SE464961B - LED PROTES, IN PARTICULAR, FINGER LEADERS - Google Patents

LED PROTES, IN PARTICULAR, FINGER LEADERS

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Publication number
SE464961B
SE464961B SE8903838A SE8903838A SE464961B SE 464961 B SE464961 B SE 464961B SE 8903838 A SE8903838 A SE 8903838A SE 8903838 A SE8903838 A SE 8903838A SE 464961 B SE464961 B SE 464961B
Authority
SE
Sweden
Prior art keywords
joint
joint prosthesis
prosthesis according
sleeve
wire
Prior art date
Application number
SE8903838A
Other languages
Swedish (sv)
Other versions
SE8903838L (en
SE8903838D0 (en
Inventor
B Persson
Original Assignee
Volvo Ab
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
Application filed by Volvo Ab filed Critical Volvo Ab
Priority to SE8903838A priority Critical patent/SE464961B/en
Publication of SE8903838D0 publication Critical patent/SE8903838D0/en
Priority to PCT/SE1990/000734 priority patent/WO1991007149A1/en
Priority to JP3500310A priority patent/JPH04503025A/en
Priority to EP90917283A priority patent/EP0502039A1/en
Publication of SE8903838L publication Critical patent/SE8903838L/en
Publication of SE464961B publication Critical patent/SE464961B/en

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
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • 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
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30566—Helical springs
    • 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
    • A61F2002/30574—Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
    • 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
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30624—Hinged joint, e.g. with transverse axle restricting the movement
    • 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
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A61F2002/4243—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for interphalangeal joints, i.e. IP 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
    • 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
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Description

15 20 25 30 35 464 961 2 vid leden enligt uppfinningen bildar således en skruvfjäder- anordning den elastiska förbindelsen mellan bendelarna. Tråd- materialet, tråddiametern och antalet varv bestämmer fjäder- kraften och fjädringsvägen eller ledvinkeln, vilket gör det möjligt att enkelt styra dessa parametrar, så att en led kan åstadkommas, som även bidrar till att öka rörligheten hos reumatiker. vid en föredragen utföringsform av ledprotesen enligt upp- finningen utnyttjas två skruvformigt lindade fjädertrådar. som är så iskruvade i varandra, att den ena trådens varv ligger mellan den andra trådens varv. vardera tråden har en ände förbunden med det ena fästelementet och en andra ände förbunden med det andra fästelementet på sådant sätt, att var- dera fästelementet är förbundet med bägge trådarna vid ändarna av det bildade fjäderpaketet. Genom ett sådant utförande und- vikes det tippmoment, som annars utövas på en enkel spiral, om trådändarna vid spiralens motsatta ändar förbindes med var sitt fästelement. vid utförandet enligt uppfinningen med dubbla fjädrar och "diagonala" infästníngar motverkar tipp- momenten varandra, så att fjäderkraften blir symmetrisk med avseende på ledens längsgående centrumlinje. At the joint according to the invention, a helical spring device thus forms the elastic connection between the leg parts. The wire material, wire diameter and number of turns determine the spring force and the suspension path or joint angle, which makes it possible to easily control these parameters, so that a joint can be achieved, which also helps to increase the mobility of rheumatologists. in a preferred embodiment of the joint prosthesis according to the invention, two helically wound spring wires are used. which are so screwed into each other that the turns of one wire lie between the turns of the other wire. each wire has one end connected to one fastener and a other end connected to the other fastener in such a way that each fastener is connected to both wires at the ends of the formed spring package. By such an embodiment, the tipping moment, which is otherwise exerted on a simple spiral, is avoided if the wire ends at the opposite ends of the spiral are connected to each fastening element. in the embodiment according to the invention with double springs and "diagonal" fastenings, the tipping moments counteract each other, so that the spring force becomes symmetrical with respect to the longitudinal center line of the joint.

