DK159953B - EXTERNAL SHIELD FIX - Google Patents

EXTERNAL SHIELD FIX Download PDF

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Publication number
DK159953B
DK159953B DK064485A DK64485A DK159953B DK 159953 B DK159953 B DK 159953B DK 064485 A DK064485 A DK 064485A DK 64485 A DK64485 A DK 64485A DK 159953 B DK159953 B DK 159953B
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DK
Denmark
Prior art keywords
rod
jaw
clamping
carriage
clamping member
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DK064485A
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Danish (da)
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DK64485A (en
DK64485D0 (en
DK159953C (en
Inventor
Giovanni De Bastiani
Lodovico Renzi Brivio
Roberto Aldegheri
Giovanni Faccioli
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Orthofix Srl
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Publication of DK64485D0 publication Critical patent/DK64485D0/en
Publication of DK64485A publication Critical patent/DK64485A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/66—Alignment, compression or distraction mechanisms

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Prostheses (AREA)

Description

DK 159953 BDK 159953 B

Opfindelsen vedrører eksterne miniaksialfiksurer som nævnt i krav l's indledende del, navnlig sådanne der specielt er indrettet til styret fiksering af små -knogler, såsom finger- eller tåknogler, mellemhåndsknogler 5 eller mellemfodsknogler.The invention relates to external mini-axial fixings as mentioned in the preamble of claim 1, in particular those specially designed for controlled fixation of small bones, such as finger or toe bones, middle bones 5 or middle feet bones.

U.S.A. patentskrift nr. 4 312 336 beskriver en monolateral ekstern fikstur med flere detaljer og træk, der giver kirurgen stor fleksibilitet, når fiksturen skal anvendes i forskellige knoglefikseringssituationer, 10 navnlig når der er tale om store knogler. Denne ret komplekse og store fikstur er uanvendelig til fiksering af små knogler i en hånd eller en fod. Selv om denne patenterede fikstur ganske enkelt udføres i mindre målestok, vil den ikke opfylde kirurgens krav om enkelthed, styr-15 ke, knogleforankring og forlængelse i en situation med brækkede eller på anden måde beskadigede småknogler.U.S.A. Patent No. 4,312,336 discloses a monolateral external fixture with several details and features which gives the surgeon great flexibility when the fixture is to be used in various bone fixation situations, especially in the case of large bones. This rather complex and large fixture is useless for fixing small bones in one hand or foot. Although this patented fixture is simply performed on a smaller scale, it will not meet the surgeon's requirements for simplicity, strength, bone anchoring and extension in a situation of broken or otherwise damaged bones.

Opfindelsen tager sigte på at anvise en forbedret minifikstur af den nævnte art.The invention is intended to provide an improved mini trip of the kind mentioned.

Et særlig mål er at tilvejebringe en fikstur med 20 stiftbeslag til at give monolateral understøtning af to adskilte områder af en lille knogle, hvor alle akserne for knogleindgreb ligger i et enkelt plan, og hvor dette koplanare forhold opretholdes under en knogleforlængelsesproces, såsom under en diafysisk knogleforlæn-25 gelse, condroepifysisk distraktion, tab af knoglesubstans, syntetisering af ledbrud i hånden, arthritis, aksiale afvigelser af fingrene såvel som i tilfælde af hallux valgus, metatarsus primus varus og lignende.A particular goal is to provide a fixture with 20 pin fittings to provide monolateral support for two separate areas of a small bone, all of which are the axes for a single plane, and this coplanar relationship is maintained during a bone extension process, such as during a diaphysical bone extension, chondroephysical distraction, loss of bone substance, synthesis of hand joints, arthritis, axial deviations of the fingers as well as in the case of hallux valgus, metatarsus primus varus and the like.

Dette opnås ifølge opfindelsen med en ikke-led-30 delt minifikstur med to spændeorganer, der er ejendommelig ved det i krav l's kendetegnende del angivne. Herved opnås, at det ene spændeorgan bliver således styret under sin bevægelse, at de med begge spændeorganerne forbundne stifter bibeholder deres koplanare forhold.This is achieved according to the invention with a non-articulated mini-trip with two clamping means which is characterized by the characteristic part of claim 1. This results in the fact that one clamping member is controlled during its movement so that the pins associated with both clamping means maintain their coplanar relationship.

35 Foretrukne udførelsesformer af fiksturen ifølge opfindelsen ses i underkravene.Preferred embodiments of the fixture according to the invention are seen in the subclaims.

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2 I det følgende beskrives en foretrukket udførelsesform for opfindelsen nærmere under henvisning til tegningen, hvor fig. 1 viser et planbillede af fiksturen ifølge 5 opfindelsen med de fastspændte stifter delvis afskåret, fig. 2 et snit langs linien 2-2 i fig. 1, fig. 3 et snit som i fig. 2, men med en modifikation, og fig. 4 og 5 delsnit visende yderligere modifika- 10 tioner.2 In the following, a preferred embodiment of the invention is described in more detail with reference to the drawing, in which FIG. 1 shows a plan view of the fixture according to the invention with the clamped pins partially cut off; FIG. 2 is a section along the line 2-2 of FIG. 1, FIG. 3 is a sectional view similar to FIG. 2, but with a modification, and fig. 4 and 5 are sections showing further modifications.

