USRE34632E - Device at artificial joints - Google Patents

Device at artificial joints Download PDF

Info

Publication number
USRE34632E
USRE34632E US07910825 US91082592A USRE34632E US RE34632 E USRE34632 E US RE34632E US 07910825 US07910825 US 07910825 US 91082592 A US91082592 A US 91082592A US RE34632 E USRE34632 E US RE34632E
Authority
US
Grant status
Grant
Patent type
Prior art keywords
part
joint
artificial
bone
bristles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07910825
Inventor
Anders Berggren
Hakan Rohman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilink Inc
Original Assignee
Unilink Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • 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
    • 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
    • A61F2/42Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • 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
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30383Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
    • A61F2002/30387Dovetail connection
    • 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
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30451Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • 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
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305Snap connection
    • 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
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30563Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
    • 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
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30602Shaft made of a bundle of anchoring rods or bristles, e.g. fasciculate shaft
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0058Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • A61F2310/00023Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389The prosthesis being coated or covered with a particular material
    • A61F2310/00395Coating or prosthesis-covering structure made of metals or of alloys
    • A61F2310/00407Coating made of titanium or of Ti-based alloys

Abstract

Fastening means for artificial joints including two titanium wires that are wound into a spiral and wherein the wires clamp a number of bristles between them that extend essentially radially outwards toward the interior of the bone. The bristles are a little bit too long for undisturbed insertion into the cavity of the bone and, thus they will be slightly turned backwards on insertion, thereby securing a very steady grip once inserted.

Description

BACKGROUND OF THE INVENTION

It has been known for some time how to replace worn, or in other ways damaged, joints--for instance joints damaged by rheumatism, by removing a joint end from a bone and replacing this end with an artificial part. These artificial parts include a joint part and a connection part that is inserted into the cavity of the remaining bone. The fastening of the artificial part in the bone has been carried out in different way, for instance, the connection part has been threaded and/or cemented into the bone.

Presently available artificial parts have a number of drawbacks. Firstly, this method of fasteing is comparatively complicated and time consuming. Secondly, with time, great loads, for instance in the vicinity of knee joints and thigh bones, cause an increasing play between an artificial part and bone, which may require a replacement of the artificial part. Change of the artificial part normally involves the shortening of the bone to obtain adequate material in which to fasten the artificial part. After a few replacements of the artificial part, so little of the bone remains that the joint must be made rigid due to the lack of bone material.

A further drawback of the artificial parts known thus far is that the natural formation of blood vessels cannot occur within inner cavity of the bone, which presumably further reduces the life span of the mounting of the artificial part and, thus, of the artificial part itself.

SUMMARY OF THE INVENTION

Some objects of this invention are to solve the above mentioned problems and to provide a simple, useable, artificial part fastening or mounting that is easy to apply, that does not need to be exchanged, and that allows improved vascularization. Other and further objects and advantages will appear hereinafter.

These objects may be achieved in accordance with the present invention by means of a supporting structure that is inserted into the axial cavity of the bone. This supporting structure is provided with bristles, fibers, loops, or the like, with such length that the combined diameter of the device is somewhat larger than the cavity in the bone, allowing at least some of the bristles, fibers, loops, or the like to retain a certain pretension at mounting. In other words, when the fastening element is inserted into the hollow of the bone, the bristles are bent somewhat, thereby causing greater resistance against withdrawal than against insertion. It will in fact be practically impossible to withdraw the fastening element. Preferably the number of bristles, fibers or the like is very large. In this way extensive contact between bone and the artificial part fastening element is obtained simultaneously as an adaption is automatically made to possible irregularities on the inside of the bone.

Furthermore, by fabricating the bristles, fibers, or loops in titanium, the bone and the artificial part fastening element will grow together and with time will become integrated. Bleeding and vascularization can take place between the bristles, fibers or loops. Furthermore, it is also possible to make the supporting structure more or less porous or open. Since the tensions are less as you go further into the bone, the fastening element can be more open or have fewer bristles, further within the bone. The length of the bristles, and the density thereof, are primarily governed by the forces that have to be transferred. Therefore, the density of the bristles need not necessarily be the same over the entire length of the fastening element.

If bristles of titanium are used, many thin bristles can be used in view of the hard, stiff character of titanium. In the alternative, titanium-containing alloys coated by titanium can be used. It is also possible to use plastic materials coated with titanium.

The bristles may initially be directed radially or possibly somewhat rearward. It is also possible that only some of the bristles are so directed.

