US3715763A - Artificial limb for the knee joint - Google Patents

Artificial limb for the knee joint Download PDF

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US3715763A
US3715763A US3715763DA US3715763A US 3715763 A US3715763 A US 3715763A US 3715763D A US3715763D A US 3715763DA US 3715763 A US3715763 A US 3715763A
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material
rigid member
strip
knee joint
bone
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W Link
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/38Joints for elbows or knees
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/38Joints for elbows or knees
    • A61F2002/3895Joints for elbows or knees unicompartimental

Abstract

An artificial limb particularly suitable for the knee joint of a human being consisting of at least two coacting inserts or implants, which are anchored to the end of the thigh bone and the shin bone. The insert on the thigh bone is a cup-shaped surface and the insert on the shin bone is formed like a block to provide a free supporting face for contact by the surface of the cupshaped insert.

Description

United States Patent [191 u 11' 3,715,763 4 Link I [45] Feb. 13, 1973 I54] ARTIFICIAL LIMB FOR THE KNEE FOREIGN PATENTS OR APPLICATIONS JOINT 923,383 2/1955 Germany .128/92 CA [76] Inventor: Waldemar Link, 13 Fuhlsbuttler Str. P E I h d A G d 402404 H b G i rlmary xammerc at au et am urg ermany Assistant Examiner-Ronald L. Fzrinks Flledi April 1, 1971 Attorney-Allison C. Collard [21] Appl. No.: 136,082 ABSTRACT I I An artificial limb particularly suitable for the knee [52] US. Cl. ..3/I, 128/92 C joint of a hum-an being consisting of at least two coact [51] Int. Cl. ..A6lf 1/24 in insert or implants, which are anchored to the end g [58] Field of Search ..3/1; 128/92 C, 92 CA, 92 R of the thigh bone and the shin bone. The insert on the i thigh bone is a cup-shaped surface and the insert on 5 References m the shin bone is formed like a block to provide a free supporting face for contact by the surface of the cup- UNITED STATES PATENTS shaped insert. 2,719,522 10/1955 Hudack ..128/92 CA 3 Claims, 4 Drawing Figures PAIENIEDFEB 131915 lnyen far 1'! A LDENAR LIN ARTIFICIAL LIMB FOR THE KNEE JOINT The present invention relates to a prosthesis and in particular to a partial prosthesis or artificial limb for the knee joint of a human being. 1

Different sicknesses in the region of the knee joint, like osteopro'sis, polyarthritis, and sickness which usually follows single or double fractures of the shin bone (tibia), or fractures of the condyles, may cause chronic changes and destruction, or partial destruction of the bone tissue, thus requiring the usage of a prosthesis or artificial limb. When complicated fractures occur, for instance, when the medial and/or the lateral tibia plateau is substantially destroyed, that is, the inner or outer bearing face of the shin bone is damaged, the knee joint is usually amputated and replaced by an artificial knee joint. This total amputation of the'knee joint is used also in cases of arthrosis or polyarthritis, that is, in cases where a total amputation of the knee joint is not usually required, but is carried out nonetheless, because of lack of a better solution. It should be noted that in such cases the shape of the joint heads are substantially or completely intact. when there is a total replacement of the human knee joint, the artificial joint has a lot of disadvantages. An artificial replacement of the natural knee joint constitutes a rather large implant with respect to the surrounding natural soft tissue which encompass the'implant, and may cause injuries after the healing process. Furthermore, experience has shown that wound infections easily occur. Moreover, conventional artificial knee joints do not accommodate the normal anatomic structure of a natural knee joint. It should be noted that the known artificial knee joints are constructed like hinges and do not permit a lateral movement of the knee joint.

Thin intermediary metal bodies between the joint faces of the bones have been implanted to permit better freedom of movement in cases of arthrosis. However, these implants of metal bodies or plates in the bones cannot be secured satisfactorily. On the one hand, it is preferable to implant such intermediary bodies, due to the minor operation required, opposite to a total replacement of the natural knee joint. However, the degree of success in these types of operations is rather low.