Uppfinningen beskrives nedan under hänvisning till på bifogade ritningar visade utföringsexempel, där fig. 1 visar en schema- tisk röntgenbild av ett finger med en ledprotes enligt upp- finningen inopererad i en av fingerlederna, fig. 2 en perspek- tivvy av en utföringsform i schematisk framställning för att illustrera uppfinningsprincipen och fig. 3 och 4 ett längd- - respektive tvärsnitt genom en föredragen utföringsform.The invention is described below with reference to exemplary embodiments shown in the accompanying drawings, in which Fig. 1 shows a schematic X-ray image of a finger with a joint prosthesis according to the invention implanted in one of the finger joints, Fig. 2 a perspective view of an embodiment in schematic production to illustrate the principle of the invention and Figs. 3 and 4 show a longitudinal and a cross-section, respectively, through a preferred embodiment.

I fig. 1 betecknar l och 2 två ben i ett finger. Benens mot varandra vända ändar har avkapats för att ge plats för en generellt med 3 betecknad ledprotes. som består av en ledkropp 4, ett par rostfria plattor 5 och ett par rostfria stift 6a.In Fig. 1, 1 and 2 denote two legs in one finger. The ends of the legs facing each other have been cut off to make room for a joint with a 3 designated joint prosthesis. consisting of a hinge body 4, a pair of stainless steel plates 5 and a pair of stainless steel pins 6a.

Stiften 6a är instuckna i borrningar i titanstift 6b, som tidigare ínopererats och vuxit fast i bendelarna. 10 15 20 25 30 35 464 961 Den principiella uppbyggnaden och funktionen hos själva led- kroppen 4 illustreras i fig. 2. Ledkroppen innefattar en cylindrisk bärare 7, på vilken två metalltrådar 8 och 9 av fjäderstål. t ex av rostfritt 18/8 stål. är skruvformigt lin- dade på sådant sätt, att trådarna är iskruvade i varandra.The pins 6a are inserted into bores in titanium pins 6b, which have previously been implanted and grown into the leg parts. The basic structure and function of the hinge body 4 itself is illustrated in Fig. 2. The hinge body comprises a cylindrical support 7, on which two metal wires 8 and 9 of spring steel. eg stainless steel 18/8 steel. are helically wound in such a way that the wires are screwed into each other.

Trådarna är vidare lindade, så att ingångsänden 10 respektive 11 och utgångsänden 12 respektive 13 hos respektive tråd är motriktade. Trådändarna 10-13 är parvis förbundna med ett par plattor 14, 15, vid vilka stift 6 är fixerade. Infästningen av trådändarna 10-13 på det beskrivna sättet resulterar i att de av trådarna 8, 9 bildade individuella skruvfjädrarna utsätts för motriktade tippande moment "a" och "b". som balanserar ut varfxdra vid ledrörelse i pilens "c" riktning.The wires are further wound, so that the input end 10 and 11, respectively, and the output end 12 and 13, respectively, of each wire are opposite. The wire ends 10-13 are connected in pairs with a pair of plates 14, 15, to which pins 6 are fixed. The attachment of the wire ends 10-13 in the manner described results in the individual coil springs formed by the wires 8, 9 being subjected to opposite tipping moments "a" and "b". which balances out the rotation during articulation in the "c" direction of the arrow.

I fig. 3 och 4 visas den í fig. 1 visade föredragna utförings- formen av ledprotesen i kraftigt förstorad skala. Detaljer med mots zrighet i fig. 1 och har erhållit samma hänvisninga- beteckningar som i dessa t ¿urer. Det praktiska utförandet i fig. 3 och 4 skiljer sig från det i fig. 2 visade principut- förandet i huvudsak endast genom att de platta infästnings- elementen i fig. 2 formats till ett par koncentríska hylsor 14 och 15. Dessa är företrädesvis framställda av rostfritt stål och har på sina mot varandra vända ytor 16, 17 en polyeten- beläggning, så att friktionen mellan hylsorna 14, 15 blir minimal vid den relativvridning som uppstår vid ledrörelsen. vid utförandet i fig. 3 är själva ledkroppen 4 separerad från stiften 6b och förbunden med dessa medelst en bajonettförbin- delse, som medger att leden lätt kan bytas om ett fel skulle e uppstå.Figures 3 and 4 show the preferred embodiment of the joint prosthesis shown in Figure 1 on a greatly enlarged scale. Details corresponding to Fig. 1 and have been given the same reference numerals as in these doors. The practical embodiment in Figs. 3 and 4 differs from the principle embodiment shown in Fig. 2 mainly only in that the flat fastening elements in Fig. 2 are formed into a pair of concentric sleeves 14 and 15. These are preferably made of stainless steel and has a polyethylene coating on its facing surfaces 16, 17, so that the friction between the sleeves 14, 15 becomes minimal in the relative rotation that occurs during the articulation movement. in the embodiment in Fig. 3, the hinge body 4 itself is separated from the pins 6b and connected to them by means of a bayonet connection, which allows the hinge to be easily replaced in the event of a fault.