The supporting structure need not necessarily be rigid, but may allow a certain elasticity that may preferably be calculated to coincide with that of the bone so that no tension peaks are developed in the force transfer back and forth.

By means of the invention, an immediate sturdy grip is obtained in the bone, preventing the mounted artificial part from loosening. With the use of titanium, the device is prevented from working loose over time since the contact surface is great and, thus, the specific load small.

It should be observed that the fastening means described above can also be used for the joining of broken bones.

Further details and advantages of the invention will become apparent from the following description of a preferred embodiment and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a cross-section of a joint with the device of the present invention as seen from the front.

FIG. 2 shows the same joint and device of FIG. 1 in cross section from the side.

FIG. 3 shows a cross-section of a joint with an alternative embodiment of the device of the present invention from the side.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The artificial joint shown in the drawings (where like numbers designate like elements) includes a bowl or concave joint part 4 and a ball joint part 3, each fastened in a bone, I and 2 respectively. The lower part, the ball part 3, is welded to two wires 5 of titanium that, from diametrical peripheral fastening points, extend toward each other, then continue by winding around each other. In FIGS. 1 and 2, between the spirals of these two wires 5, thin threadlike bristles 6, also of titanium, are clamped. FIG. 3 illustrated the use of loops 26 as an alternative to the bristles 6 of FIGS. 1 and 2.

The bristles 6, or loops 26 are of a length such that they, on insertion into the bone 2, will be bent somewhat upwards. This means that they will not exert any particular resistance against their introduction into the bone. However, the resistance against possible attempts to withdraw the artificial joint part from the bone will be very great. By using a large number of bristles or loops, a good fastening against turning of the artificial joint part relative to the bone is achieved.

The ball joint part 3 has a circumferential downwards protruding flange 7 gripping around the bone 2 on its corresponding shaped end 8. In this way, the artificial joint part will be locked against possible tilting, with the bristles and the titanium wire pressing the ball joint part against the bone 2.

In one embodiment, the interior of the ball joint 3 can be filled with silicone at the mounting. In the alternative, the interior can be entirely empty. By using pure titanium or titanium alloys or other materials coated with titanium, or perhaps ever other materials that can grow together with the bone, over time an integration is achieved. In this way, not only is there an immediate, sturdy attachment, but there is also a lasting attachment to the bone.

The upper joint bowl part or concave part 4 has a shape corresponding to the shape of the ball joint part 3 so that an angular movement is possible. The surfaces facing each other are usually cylindrical or spherical surfaces where the lower ball joint part 3 has a waist or groove 9 into which a protrusion or ridge 10 on the upper bowl joint part can grip to provide an increased resistance against turning and sideways dislocation. By proportioning the interrelated length of groove and the ridge angle, stops for the joint can be achieved. The upper bowl joint part 4 is not made of titanium, but is made of a synthetic material that affords negligible friction against titanium. An example of this is high density polyethylene (HDP) that has proven to be compatible with human tissues. In the bowl part 4, a dove tail groove 12 extends sideways and into this grips a correspondingly shaped dove tail 14 that, in turn, is part of a titanium plate 13. Preferably, the titanium plate 13 and the joint bowl part 4 of HDP are provided with snap means so that the lateral location, when ideally situated, is secured. Wires 15 are welded to the plate 13 and are then wound to a spiral that holds bristles 16, or loops 28 in the same way as has been described above for the lower ball shaped joint part 3. Also, the titanium disk or plate 13 is provided with a flange 17 gripping around a corresponding shaping 18 of the bone 1.

The use of a dove tail joint to join the joint bowl part 4 with its fastening means provides the advantage that the joint bowl part 4 can easily be exchanged if, for instance, after many years of use, the part becomes worn. The exchange can be accomplished through a procedure that is far easier and less complicated and time consuming than would be the case if it were necessary to exchange the entire artificial joint or artificial joint part.

Of course, the lower ball joint part 3 can also be made in a similar way to allow a change of a part subjected to wear, as shown in FIG. 3. This can, for instance, take place by use of a dove tail joint with the interlocation of a plastic part. Thus, a dove tail groove .[.29.]. .Iadd.20 .Iaddend.can extend sideways in the lower ball joint 3 and into this grips a correspondingly shaped dove tail 22 that, in turn, is part of a plastic plate 24. By using plastic for one half of the joint, and possibly as a joining element in the lower part, a certain elasticity against shock is achieved that reduces tensions in other joints as well as in the fastening of the artificial joint.

