WO1989006946A1 - Device at artificial joints - Google Patents
Device at artificial joints Download PDFInfo
- Publication number
- WO1989006946A1 WO1989006946A1 PCT/SE1989/000025 SE8900025W WO8906946A1 WO 1989006946 A1 WO1989006946 A1 WO 1989006946A1 SE 8900025 W SE8900025 W SE 8900025W WO 8906946 A1 WO8906946 A1 WO 8906946A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bone
- bristles
- joint
- means according
- titanium
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The 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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30383—Connections 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
- A61F2002/30387—Dovetail connection
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The 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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30451—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The 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
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/305—Snap connection
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The 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
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30563—Special 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The 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
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30602—Shaft made of a bundle of anchoring rods or bristles, e.g. fasciculate shaft
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0058—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00395—Coating or prosthesis-covering structure made of metals or of alloys
- A61F2310/00407—Coating made of titanium or of Ti-based alloys
Definitions
- connection part that is inserted into the cavity of the remaining bone.
- the faste ⁇ ning in the bone has been carried out in different ways for instance the connection part has been threaded and/or cemented into the bone.
- a further drawback of the known artificial part this far is that the inner cavity of the bone is not available for the formation of vessels in a natural way, which presumably further reduces the life spann of the mounting of a artificial part and thus of the artificial part itself.
- the invention has as it's object to solve the above mentioned problem and provide a simply useable artificial part fastening or mounting that is easy to apply, that does not need to be exchanged and that allows an improved bleed- ing.
- This is in accordance with the invention achieved by means of a supporting structure that is inserted into the axial cavity of the bone and by this supporting structure beeing provided with bristles, fibres, loops or the like with such length that the combined dia etre of the device is somewhat larger than the cavity in the bone so that at least some of the bristles, fibres or loops or the like retain a certain pretension at mounting.
- the bristles are bent somewhat which will give a greater resistance against withdrawal than against the insertion. It will in fact be practically impossible to withdraw the fastening element.
- the number of bristles, fibres or the corresponding is very great. In this way a very great contact surface between bone and artificial part fastening element is obtained simultaneously as an adaption is automatically made to possible irregularities on the inside of the bone.
- the bone and the artificial part fastening element will grow together and will so to say be integrated with time. Bleeding and the development of vessels can take place between the bristles or loops and it is furthermore possible to make the supporting structure more or less porous or open. Since the tensions are less further in the bone the fastening element can there be more open or be provided with less bristles.
- the length of the bristles and the density thereof are above all ruled by the forces that has to be transferred and the density of the bristles need not necessarily be the same over the entire length of the fastening element.
- bristles of titanium thin but many bristles can be used in view of the hard and stiff character of titanium.
- titanium containing alloys coated by titanium can be used and it is also possible to consider plastic materials coated with titanium.
- the bristles can from the start be directed radially or possibly somewhat rearwards or it is of course possible that omly some of them are.
- the supporting structure need not necessary 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 forth and back.
- fastening means descri- bed above can also be used for the jointing of brooken bones .
- Fig 1 shows a joint seen from the front and fig 2 the same joint seen from the side, both in a longitudinal section.
- the artificial joint shown in the drawings includes a bowl or concave joint part 4 and a ball concave joint part 3 each fastened in a bone 1 and 2 respectively.
- the lower part, the ball part 3 is welded to two wires 5 of titanium which from diametrical pheriferial fastening points extend towards each other, then to continue in a winding around each other. Between the windings of these two wires 5 thin threadlike bristles 6, also of titanium are clamped.
- the bristles 6 have such a length that they on inser ⁇ tion into the bone 2 will be bent somewhat upwards. This means that they will not excert any particular resistance against the intruducing into the bone. However the resist ⁇ ance against possible attempts to withdraw the artificial joint part from the bone will be very great. By useing a great number of bristles a good fastening against a turning of the artificial joint part relative the bone is achieved.
- the ball joint part 3 has a circumferencial downwards protruding flange 7 gripping around the bone 2 on it's cor- respondingly shaped end 8. In this way the artificial joint part will be locked against possible tilting, with the bristles and the titanium wires pressing the ball joint part against the bone 2.