För detta ändamål är vardera plattan 5 utformad med en tapp 18 respektive 19 med en fläns 30. Tapparna är fixerade i en borr- ning 20 respektive 21 i cylindern 14 respektive 15 och flän- sarna 30 i motsvarande urtagningar 31 i plattorna medelst stoppskruvar 32. Den yttre cylindern 14 är utformad med ett periferiellt genomgående spår 22, genom vilket den inre hyl- sans 15 tapp 19 sträcker sig och vars periferiella utsträck- 10 15 20 25 30 35 464 961 4 ning bestämmer den maximala ledvinkeln. vid det i fig. 3 visade utföringsexemplet är spåret så långt, att maximal led- vinkel blir ca 90°.For this purpose, each plate 5 is formed with a pin 18 and 19, respectively, with a flange 30. The pins are fixed in a bore 20 and 21, respectively, in the cylinder 14 and 15, respectively, and the flanges 30 in corresponding recesses 31 in the plates by means of stop screws 32. The outer cylinder 14 is formed with a circumferentially continuous groove 22, through which the pin 19 of the inner sleeve 15 extends and the circumferential extension of which determines the maximum articulation angle. in the exemplary embodiment shown in Fig. 3, the groove is so long that the maximum joint angle becomes approx. 90 °.

Trådfjädrarnas 8, 9 ändar 10 och ll respektive 12 och 13 är fixerade i den yttre och inre hylsan 14 respektive 15 efter samma mönster som i fig. 2. Respektive trädändar 10 och ll sträcker sig genom en periferiell, i den inre hylsan upptagen slits 23 (fig. 4). vars periferiella utsträckning motsvarar slitsens 22 utsträckning, och ut genom en borrning 24 i den yttre hylsan 14, där den är låst via ett omböjt parti. Respek- tive trådände 12 och 13 är fixerad i en borrning 25 (fig. 4) i den inre hylsan 15.The ends 10 and 11 and 12 and 13 of the wire springs 8, 9, respectively, are fixed in the outer and inner sleeve 14 and 15, respectively, in the same pattern as in Fig. 2. The respective tree ends 10 and 11 extend through a peripheral slot 23 accommodated in the inner sleeve. (Fig. 4). the circumferential extent of which corresponds to the extent of the slot 22, and out through a bore 24 in the outer sleeve 14, where it is locked via a bent portion. The respective wire ends 12 and 13 are fixed in a bore 25 (Fig. 4) in the inner sleeve 15.

Det av fjädertrådarna 8, 9 bildade fjäderpaketet kan antingen vara helt avlastat i ledens i fig. 3 visade. helt uträtade tillstånd eller lätt förspänt, så att den med innerhylsan 15 förbundna tappens 19 mantelyta pressas lätt mot spårets 22 övre ändkant 26. I det i fig. 3 och 4 visade läget. som allt- så representerar ledens uträtade tillstånd, finns ett litet spel "s" mellan trådvarven och cylinderns 7 ytteryta respek- tive innerhylsans 15 inneryta. Detta spel erfordras för att ge utrymme för skruvfjäderns 8 expansion och skruvfjäderns 9 kon- traktion vid ledrörelsen.The spring package formed by the spring wires 8, 9 can either be completely relieved in the joint shown in Fig. 3. fully straightened condition or slightly biased, so that the mantle surface of the pin 19 connected to the inner sleeve 15 is easily pressed against the upper end edge 26 of the groove 22. In the position shown in Figs. 3 and 4. which thus represents the straightened state of the joint, there is a small clearance "s" between the wire turns and the outer surface of the cylinder 7 and the inner surface 15 of the inner sleeve 15, respectively. This play is required to allow for the expansion of the coil spring 8 and the contraction of the coil spring 9 during the articulation movement.