Accordingly, the subject invention provides a prosthesis or artificial limb for the natural knee joint in a human being wherein the aforementioned disadvantages do not occur. The prosthesis to be implanted should be as small as possible in its measurements, so that only a comparatively low amount of bone tissue substance has to be removed, so as to prevent the above mentioned disadvantages associated with a larger implant. It should be noted that the smaller implant of the'artificial knee joint should be designed so that it does not cause a loss in stability and function. Moreover, the stability and function of the knee joint is improved so that the natural construction of a knee joint is substantially maintained.

In the invention, the subject prosthesis consists of at least two cooperating inserts or implants. One of the inserts or implants is mounted on the head of one of the shin bones in the form of a cup which assumes the curve of the head of the joint. The other insert or implant is mounted on the head of the other shin bone having a freely exposed support face to receive the first mentioned cup shaped insert or implant. It is to be unengagement with the other insert to provide a favorable rolling action corresponding to the formation of the natural shin bone condyles. In contrast to the conventional artificial knee joints, wherein the artificial joint heads are linked together by means of hinges, the two opposite inserts or implants of the subject invention are not positively locked, but are independent of each other.

In order to obtain satisfactory walking conditions and favorable friction conditions, the inserts or implants are produced of alloplastic material, in accordance with the invention. In practice, it has been shown that it is rather advantageous if one of the inserts consists of a suitable metal, and the other insert is made of a suitable plastic. Such a combination has a favorable effect on the natural surrounding tissue and a minimum of abrasion. A further advantage is that the plastic material insert is relatively elastic. which enables it to conserve the kinetic or pressure energy which acts on the joint as potential energy.

In a preferred embodiment of the invention, the cup shaped insert consists of metal, and the block-like insert consists of an elastic, plastic material. A suitable metal material is a refined steel with, for example, a chrome or nickel on a molybdenium base. A suitable plastic material is, for example, a high molecular polyethylene material. However, it is to be understood that other equivalent suitable materials may be used. In order to obtain a favorable friction and abrasion factor, it is recommended that one of the insert surfaces be highly polished. In order to fixedly anchor the insert in the bones, protrusions are provided on the inside of these inserts. The securing of the inserts is carried out by using a suitable bone cement. A number of certain acrylic resins are commercially available for use as bone cement.

It is therefore an object of the present invention to provide an artificial limb having two coacting inserts secured to the thigh bone and the shin bone which permit greater freedom of movement than conventional devices.

It is another object of the invention to provide an artificial limb which is simple in design, easy to manufacture, and reliable in operation.

Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawing which discloses the embodiments of the invention. It is to be understood, however, that the drawing is designed for the purpose of illustration only, and not as a definition of the limits of the invention.

In the drawing, wherein similar reference characters denote similar elements throughoutthe several views:

FIG. 1 is a perspective view of a. cup shaped insert or implant for the thigh bone according to the invention,

FIG. 2 is a perspective viewof a block-like: insert made of plastic material for a shin lbone,

FIG. 3 is a schematic side view of the joint heads of the thigh bone andthe shin bone with the implanted artificial inserts; and,

FIG. 4 shows a schematic front view of the arrangement shown in FIG. 3.

Referring to the drawings, there is shown a thigh bone (femur) l, and a shin bone (tibia) 2, and the associated condyles 3 and 4 and the condyles 5 and 6 of the thigh bone (femur) and shin bone (tibia), respectively. As can be seen in FIG. 1, an insert or implant 7 is anchored in the joint head of thigh bone (femur) 1 in the medial condyl 3, as well as in the lateral condyl 4. Accordingly, as can be seen from FIG. 2, an insert or implant 8 is anchored in the joint head of the shin bone (tibia) in the medial condyl 5 and the lateral condyl 6. The cast cup shaped insert or implant 7 consist of high austenic refined steel which is highly polished on its outside surface. The cup is about 20-mm wide and 3- mm thick. The curve of the cup shaped insert or implant conforms to the natural curve of condyls 3 and 4. While the outside 9 of cup shaped implant 7 is curved at all sides, forming almost an arc, because the cup is bent in a right angle with respect to the aforementioned curve, the inside 11 of the cup shaped implant has only a curve corresponding to the natural bone. Protruding shoulders l2, l3, and 13' are provided on inside 11 for fixedly anchoring implant 7 to the natural bone. Grooves 14 are provided on the rod like shoulders 12 facilitating the anchoring of the shoulders to the natural bone, whereby the grooves are arranged laterally with respect 'to the longitudinal axis of the rodlike shoulders. The low shoulders are formed as either ribs 13 or earns 13'.