- the inner of the ball joint part 5 can be filled with silicon at the mounting alternatively can the inner be entirely empty.
- the upper joint bowl part or concave part 4 has a shape corresponding to the shape of the ball joint part 5 so that an angular movement is possible.
- the surfaces turned against each other has principly the shape of cylinder or sphere surfaces where the lower ball joint part 5 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 dislocation sidewise. By di- mensioning the interrelated length of groove and 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 against titanium gives a low friction. An example of this is HDP (high density polyetylen) that has shown itself to be a material that work well with human tissues.
- HDP high density polyetylen
- a dove tail groove 12 extends sidew ⁇ ise and into this -grips an correspondingly shaped dove tail 14 that in turn is a part of a titanium plate 13.
- the titanium plate and the joint bowl part 3 of HDP are provided with snap means so that the lateral location when well achieved is secured.
- To the plate 13 is then welded wires 15 which are then wound to a spiral that holds bristles 16 in the same way as has been described above for the lower ball shaped joint part.
- the titanium disk or plate 15 is provided with a flange 17 gripping around a corresponding shaping 18 of the bone 1.
- the joint bowl part can easily be exchanged if it for instance after many years of use becomes too worn and this with an operation that is far easier and less complicated and time consu eing than would be the case if one would have to exchange the entire artificial joint or artificial joint part.
- the lower ball joint part can be made in a corresponding way to allow a change of the part subjected to wear. This can for instance take place by means of a dove tail joint with the interl ocation of a plastic part.
- flanges 7, 17 and the corresponding shaping of the bone ends respectively need not necessarily be exactly after the outer shape of the bone, but to fasciliate working it is of course also possible to use flanges that are circular for instance concentric wi h the axis of the wound titanium wires.
- the joint has on each side a ligament 19.
- an artificial joint or joint parts is achieved for big as well as small joints that are very similiar to the desired relationships of the original joint .
Abstract
Fastening means for artificial joint including two titanium wires (5) that are wound to a spiral and that the wires between them clamp a number of bristles (6) that extend essentially radially outwards towards the inner of the bone. The bristles are a little bit too long for the undisturbed insertion into the cavity of the bone and this means that they will be slightly turned backwards on insertion which secures a very steady grip once inserted.
Description
Device at artificial joints
To replace worn or in other way for instance as a result of rheumatism damaged joints it is since considerably long time known to remove a joint end from a bone and re- place 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 faste¬ ning in the bone has been carried out in different ways for instance the connection part has been threaded and/or cemented into the bone.
To start with this is comparatively complicated and time consumeing and secondly great loads as for instance in the vicinity of knee joints and tigh bones with time give an increasing play between artificial part and bone, which in turn result in a necessary change of the artificial part, which also normally includes the shortening of the bone to obtain sufficiently good material to fasten the artificial part in. After a few changes of the artificial part so little of the bone will remain that the joint has to be made ridgid due to the lack of bone material.
A further drawback of the known artificial part this far is that the inner cavity of the bone is not available for the formation of vessels in a natural way, which presumably further reduces the life spann of the mounting of a artificial part and thus of the artificial part itself.
The invention has as it's object to solve the above mentioned problem and provide a simply useable artificial part fastening or mounting that is easy to apply, that does not need to be exchanged and that allows an improved bleed- ing. This is in accordance with the invention achieved by means of a supporting structure that is inserted into the axial cavity of the bone and by this supporting structure beeing provided with bristles, fibres, loops or the like with such length that the combined dia etre of the device is somewhat larger than the cavity in the bone so that at least
some of the bristles, fibres or loops or the like 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 which will give a greater resistance against withdrawal than against the insertion. It will in fact be practically impossible to withdraw the fastening element. Preferably the number of bristles, fibres or the corresponding is very great. In this way a very great contact surface between bone and artificial part fastening element is obtained simultaneously as an adaption is automatically made to possible irregularities on the inside of the bone.