Ovan har beskrivits en föredragen utföringsform, vid vilken trådarna 8, 9 är lindade kring en cylinder 7. Denna har en enda uppgift, nämligen att utgöra en inre begränsning av utrymmet för trådspiralerna för att hindra trådvarven från att interferera med varandra. Man kan dock tänka sig andra lös- ningar för att orientera trådvarven, så att cylindern kan slopas. Det är även teoretiskt möjligt att åstadkomma en äter- fjädrande led med en enda skruvfjäder. vilket dock inte ger den optimala lösning, som erhålles med det ovan beskrivna utförandet.A preferred embodiment has been described above, in which the wires 8, 9 are wound around a cylinder 7. This has a single task, namely to constitute an internal limitation of the space for the wire spirals in order to prevent the wire turns from interfering with each other. However, other solutions are conceivable for orienting the wire turns, so that the cylinder can be scrapped. It is also theoretically possible to provide a resilient joint with a single helical spring. which, however, does not provide the optimal solution obtained with the embodiment described above.

Claims (7)

10 15 20 25 30 35 464 961 Patentkrav10 15 20 25 30 35 464 961 Patent claims 1. Ledprotes, innefattande ett par i ledens bendelar inoperer- b' a fästelement samt en med fästelementen förbunden ledkropp (4), k ä n n e t e c k n a d av att ledkroppen innefattar minst en skruvformigt lindad fjädertråd (8, 9), som har en ände (10, 11) förbunden med det ena fästelementet (6, 14) och en andra ände (12, 13) förbunden med det andra fästelementet (6, 15).Joint prosthesis, comprising a pair in the leg parts of the joint inserting a fastening element and a hinge body (4) connected to the fastening elements, characterized in that the hinge body comprises at least one helically wound spring wire (8, 9), which has one end (10). , 11) connected to one fastener (6, 14) and a second end (12, 13) connected to the second fastener (6, 15). 2. Ledprotes enligt krav 1, k ä n n e t e c k n a d av att ledkroppen (4) innefattar en cylindrisk bärare (7), på vilken fjädertråden (8, 9) är lindad.Joint prosthesis according to claim 1, characterized in that the joint body (4) comprises a cylindrical carrier (7), on which the spring wire (8, 9) is wound. 3. Ledprotes enligt krav 1 eller 2, k ä n n e t e c k n a d av att ledkroppen (4) in-,fattar två skruvformigt lindade fjädertrådar (8, 9), som är så iskruvade i varandra, att den ena trädens varv ligger mellan den andra trädens varv, och att vardera tråden har en ände (10, 11) förbunden med det ena fästelementet (6, 14) och en andra ände (12, 13) förbunden med det andra fästelementet (6, 15).Joint prosthesis according to claim 1 or 2, characterized in that the joint body (4) comprises two helically wound spring wires (8, 9), which are screwed into each other so that the turns of one tree lie between the turns of the other tree. , and that each wire has one end (10, 11) connected to one fastening element (6, 14) and a second end (12, 13) connected to the other fastening element (6, 15). 4. Ledprotes enligt något av kraven 1-3. k ä n n e t e c k n a d av att ledkroppen (4) innefattar ett par koncentrískt lagrade, cylíndriska hylselement (14, 15), vilka omger den cylindriska bäraren (7), och att en ände (10. ll) av nämnda fjädertråd/trådar (8, 9)år så förbunden/förbund- na med en ena hylsan (14) och en andra ände (12, 13) med den andra hylsan (15), att hylsorna är vridbara relativt varandra mot verkan av den av fjädertråden/trådarna bildade skruv- fjäderns kraft.Joint prosthesis according to one of Claims 1 to 3. characterized in that the hinge body (4) comprises a pair of concentrically mounted, cylindrical sleeve elements (14, 15), which surround the cylindrical carrier (7), and that one end (10.1) of said spring wire (s) (8, 9) ) are so connected to one sleeve (14) and a second end (12, 13) to the other sleeve (15) that the sleeves are rotatable relative to each other against the action of the helical spring formed by the spring wire (s) force. 5. Ledprotes enligt krav 4. k ä n n e t e c k n a d av att fästelementen innefattar ett med vardera hylsan (14, 15) för- bundet stift (6, 19, 6, 20), vars i ledens bendelar (1, 2) inopererbara del består av titan, och att den yttre hylsan (14) uppvisar en i periferiell led löpande genomgående slits (22), genom vilken stiftet (19) i den inre hylsan (15) sträcker sig. 464 961 6Joint prosthesis according to claim 4, characterized in that the fastening elements comprise a pin (6, 19, 6, 20) connected to each sleeve (14, 15), the part of which in the leg parts (1, 2) of the joint can be inserted consists of titanium, and that the outer sleeve (14) has a circumferentially continuous slot (22) through which the pin (19) of the inner sleeve (15) extends. 464 961 6 6. Ledprotes enligt krav 4 eller 5, k ä n n e t e c k n a d av att hylsorna (14, 15) består av rostfritt stål och att deras mot varandra vända glídytor (16, 17) år belagda med ett polyetenskikt.Joint prosthesis according to claim 4 or 5, characterized in that the sleeves (14, 15) consist of stainless steel and that their sliding surfaces (16, 17) facing each other are coated with a polyethylene layer. 7. Ledprotes enligt något av kraven 1-6, k ä n n e t e c k n a d av att fjädertråden (8, 9) består av rostfritt stål och har en diameter på ca 0.5 mm. 11Joint prosthesis according to one of Claims 1 to 6, characterized in that the spring wire (8, 9) consists of stainless steel and has a diameter of approximately 0.5 mm. 11
SE8903838A 1989-11-15 1989-11-15 LED PROTES, IN PARTICULAR, FINGER LEADERS SE464961B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE8903838A SE464961B (en) 1989-11-15 1989-11-15 LED PROTES, IN PARTICULAR, FINGER LEADERS
PCT/SE1990/000734 WO1991007149A1 (en) 1989-11-15 1990-11-14 Artificial joint, especially for finger joints
JP3500310A JPH04503025A (en) 1989-11-15 1990-11-14 Artificial joints especially for finger joints
EP90917283A EP0502039A1 (en) 1989-11-15 1990-11-14 Artificial joint, especially for finger joints