The implant 8 shown in FIG. 2 consists of high polymer polyethylene. The supporting face 16 is flat and coacts with the" outer surface 9 of implant 7. The supporting face is about 4 cm long and 2 cm wide, and corresponds to about the half of the load face of a shin bone condyl of a large knee joint. If these dimensions are too big for a smaller knee joint, the block may be reduced, intraoperative, without any difficulties. The side faces 17 of the implant 8 are in an acute angle with respect to supporting face 16. An anchoring bar 18 is mounted on the inside of implant 8, which is directed toward the shin bone (tibia) 2. To facilitate the anchoring, anchoring bar 18 is provided with grooves 19. A groove 21 is provided between anchoring bar 18 and the supporting face 16 which guarantees a secure mechanical anchoring.

Implants 7 and 8 are cemented into the natural bones with acrylic resin bone cement, after the knee joint is opened and the cartilage is removed, and the anchoring holes are milled into the natural bones for shoulders l2, 13, 13' and 18. This operation should be carried out in the extreme bending position of the knee joint. Before the bone cement hardens, the knee should be brought into its extreme horizontal position, in order to take care of eventual corrections, and to check the relative position of implants 7 and 8, with respect to each other.

It should be understood that if there is a lesser degree of damage to the knee joint, only one implant 7 or 8 may be implanted together with its associated condyl 3, 5, or 4, 6, respectively. The inventive prosthesis may also be used in so called crushed fractures of the knee joint, as long as the ligaments are still intact. The particular advantage of subject invention resides in the fact that the implant is rather small and light, and that the implant is not surrounded by soft tissue, but is maintained in the bone tissue.

- In accordance with the invention, the prosthesis perthat many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.

What is claimed is:

1. An artificial limb for the knee joint of a human be-- ing, comprising:

a first rigid member, including a curved strip of material, having a plurality of radially inwardly extending fastening members integrally formed therewith disposed on the inside surface of said strip of material, at least two of said fastening members having a tapered rectangular shape and a plurality of parallel peripheral grooves spaced apart along the length thereof; and i a second rigid member, comprising a tapered block of material having a planar upper surface engaging the outer surface of said curved strip of material, and a peripheral groove disposed between the upper and lower surfaces thereof,

whereby at least one first rigid member is adapted to be fastened to the condyl of the thigh bone, and at least one second rigid member is adapted to be fastened to the tibia of the shin bone, so that said curved strip of material of said first rigid member engages the top planar surface of said second rigid member in point contact therewith.

2. The artificial limb as recited in claim 1, wherein said fastening members disposed on the inside surface of said strip of material include a plurality of elongated parallel rib members, integrally formed with said strip of material.

3. The artificial limb as recited in claim 2, wherein said curved strip of material is constructed of metal, and said second rigid member is constructed of plastic material.

Claims (3)