By furthermore fabricating the bristles, fibres or loops in titanium the bone and the artificial part fastening element will grow together and will so to say be integrated with time. Bleeding and the development of vessels can take place between the bristles or loops and it is furthermore possible to make the supporting structure more or less porous or open. Since the tensions are less further in the bone the fastening element can there be more open or be provided with less bristles. The length of the bristles and the density thereof are above all ruled by the forces that has to be transferred and the density of the bristles need not necessarily be the same over the entire length of the fastening element.
If bristles of titanium is used, thin but many bristles can be used in view of the hard and stiff character of titanium. Instead of titanium however titanium containing alloys coated by titanium can be used and it is also possible to consider plastic materials coated with titanium.
The bristles can from the start be directed radially or possibly somewhat rearwards or it is of course possible that omly some of them are.
The supporting structure need not necessary 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 forth and back.
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 with time since the contact surface is great and thus the specific load small.
It should be observed that the fastening means descri- bed above can also be used for the jointing of brooken bones .
Further details and advantages of the invention are apparent from the following description of a prefered embo¬ diment and the claims. Fig 1 shows a joint seen from the front and fig 2 the same joint seen from the side, both in a longitudinal section.
The artificial joint shown in the drawings includes a bowl or concave joint part 4 and a ball concave joint part 3 each fastened in a bone 1 and 2 respectively. The lower part, the ball part 3 is welded to two wires 5 of titanium which from diametrical pheriferial fastening points extend towards each other, then to continue in a winding around each other. Between the windings of these two wires 5 thin threadlike bristles 6, also of titanium are clamped. The bristles 6 have such a length that they on inser¬ tion into the bone 2 will be bent somewhat upwards. This means that they will not excert any particular resistance against the intruducing into the bone. However the resist¬ ance against possible attempts to withdraw the artificial joint part from the bone will be very great. By useing a great number of bristles a good fastening against a turning of the artificial joint part relative the bone is achieved.
The ball joint part 3 has a circumferencial downwards protruding flange 7 gripping around the bone 2 on it's cor- respondingly shaped end 8. In this way the artificial joint
part will be locked against possible tilting, with the bristles and the titanium wires pressing the ball joint part against the bone 2.
Possibly the inner of the ball joint part 5 can be filled with silicon at the mounting alternatively can the inner be entirely empty. By useing pure titanium or titanium alloys or other materials coated with titanium or perhaps even other materials which can grow together with the bone an integration is achieved with time. In this way not only the immediate sturdy fixing is obtained but also a long time fixing.
The upper joint bowl part or concave part 4 has a shape corresponding to the shape of the ball joint part 5 so that an angular movement is possible. The surfaces turned against each other has principly the shape of cylinder or sphere surfaces where the lower ball joint part 5 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 dislocation sidewise. By di- mensioning the interrelated length of groove and 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 against titanium gives a low friction. An example of this is HDP (high density polyetylen) that has shown itself to be a material that work well with human tissues. In the bowl part 4 a dove tail groove 12 extends sidewτise and into this -grips an correspondingly shaped dove tail 14 that in turn is a part of a titanium plate 13. Preferably the titanium plate and the joint bowl part 3 of HDP are provided with snap means so that the lateral location when well achieved is secured. To the plate 13 is then welded wires 15 which are then wound to a spiral that holds bristles 16 in the same way as has been described above for the lower ball shaped joint part. Also the titanium disk or plate 15 is provided with a flange 17
gripping around a corresponding shaping 18 of the bone 1.
By use of a dove tail joint to join the joint ball part with it's fastening means the advantage is obtained that with comparatively simple means the joint bowl part can easily be exchanged if it for instance after many years of use becomes too worn and this with an operation that is far easier and less complicated and time consu eing than would be the case if one would have to exchange the entire artificial joint or artificial joint part. Of course also the lower ball joint part can be made in a corresponding way to allow a change of the part subjected to wear. This can for instance take place by means of a dove tail joint with the interl ocation of a plastic part. By useing plastic for one half of the joint and possibly as a joining element in the lower part a certain elasticity against shock is achieved which reduce tensions in other joints as well as in the fastening of the artificial joint.