It should be observed that the flanges 7 and 17, and the corresponding shaping of the bone ends respectively, need not necessarily be exactly matched to the outer shape of the bone, but, instead, to facilitate working, it is possible to use flanges that are circular, for instance concentric with the axis of the wound titanium wires.

The joint has a ligament 19 on each side.

By means of the invention, an artificial joint or joint parts is realized for large as well as small joints that is very similar to the desired relationships of the original joint.

Since the fastening according to the invention in principle is, or can be made, elastic over its entire length, there will be no tension peaks where the artificial part ends, unlike many known artificial joint parts in which such tension peaks do occur.

Due to the improved fastening characteristics and the soft transference of forces from the artificial part to the bone, it is actually possible to make other types of replacements that have previously been impossible. Due to previously poor fastening characteristics, the artificial part has always had to be comparatively short in order to avoid having excessive torques exerted on the remaining bone part. With the invention, the remaining bone will not be subjected to forces greater than the bone originally could tolerate. Therefore, an artificial joint part according to the invention can be longer, thereby abolishing the previous necessity of bone shortening.

The drawings have shown the use of two wires for fastening the bristles. Of course, more than two wires can be used and it is also possible to use different types of supporting structure for carrying the bristles. For instance, the bristles can be fastened in a cast plastic structure.

If the stiffness of the supporting structure decreases towards the interior of the cavity, the transference of forces to and from the joint will take place without significant tension peaks.

In the above example, two wires have been used to secure or fasten the bristles, however, a greater number of bristles can also be used. Furthermore, if any other type of supporting structure is used, for instance a plastic structure, then a porous or open structure can also be employed.

Thus, a fastening means for artificial joints is disclosed. While embodiments and applications of this invention have been shown and described, it would be apparent to those of ordinary skill in the art that many more modifications are possible without departing from the inventive concepts herein. The invention, therefore, is not to be restricted except in the spirit of the appended claims.

Claims (21)