1. An artificial limb for the knee joint of a human being, comprising: a first rigid member, including a curved strip of material, having a plurality of radially inwardly extending fastening members integrally formed therewith disposed on the inside surface of said strip of material, at least two of said fastening members having a tapered rectangular shape and a plurality of parallel peripheral grooves spaced apart along the length thereof; and a second rigid member, comprising a tapered block of material having a planar upper surface engaging the outer surface of said curved strip of material, and a peripheral groove disposed between the upper and lower surfaces thereof, whereby at least one first rigid member is adapted to be fastened to the condyl of the thigh bone, and at least one second rigid member is adapted to be fastened to the tibia of the shin bone, so that said curved strip of material of said first rigid member engages the top planar surface of said second rigid member in point contact therewith.
1. An artificial limb for the knee joint of a human being, comprising: a first rigid member, including a curved strip of material, having a plurality of radially inwardly extending fastening members integrally formed therewith disposed on the inside surface of said strip of material, at least two of said fastening members having a tapered rectangular shape and a plurality of parallel peripheral grooves spaced apart along the length thereof; and a second rigid member, comprising a tapered block of material having a planar upper surface engaging the outer surface of said curved strip of material, and a peripheral groove disposed between the upper and lower surfaces thereof, whereby at least one first rigid member is adapted to be fastened to the condyl of the thigh bone, and at least one second rigid member is adapted to be fastened to the tibia of the shin bone, so that said curved strip of material of said first rigid member engages the top planar surface of said second rigid member in point contact therewith.
2. The artificial limb as recited in claim 1, wherein said fastening members disposed on the inside surface of said strip of material include a plurality of elongated parallel rib members, integrally formed with said strip of material.
US3715763D 1971-04-21 1971-04-21 Artificial limb for the knee joint Expired - Lifetime US3715763A (en)

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Cited By (75)