It should be observed that the flanges 7, 17 and the corresponding shaping of the bone ends respectively need not necessarily be exactly after the outer shape of the bone, but to fasciliate working it is of course also possible to use flanges that are circular for instance concentric wi h the axis of the wound titanium wires.
The joint has on each side a ligament 19. By means of the invention an artificial joint or joint parts is achieved for big as well as small joints that are very similiar to the desired relationships of the original joint .
Since the fastening according to the invention in prin¬ ciple is or can be made elastic over it's entire length there will be no tension peaks where the artificial part ends which is a regretful case with many known artificial joint parts.
Due to the improved fastening characteristics and the soft transferring of forces from the artificial part to the
bone it is actually possible to make replacements of another character that has previously been possible. Due to the pre¬ viously poor fastening characteristics the artificial part has always had to be comparatively short in order not to have too great torques excerted on the remaining bone part. With the invention the remaining bone wτill not be subjected to forces greater than the bone originally could take. The¬ refore an artificial joint part according to the invention can be longer which in turn means that the previous shorte- ning of bones will become unnecessary.
In the drawings has been shown the use of two wires for fastening the bristles. More wires than two can of course be used and it is also possible to use a supporting structure carrying the bristles that is shaped in another way. For in- stance the bristles could be fastened in a cast plastic structure.
If the supporting structure has a stiffness that re¬ duces towards the _inner of the cavity the transferring of forces from and to the joint will take place without signi- ficant tension peaks.
In the above example two wires have been used to clamp or fasten the bristles, of course a greatur number o britles can also be used. Furthermore if an other type of supporting structure of for instance plastic is used a porous or open structure can also be employed.
Claims
1. Fastening means for fastening an artificial joint part or another bone part characterized in that from an into the bone insertable supporting structure extends bristles, fibres, loops or the like with such a length that a greater outer diameter is achieved than that of the cavity in the bone into which the device is intended to be inserted so that the bristles, fibres or loopes or some of them receive a certain pretens ioning at the mounting angling these away from the direction of insertion.
2. Means according to claim 1, characterized in that the number of bristles, fibres, or loops is great.
3. Means according to claim 1 or 2, characterized in that the bristles, fibres or loops are made of titanium.
4. Means according to claim 1 or 2, characterized in that the bristles, fibres or loops are made of titanium alloys or other materials coated with titanium.
5. Means according to claim 1 characterized in that the supporting structure is fastened to a disk that on mounting of the fastening means is to be located against the end of the bone.
6. Means according to claim 5 characterized in that the disk has flanges or protrusions extending towards the bone and intended to cooperate with a corresponding shaping of the end of the bone.
7. Means according to claim 5 or 6 , characterized in that via a dove tail joint is an artificial joint part directly or indirectly secureable to the disk or plate.
8. Means according to claim 7, characterized in that the dove tail joint extend perpendicular to the bending plane of the joint.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP89902092A EP0400035B1 (en) | 1988-01-28 | 1989-01-27 | Device at artificial joints |