What is claimed is:
1. An artificial joint for connecting .[.an upper bone having a cavity therein.]. .Iadd.a first part .Iaddend.and a .[.lower.]. bone .Iadd.part .Iaddend.having a cavity therein, said artificial joint comprising:
.[.an upper concave.]. .Iadd.a .Iaddend.joint part having a .[.concave.]. .Iadd.first .Iaddend.portion .Iadd.comprising means for attaching said joint part to said first part .Iaddend.and .Iadd.having .Iaddend.an opposite side;
.[.a lower ball joint part having a rounded portion and an opposite side oriented such that the rounded portion of the lower ball joint part fits within the concave portion of the upper concave joint part;.].
a .[.pair of.]. support .[.structures, one.]. .Iadd.structure .Iaddend.attached to the opposite side of the .[.upper concave.]. joint part and .[.one attached to the opposite side of the lower ball joint part, each of the support structures.]. having an end remote from .[.their respective.]. .Iadd.the .Iaddend.joint .[.parts.]. .Iadd.part .Iaddend.adapted for insertion and retention into .[.a.]. .Iadd.the .Iaddend.cavity of .[.one of.]. said .[.upper and lower bones.]. .Iadd.bone part .Iaddend.and holding means on .[.each.]. .Iadd.the .Iaddend.support structure for holding such support structure in .[.a respective.]. .Iadd.the .Iaddend.bone cavity, said holding means comprising a plurality of bristles, fibers, or loops extending from .[.a respective.]. .Iadd.the support .Iaddend.structure only radially outwardly and toward .[.a respective.]. .Iadd.the .Iaddend.joint part, wherein the length of at least a portion of the bristles, fibers, or loops is such that the outer diameter of such bristles, fibers, or loops as attached to the .[.respective.]. support structure in an untensioned state is adapted to exceed the diameter of the cavity in which it is to be inserted.
2. The artificial joint of claim 1 wherein .[.each of.]. said support .[.structures comprise.]. .Iadd.structure comprises .Iaddend.a spiral of wound wires, said .[.bristle.]. .Iadd.bristles.Iaddend., fibers, or loops being clamped between the wound wires.
3. The artificial joint of claim 1 wherein one or more of the .[.lower ball.]. joint part, the support .[.structures.]. .Iadd.structure.Iaddend., and the bristles, fibers, or loops are comprised of titanium or titanium alloys.
4. The artificial joint of claim 1 wherein one or more of the .[.lower ball.]. joint part, the support .[.structures.]. .Iadd.structure.Iaddend., and the bristles, fibers, or loops are coated with titanium.
5. The artificial joint of claim 1 wherein the density of the bristles, fibers, or loops decreases towards the remote .[.ends.]. .Iadd.end .Iaddend.of the support .[.structures.]. .Iadd.structure. .Iaddend.
6. The artificial joint of claim 1 wherein said support .[.structures are.]. .Iadd.structure is .Iaddend.comprised of a plastic.
7. The artificial joint of claim 1 wherein said support .[.structures decrease.]. .Iadd.structure decreases .Iaddend.in stiffness towards the remote .[.ends.]. .Iadd.end.Iaddend..
8. The artificial joint of claim .[.1.]. .Iadd.22 .Iaddend.wherein the rounded portion of the lower ball joint part has a groove into which a protrusion on the concave portion of the upper concave joint part fits to provide increased resistance against turning and sideways dislocation of the attached bones.
9. The artificial joint of claim .[.1.]. .Iadd.22 .Iaddend.wherein the upper concave joint part is comprised of a cup part having a concave side and an opposite side and a plate part attached to said opposite side of the cup part.
10. The artificial joint of claim 9 wherein the cup part of the upper concave joint part is comprised of a biocompatible material chosen to minimize friction with titanium.
11. The artificial joint of claim 9 wherein said cup part of the upper concave joint part is comprised of high density polyethylene.
12. The artificial joint of of claim 9 wherein said plate part of the upper concave joint part further comprises a flange extending away from the cup part and formed to grip the upper bone.
13. The artificial joint of claim 9 wherein said plate part of the upper concave joint part is comprised of titanium or titanium alloys.
14. The artificial joint of claim 9 wherein said plate part of the upper concave joint part is removably attached to the cup part to allow replacement of the said cup part.
15. The artificial joint of claim 14 wherein said plate part is removably attached by means of a dove tail ridge extending along said plate part in a direction perpendicular to the bending plane of said artificial joint that is inserted into a dove tail groove extending along the opposite side of said cup part in a similar direction.
16. The artificial joint of claim .[.1.]. .Iadd.22 .Iaddend.wherein said lower ball joint part further comprises a flange extending from the opposite side and formed to grip the lower bone.
17. The artificial joint of claim .[.1.]. .Iadd.22 .Iaddend.wherein said lower ball joint part is comprised of a rotator part having a rounded portion and an opposite side and a plate part attached to the opposite side of the rotator part.
18. The artificial joint of claim 17 wherein said plate part of said lower ball joint part is comprised of an elastic substance.
19. The artificial joint of claim 17 wherein said plate part of the lower ball joint part is removably attached to the rotator part to allow replacement of the said rotator part.
20. The artificial joint of claim 19 wherein said plate part of the lower ball joint part is removably attached by means of a dove tail ridge extending along said plate part in a direction perpendicular to the bending plane of said artificial joint that is inserted into a dove tail groove extending along the opposite side of said rotator part in a similar direction.
21. An artificial joint for connecting an upper bone having a cavity therein and a lower bone having a cavity therein, said artificial joint comprising:
an upper concave joint part comprised of a cup part, having a concave side with a protrusion therein and an opposite side, and a plate part removably attached to said opposite side of said cup part;
a lower ball joint part having a rotator part having a rounded portion with a groove therein and an opposite side, oriented such that the rounded portion of the lower ball joint part fits within the concave portion of the upper cancave joint part and the groove fits to the protrusion, and a plate part removably attached to the opposite side of the rotator part;
a pair of support structures, each comprised of a spiral of wound wires, one attached to the opposite side of the upper concave joint part and one attached to the opposite side of the lower ball joint part, each of the support structures having an end adapted for insertion and retention into a cavity of one of said upper and lower bones and holding means on each support structure for holding such support structure in a respective bone cavity, said holding means comprising a plurality of bristles, fibers, or loops extending from a respective structure only radially outwardly and toward a respective joint part, the length of the bristles, fibers, or loops being such that an outer diameter of the bristles, fibers, or loops as attached to the support structure in an untensioned state is adapted to exceed the diameter of the cavity in which it is to be inserted and the bristles, fibers, or loops are angled only radially downwardly from the support structure towards the joint parts and we adapted to be tensioned against the interior of the cavities; and
wherein one or more of the plate part of the upper concave joint part, the rotator part, the plate part of the lower ball joint part, the wound wires, and the bristles, fibers, or loops is comprised of titanium or titanium alloys. .Iadd.22. An artificial joint for connecting an upper bone having a cavity therein and a lower bone having a cavity therein, said artificial joint comprising:
an upper concave joint part having a concave portion and an opposite side;
a lower ball joint part having a rounded portion and an opposite side oriented such that the rounded portion of the lower ball joint part fits within the concave portion of the upper concave joint part;
a pair of support structures, one attached to the opposite side of the upper concave joint part and one attached to the opposite side of the lower ball joint part, each of the support structures having an end remote from their respective joint parts adapted for insertion and retention into a cavity of one of said upper and lower bones and holding means on each support structure for holding such support structure in a respective bone cavity, said holding means comprising a plurality of bristles, fibers, or loops extending from a respective structure only radially outwardly and toward a respective joint part, wherein the length of at least a portion of the bristles, fibers, or loops is such that the outer diameter of such bristles, fibers, or loops as attached to the respective support structure in an untensioned state is adapted to exceed the diameter of the cavity in which it is to be inserted. .Iaddend.
US07910825 1988-01-28 1992-07-07 Device at artificial joints Expired - Lifetime USRE34632E (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE8800274.6 1988-01-28
SE8800274 1988-01-28
US07548958 US5061288A (en) 1988-01-28 1989-01-27 Device at artificial joints
US07910825 USRE34632E (en) 1988-01-28 1992-07-07 Device at artificial joints