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US3774244A (en) * 1972-02-08 1973-11-27 Relief Ruptured And Crippled S Knee-joint prosthesis
US3813699A (en) * 1973-01-15 1974-06-04 R Giliberty Prosthetic hip joint
US3824630A (en) * 1972-06-23 1974-07-23 Zimmer Mfg Co Prosthetic joint for total knee replacement
US3837009A (en) * 1972-12-07 1974-09-24 New York Soc Relief Of Rupture Knee prosthesis
US3839742A (en) * 1972-07-22 1974-10-08 Link W Prosthetic device for the tarsal joint
US3852830A (en) * 1973-02-15 1974-12-10 Richards Mfg Co Knee prosthesis
FR2229382A1 (en) * 1973-05-17 1974-12-13 Charnley John
US3869731A (en) * 1973-02-14 1975-03-11 Univ California Articulated two-part prosthesis replacing the knee joint
US3872519A (en) * 1974-04-04 1975-03-25 Nicholas J Giannestras Total ankle prosthesis
US3886599A (en) * 1974-07-25 1975-06-03 Schlein Louis Charles Surgically implantable total ankle prosthesis
US3891998A (en) * 1973-01-12 1975-07-01 Nat Res Dev Endoprosthetic shoulder joint
US3909852A (en) * 1973-12-17 1975-10-07 Charles A Homsy Implantable substitute structure for at least part of the middle ear bony chain
US3924277A (en) * 1971-05-04 1975-12-09 Nat Res Dev Knee joint prosthesis
US3925892A (en) * 1972-06-12 1975-12-16 Juillet Jean Marc G Artificial tooth implant device
US3945053A (en) * 1973-03-05 1976-03-23 Purdue Research Foundation Rolling contact prosthetic knee joint
US4085466A (en) * 1974-11-18 1978-04-25 National Research Development Corporation Prosthetic joint device
FR2403068A2 (en) * 1976-07-28 1979-04-13 Rambert Andre Partial knee joint prosthesis - has femoral plate set directly into femur without anchorage socket
US4179758A (en) * 1976-04-29 1979-12-25 Howmedica, Inc. Fixation stem for prosthetic device
US4193140A (en) * 1975-12-19 1980-03-18 Richards Manufacturing Company, Inc. Knee prosthesis
DE3013155A1 (en) * 1979-04-05 1980-10-23 Minnesota Mining & Mfg Tibial prosthesis
US4353135A (en) * 1980-05-09 1982-10-12 Minnesota Mining And Manufacturing Company Patellar flange and femoral knee-joint prosthesis
US4714473A (en) * 1985-07-25 1987-12-22 Harrington Arthritis Research Center Knee prosthesis
US4963153A (en) * 1987-06-30 1990-10-16 Sulzer Brothers Limited Metal tibial anchoring part for a partial knee joint prosthesis
US4964868A (en) * 1985-07-25 1990-10-23 Harrington Arthritis Research Center Knee prosthesis
EP0437390A1 (en) * 1990-01-12 1991-07-17 Societe Civile D'innovations Technologiques Femoral component for a knee prosthesis
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US20060085078A1 (en) * 2004-10-20 2006-04-20 Steffensmeier Scott J Mobile bearing unicondylar knee prosthesis
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US20100070045A1 (en) * 2000-05-01 2010-03-18 Arthrosurface Incorparated System and Method for Joint Resurface Repair
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US20100168857A1 (en) * 2008-05-30 2010-07-01 Edwin Burton Hatch Flexibly compliant ceramic prosthetic meniscus for the replacement of damaged cartilage in orthopedic surgical repair or reconstruction of hip, knee, ankle, shoulder, elbow. wrist and other anatomical joints
US20100191245A1 (en) * 2003-02-24 2010-07-29 Arthrosurface Incorporated Trochlear Resurfacing System and Method
US20100268239A1 (en) * 2009-04-17 2010-10-21 Arthrosurface Incorporated Glenoid Resurfacing System and Method
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US20110033309A1 (en) * 2009-08-07 2011-02-10 Chia-Teh Chen Ceiling fan positioning structure for shielding a hanging portion of a ceiling fan
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US8425522B2 (en) 2000-01-14 2013-04-23 Bonutti Skeletal Innovations Llc Joint replacement method
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Cited By (124)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924277A (en) * 1971-05-04 1975-12-09 Nat Res Dev Knee joint prosthesis
US3774244A (en) * 1972-02-08 1973-11-27 Relief Ruptured And Crippled S Knee-joint prosthesis
US3925892A (en) * 1972-06-12 1975-12-16 Juillet Jean Marc G Artificial tooth implant device
US3824630A (en) * 1972-06-23 1974-07-23 Zimmer Mfg Co Prosthetic joint for total knee replacement
US3839742A (en) * 1972-07-22 1974-10-08 Link W Prosthetic device for the tarsal joint
US3837009A (en) * 1972-12-07 1974-09-24 New York Soc Relief Of Rupture Knee prosthesis
US3891998A (en) * 1973-01-12 1975-07-01 Nat Res Dev Endoprosthetic shoulder joint
US3813699A (en) * 1973-01-15 1974-06-04 R Giliberty Prosthetic hip joint
US3869731A (en) * 1973-02-14 1975-03-11 Univ California Articulated two-part prosthesis replacing the knee joint
US3852830A (en) * 1973-02-15 1974-12-10 Richards Mfg Co Knee prosthesis
US3945053A (en) * 1973-03-05 1976-03-23 Purdue Research Foundation Rolling contact prosthetic knee joint
FR2229382A1 (en) * 1973-05-17 1974-12-13 Charnley John
US3953899A (en) * 1973-05-17 1976-05-04 Chas. F. Thackray Limited Knee arthroplasty
US3909852A (en) * 1973-12-17 1975-10-07 Charles A Homsy Implantable substitute structure for at least part of the middle ear bony chain
US3872519A (en) * 1974-04-04 1975-03-25 Nicholas J Giannestras Total ankle prosthesis
US3886599A (en) * 1974-07-25 1975-06-03 Schlein Louis Charles Surgically implantable total ankle prosthesis
US4085466A (en) * 1974-11-18 1978-04-25 National Research Development Corporation Prosthetic joint device
US4193140A (en) * 1975-12-19 1980-03-18 Richards Manufacturing Company, Inc. Knee prosthesis
US4179758A (en) * 1976-04-29 1979-12-25 Howmedica, Inc. Fixation stem for prosthetic device
FR2403068A2 (en) * 1976-07-28 1979-04-13 Rambert Andre Partial knee joint prosthesis - has femoral plate set directly into femur without anchorage socket
DE3013155A1 (en) * 1979-04-05 1980-10-23 Minnesota Mining & Mfg Tibial prosthesis
US4353135A (en) * 1980-05-09 1982-10-12 Minnesota Mining And Manufacturing Company Patellar flange and femoral knee-joint prosthesis
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