DE68917464T DE68917464T2 (en) | 1988-01-28 | 1989-01-27 | ARRANGEMENT OF ARTICLES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8800274A SE466237B (en) | 1988-01-28 | 1988-01-28 | CUTTING DEVICE CREATES TO A BONE PIPE CUTTING ANOTHER BONE PIPE OR PROTEST |
SE8800274-6 | 1988-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989006946A1 true WO1989006946A1 (en) | 1989-08-10 |
Family
ID=20371203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1989/000025 WO1989006946A1 (en) | 1988-01-28 | 1989-01-27 | Device at artificial joints |
Country Status (7)
Country | Link |
---|---|
US (2) | US5061288A (en) |
EP (1) | EP0400035B1 (en) |
JP (1) | JPH03502287A (en) |
AT (1) | ATE109648T1 (en) |
DE (1) | DE68917464T2 (en) |
SE (1) | SE466237B (en) |
WO (1) | WO1989006946A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993000053A1 (en) * | 1991-06-25 | 1993-01-07 | Orthopaedic Biosystems Limited | Non-constrained total joint system |
FR2705559A1 (en) * | 1993-05-28 | 1994-12-02 | Lafosse Laurent | Finger joint prosthesis with shield |
US5370700A (en) * | 1993-02-19 | 1994-12-06 | Sarkisian; James S. | Prosthetic knee joint |
WO1995007060A1 (en) * | 1993-09-07 | 1995-03-16 | Franz Copf | Prosthesis for small joints |
FR2743717A1 (en) * | 1996-01-23 | 1997-07-25 | Maksene Philippe | Phalangeal articulation prosthesis |
GB2308068B (en) * | 1995-12-11 | 1999-09-15 | Merck Biomaterial France | Total phalangeal joint prosthesis |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9304093L (en) * | 1993-12-09 | 1995-05-02 | Nobelpharma Ab | Device for promoting bone growth |
US5522900A (en) * | 1993-12-17 | 1996-06-04 | Avanta Orthopaedics | Prosthetic joint and method of manufacture |
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 endoprosthesis |
US20110166671A1 (en) | 2006-11-07 | 2011-07-07 | Kellar Franz W | Prosthetic joint |
WO2008058205A1 (en) * | 2006-11-07 | 2008-05-15 | Biomedflex, Llc | Medical implants |
US8308812B2 (en) | 2006-11-07 | 2012-11-13 | Biomedflex, Llc | Prosthetic joint assembly and joint member therefor |
US8070823B2 (en) * | 2006-11-07 | 2011-12-06 | Biomedflex Llc | Prosthetic ball-and-socket joint |
US9005307B2 (en) | 2006-11-07 | 2015-04-14 | Biomedflex, Llc | Prosthetic ball-and-socket joint |
US8029574B2 (en) * | 2006-11-07 | 2011-10-04 | Biomedflex Llc | Prosthetic knee joint |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064567A (en) * | 1976-09-15 | 1977-12-27 | The Sampson Corporation | Prosthesis-to-bone interface system |
EP0024008A1 (en) * | 1979-08-10 | 1981-02-18 | Bayer Ag | Dental implant |
DE3536894A1 (en) * | 1984-11-09 | 1986-05-15 | České vysoké učení technické v Praze, Prag/Praha | Hip joint endoprosthesis |
DE3613657A1 (en) * | 1986-04-23 | 1987-11-05 | Walter A Dr Med Laabs | Endoprosthesis |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2339123A (en) * | 1940-09-13 | 1944-01-11 | Volckening Inc | Bottle cleaning device |
SU728855A1 (en) * | 1977-05-05 | 1980-04-25 | Firer Aleksandr M | Artificial tooth |
US4114504A (en) * | 1977-07-25 | 1978-09-19 | George Koregelos | Demoisturizer for wind musical instruments |
NL8204714A (en) * | 1982-12-06 | 1984-07-02 | Michael Andreas Ton | IMPLANT, AND BOTH PROSTHESIS, ATTACHED TO ONE OR MORE IMPLANTS. |
US4681590A (en) * | 1986-06-18 | 1987-07-21 | John Tansey | Femoral stem prosthesis |
-
1988
- 1988-01-28 SE SE8800274A patent/SE466237B/en unknown
-
1989
- 1989-01-27 DE DE68917464T patent/DE68917464T2/en not_active Expired - Fee Related
- 1989-01-27 JP JP1501920A patent/JPH03502287A/en active Pending
- 1989-01-27 US US07/548,958 patent/US5061288A/en not_active Ceased
- 1989-01-27 AT AT89902092T patent/ATE109648T1/en not_active IP Right Cessation