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8903838A SE464961B (en) 1989-11-15 1989-11-15 LED PROTES, IN PARTICULAR, FINGER LEADERS

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SE8903838L SE8903838L (en) 1991-05-16
SE464961B true SE464961B (en) 1991-07-08

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EP (1) EP0502039A1 (en)
JP (1) JPH04503025A (en)
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WO (1) WO1991007149A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717071B1 (en) * 1994-03-11 1996-05-31 Procerati Joint prosthesis.
IT1277790B1 (en) * 1995-02-17 1997-11-12 Tecres Spa METACARPO-FALANGEA AND INTERPHALANGE PROSTHESES FOR HAND OR FOOT JOINTS
SE510125C2 (en) 1996-01-22 1999-04-19 Handevelop Ab A prosthetic device
US6383223B1 (en) 1997-06-18 2002-05-07 BAEHLER ANDRé Endoprosthesis for a joint, especially a finger, toe or wrist joint
AU2003213231A1 (en) 2002-02-25 2003-09-09 Elan Pharmaceuticals, Inc. Administration of agents for the treatment of inflammation
WO2012009735A1 (en) * 2010-07-16 2012-01-19 Vaal University Of Technology Articulating prosthesis
JP6093562B2 (en) * 2012-12-07 2017-03-08 株式会社トランストロン Displacement detector
JP2018526082A (en) * 2015-09-03 2018-09-13 シーエムシー サート エルティーディー． Prosthesis for human hand or foot joint replacement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350518A (en) * 1919-08-01 1920-08-24 Grant Prisbrey Artificial leg
US3990116A (en) * 1974-10-17 1976-11-09 Fixel Irving E Pretensioned prosthetic device for skeletal joints

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SE8903838L (en) 1991-05-16
JPH04503025A (en) 1992-06-04
SE8903838D0 (en) 1989-11-15
WO1991007149A1 (en) 1991-05-30
EP0502039A1 (en) 1992-09-09

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