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07910825 USRE34632E (en) 1988-01-28 1992-07-07 Device at artificial joints

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07548958 Reissue US5061288A (en) 1988-01-28 1989-01-27 Device at artificial joints

Publications (1)

Publication Number Publication Date
USRE34632E true USRE34632E (en) 1994-06-07

Family

ID=20371203

Family Applications (2)

Application Number Title Priority Date Filing Date
US07548958 Expired - Lifetime US5061288A (en) 1988-01-28 1989-01-27 Device at artificial joints
US07910825 Expired - Lifetime USRE34632E (en) 1988-01-28 1992-07-07 Device at artificial joints

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US07548958 Expired - Lifetime US5061288A (en) 1988-01-28 1989-01-27 Device at artificial joints

Country Status (5)

Country Link
US (2) US5061288A (en)
EP (1) EP0400035B1 (en)
JP (1) JPH03502287A (en)
DE (2) DE68917464T2 (en)
WO (1) WO1989006946A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5769898A (en) * 1993-12-09 1998-06-23 Nobel Biocare Ab Device for supporting a membrane used for promoting bone growth
US5776202A (en) * 1993-09-07 1998-07-07 Copf; Franz Joint prosthesis

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69222004D1 (en) * 1991-06-25 1997-10-09 Microaire Surgical Instr Inc Prosthesis for a metatarsal phalangeal joint
US5370700A (en) * 1993-02-19 1994-12-06 Sarkisian; James S. Prosthetic knee joint
FR2705559B1 (en) * 1993-05-28 1995-08-04 Lafosse Laurent Joint prosthesis shield finger.
US5522900A (en) * 1993-12-17 1996-06-04 Avanta Orthopaedics Prosthetic joint and method of manufacture
FR2742043B1 (en) * 1995-12-11 1998-03-13 Merck Biomaterial France Total prosthesis for phalangeal joint
FR2743717B1 (en) * 1996-01-23 1998-04-30 Maksene Philippe Phalangeal joint prosthesis of
US5879403A (en) * 1997-03-27 1999-03-09 Johnson & Johnson Professional, Inc. Bistable cement restrictor
EP1627615A3 (en) * 2004-08-18 2006-11-02 Arthrex, Inc. Modular joint replacement implant with hydrogel surface
DE602005014716D1 (en) * 2004-09-08 2009-07-16 Arthrex Inc modular joint prosthesis
US9005307B2 (en) 2006-11-07 2015-04-14 Biomedflex, Llc Prosthetic ball-and-socket joint
US20110166671A1 (en) * 2006-11-07 2011-07-07 Kellar Franz W Prosthetic joint
US8029574B2 (en) * 2006-11-07 2011-10-04 Biomedflex Llc Prosthetic knee joint
US9005306B2 (en) * 2006-11-07 2015-04-14 Biomedflex, Llc Medical Implants With Compliant Wear-Resistant Surfaces
US8070823B2 (en) * 2006-11-07 2011-12-06 Biomedflex Llc Prosthetic ball-and-socket joint
US8308812B2 (en) 2006-11-07 2012-11-13 Biomedflex, Llc Prosthetic joint assembly and joint member therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339123A (en) * 1940-09-13 1944-01-11 Volckening Inc Bottle cleaning device
US4114504A (en) * 1977-07-25 1978-09-19 George Koregelos Demoisturizer for wind musical instruments
US4671768A (en) * 1982-12-06 1987-06-09 Ton Michael A Implant as well as a dental prosthesis attached to one or more of such implants
US4681590A (en) * 1986-06-18 1987-07-21 John Tansey Femoral stem prosthesis
DE3613657A1 (en) * 1986-04-23 1987-11-05 Walter A Dr Med Laabs Endoprosthesis