- 1989-01-27 WO PCT/SE1989/000025 patent/WO1989006946A1/en active IP Right Grant
- 1989-01-27 EP EP89902092A patent/EP0400035B1/en not_active Expired - Lifetime
-
1992
- 1992-07-07 US US07/910,825 patent/USRE34632E/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064567A (en) * | 1976-09-15 | 1977-12-27 | The Sampson Corporation | Prosthesis-to-bone interface system |
EP0024008A1 (en) * | 1979-08-10 | 1981-02-18 | Bayer Ag | Dental implant |
DE3536894A1 (en) * | 1984-11-09 | 1986-05-15 | České vysoké učení technické v Praze, Prag/Praha | Hip joint endoprosthesis |
DE3613657A1 (en) * | 1986-04-23 | 1987-11-05 | Walter A Dr Med Laabs | Endoprosthesis |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993000053A1 (en) * | 1991-06-25 | 1993-01-07 | Orthopaedic Biosystems Limited | Non-constrained total joint system |
US5370700A (en) * | 1993-02-19 | 1994-12-06 | Sarkisian; James S. | Prosthetic knee joint |
FR2705559A1 (en) * | 1993-05-28 | 1994-12-02 | Lafosse Laurent | Finger joint prosthesis with shield |
EP0639360A1 (en) * | 1993-05-28 | 1995-02-22 | Laurent Lafosse | Finger articulation prosthesis with one dish shaped element |
WO1995007060A1 (en) * | 1993-09-07 | 1995-03-16 | Franz Copf | Prosthesis for small joints |
US5776202A (en) * | 1993-09-07 | 1998-07-07 | Copf; Franz | Joint prosthesis |
GB2308068B (en) * | 1995-12-11 | 1999-09-15 | Merck Biomaterial France | Total phalangeal joint prosthesis |
FR2743717A1 (en) * | 1996-01-23 | 1997-07-25 | Maksene Philippe | Phalangeal articulation prosthesis |
US5728163A (en) * | 1996-01-23 | 1998-03-17 | Maksene; Philippe | Phalangeal joint prosthesis |
Also Published As
Publication number | Publication date |
---|---|
SE466237B (en) | 1992-01-20 |
EP0400035B1 (en) | 1994-08-10 |
JPH03502287A (en) | 1991-05-30 |
USRE34632E (en) | 1994-06-07 |
SE8800274L (en) | 1989-07-29 |
ATE109648T1 (en) | 1994-08-15 |
EP0400035A1 (en) | 1990-12-05 |
SE8800274D0 (en) | 1988-01-28 |
US5061288A (en) | 1991-10-29 |
DE68917464T2 (en) | 1995-02-09 |
DE68917464D1 (en) | 1994-09-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1989006946A1 (en) | Device at artificial joints | |
US4041550A (en) | Artificial patella and method of repairing a natural patella | |
US4608055A (en) | Femoral component for hip prosthesis | |
JP2579320B2 (en) | Prosthesis assembly kit | |
CA2006272C (en) | Femoral head adaptor for interoperative assembly | |
US5035716A (en) | Replacement disc | |
US3894297A (en) | Hip joint prosthesis | |
JP3746290B2 (en) | Modular prosthesis | |
JPS6115866Y2 (en) | ||
JPH01288254A (en) | Femur prosthesis | |
WO2002036026A3 (en) | Connector for spinal rod and vertebral anchor | |
US20020081553A1 (en) | Dental endosseous implant | |
ATE167382T1 (en) | ANCHORING ELEMENT FOR HOLDING JOINT PROSTHESIS FOR A RESTORED JOINT | |
CA2198414A1 (en) | Jointless artificial foot | |
CA2271800A1 (en) | Intervertebral prosthetic device | |
CA2109850A1 (en) | Anchoring element for anchorage in bone tissue | |
JP2005523735A (en) | Dental implants and the like comprising a core and a ceramic sleeve that are joined together by gluing | |
WO1988005648A1 (en) | Amputation apparatus | |
DE3469271D1 (en) | Artificial joint cavity | |
ATE47659T1 (en) | DENTAL IMPLANT. | |
US5728153A (en) | Stentless heart valve surgical support device | |
JP2605110B2 (en) | Acetabular cup | |
AU4072297A (en) | Coupling for porous resin orbital implant and ocular prosthesis | |
US4253834A (en) | Rider clip with offset retention flaps and retention bar for denture | |
DE3373266D1 (en) | Dental prosthetic anchor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1989902092 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1989902092 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1989902092 Country of ref document: EP |