, A61F2002/30785, A61F2002/365, A61F2002/3266, A61F2/36, A61F2002/3631, A61F2002/3668, A61F2002/368, A61F2/367
European ClassificationA61F2/36