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064567A (en) * 1976-09-15 1977-12-27 The Sampson Corporation Prosthesis-to-bone interface system
DE2932435A1 (en) * 1979-08-10 1981-02-26 Bayer Ag Implant for biological body parts, especially dental implant for the pine
US4743263A (en) * 1984-11-09 1988-05-10 Ceske Vysoke Uceni Technicke Adaptable isoelastic hip-endoprosthesis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339123A (en) * 1940-09-13 1944-01-11 Volckening Inc Bottle cleaning device
US4114504A (en) * 1977-07-25 1978-09-19 George Koregelos Demoisturizer for wind musical instruments
US4671768A (en) * 1982-12-06 1987-06-09 Ton Michael A Implant as well as a dental prosthesis attached to one or more of such implants
DE3613657A1 (en) * 1986-04-23 1987-11-05 Walter A Dr Med Laabs Endoprosthesis
US4681590A (en) * 1986-06-18 1987-07-21 John Tansey Femoral stem prosthesis

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Adell et al., "A 15-year Study of Osseointegrated Implants in the Treatment of the Edentulous Jaw," Int. J. Oral. Surg., 1981, 10:387-416.
Adell et al., A 15 year Study of Osseointegrated Implants in the Treatment of the Edentulous Jaw, Int. J. Oral. Surg., 1981, 10:387 416. *
Raveh et al., "Use of the Titanium-coated Hollow Screw and Reconstruction Plate System in Bridging of Lower Jaw Defects," J Oral Maxillofac Surg, 42:281-294, 1984.
Raveh et al., Use of the Titanium coated Hollow Screw and Reconstruction Plate System in Bridging of Lower Jaw Defects, J Oral Maxillofac Surg, 42:281 294, 1984. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5776202A (en) * 1993-09-07 1998-07-07 Copf; Franz Joint prosthesis
US5769898A (en) * 1993-12-09 1998-06-23 Nobel Biocare Ab Device for supporting a membrane used for promoting bone growth

Also Published As

Publication number Publication date Type
WO1989006946A1 (en) 1989-08-10 application
DE68917464D1 (en) 1994-09-15 grant
EP0400035B1 (en) 1994-08-10 grant
DE68917464T2 (en) 1995-02-09 grant
US5061288A (en) 1991-10-29 grant
JPH03502287A (en) 1991-05-30 application
EP0400035A1 (en) 1990-12-05 application

Similar Documents

Publication Publication Date Title
US5609646A (en) Acetabular cup for a total hip prosthesis
US6811569B1 (en) Expansible acetabular prosthesis with double mobility
US7235105B2 (en) Threaded center line cage with winged end gap
US6176877B1 (en) Two piece prosthetic heart valve
US4563778A (en) Prosthetic acetabular cup
US5021063A (en) Joint socket member for a joint prosthesis
US6102955A (en) Surgical method, surgical tool and artificial implants for repairing knee joints
US4808186A (en) Controlled stiffness femoral hip implant
US6174334B1 (en) Expandable intervertebral fusion implant and applicator
US6299648B1 (en) Locking hip prosthesis
US6213775B1 (en) Method of fastening an implant to a bone and an implant therefor
US6352559B1 (en) Endoprosthetic bone joint devices
US3953896A (en) Prosthetic ligament
US5984957A (en) Radially expanded prostheses with axial diameter control
US5197986A (en) Recessed patellar prosthesis
US3745590A (en) Articulating prosthesis with ligamentous attachment
US6214052B1 (en) Tibial component with a reversible, adjustable stem
US4718913A (en) Dual, ankle, springs prosthetic foot and ankle system
US6585769B1 (en) Artificial spinal ligament
US4834755A (en) Triaxially-braided fabric prosthesis
US5397360A (en) Modular components for prosthetic implants
US4489446A (en) Heart valve prosthesis
US6695883B2 (en) Femoral neck fixation prosthesis
US20040172138A1 (en) Compliant fixation of external prosthesis
US5306309A (en) Spinal disk implant and implantation kit

Legal Events

Date Code Title Description
FPAY Fee payment

Year of fee payment: 4