Den illustrerede eksterne minifikstur omfatter en langagtig metalstang 3, hvis ydre form stort set er parallelepipedisk. Den ene ende af stangen 3 er integreret med et fremspring 4, der udgør den stationære 15 kæbe af et spændeorgan 5, hvis anden kæbe 6 kan fastgøres til kæben 4 ved hjælp af en bolt 7. Kæberne 4 og 6's mod hinanden vendende flader har adskilte, parallelle cylindriske spor til imellem sig at optage og lokalisere skafterne, af to stifter 8-. Stifterne 8's 20 skafter er cylindriske og sikkert fastspændt indbyrdes parallelt, når bolten 7 mellem dem er spændt til.The illustrated external minifigure comprises a longitudinal metal rod 3 whose outer shape is substantially parallelepipedic. One end of the rod 3 is integral with a projection 4 constituting the stationary jaw of a clamping member 5, the other jaw 6 of which can be secured to the jaw 4 by means of a bolt 7. The faces of the jaws 4 and 6 facing each other are spaced apart. , parallel cylindrical grooves for recording and locating the shafts, of two pins 8-. The shafts of the pins 8 are cylindrical and securely clamped in parallel when the bolt 7 between them is tightened.

Det andet spændeorgan 9 er styret forskydeligt langs stangen 3 og omfatter to kæber 10 og 11, der har tilsvarende rilleforsynede, mod hinanden vendende 25 flader og en enkelt bolt 7' derimellem til sikker fastspænding af yderligere to stifter 8's skafter.The second clamping member 9 is slidably guided along the rod 3 and comprises two jaws 10 and 11 having corresponding grooved, facing 25 faces and a single bolt 7 'therebetween for securely clamping the shafts of two more pins 8.

Til styret justerbar positionering af det forskydelige spændeorgan 9 har stangen 3 et langsgående spor 13, der forløber mellem stangens lukkede ender og 30 mellem adskilte parallelle sideelementer eller skinner 13' og en nedad forløbende vogn eller styreblok 12, der er ud i ét med kæben 10, er styret i sporet 13. Blokken 12 har en langsgående gevindboring, der til stadighed står i indgreb med en gevindskåret aksel 14, 35 og akslen 14 er med frihed til at rotere lejret i de respektive lukkede ender af stangen 3, idet akslen kanFor controlled adjustable positioning of the displaceable clamping member 9, the rod 3 has a longitudinal groove 13 extending between the closed ends of the rod and 30 between separate parallel side members or rails 13 'and a downwardly extending carriage or guide block 12 integral with the jaw 10 , is guided in the groove 13. The block 12 has a longitudinal threaded bore which is constantly engaged with a threaded shaft 14, 35 and the shaft 14 is free to rotate the bearing at the respective closed ends of the rod 3, the shaft being able to

DK 159953 BDK 159953 B

3 drejes via sin ene frie ende. En tværstift 14', der er indsat i en boring i den ende af stangen 3, der har den stationære kæbe 4, er en smule forskudt for skæring med akslen 14's længdeakse, men er i indgreb med et rundt-5 gående spor i enden af akslen 14 og sikrer således denne mod aksial forskydning uden at hindre dens rotationsfrihed.3 is turned via its one free end. A transverse pin 14 'inserted into a bore at the end of the rod 3 having the stationary jaw 4 is slightly offset for intersection with the longitudinal axis of shaft 14, but engages a circumferential groove at the end of shaft 14, thus securing it against axial displacement without obstructing its freedom of rotation.

Drejning og dermed indstilling af akslen 14 forskyder blokken 12 i længderetningen og dermed også 10 det bevægelige spændeorgan 9 med dettes fastspændte stifter 8. Under en sådan forskydning støttes kæben 10 i længderetningen i kraft af sit konstante glidende anlæg (ved 15) mod stangen 3's adskilte skinner, således at det koplanare forhold bibeholdes for de i begge spæn-15 deorganerne 5 og 9 indspændte stifter 8, uanset den indstillede position af spændeorganet 9. · I en meget fordelagtig udførelsesform for opfindelsen, der er anvendelig ved monolateral fiksering af små knogler, distraktion eller kompression, er stangen 20 8 cm lang, 1,2 cm bred og 0,8 cm tyk, og tværsnittet af sporet 13 til stabil styring af blokken 12 er kvadratisk med en kantlængde på 0,8 cm. Hvert af spændeor-ganerne 5 og 9 er beregnet til fastholdelse af to identiske stifter 8 med et mellemrum på 1,2 cm, og 25 disse stifter er passende selvskærende standardskruer til kirurgibrug, eksempelvis 40 mm x 1,5 mm eller 50 mm x 1,8 mm og med cylindriske skafter med en diameter på 2,5 mm. Der er tyve gevind/cm på akslen 14, og den mulige forskydning af spændeorganet 9 er omtrent 30 4 cm.Rotating and thus adjusting the shaft 14 displaces the block 12 longitudinally and thus also the movable clamping member 9 with its clamped pins 8. During such displacement, the jaw 10 is supported longitudinally by virtue of its constant sliding abutment (at 15) against the separate of the rod 3. rails so that the coplanar relationship is maintained for the pins 8 embedded in both clamping members 5 and 9, regardless of the set position of clamping member 9. In a very advantageous embodiment of the invention applicable to monolateral fixation of small bones, distraction or compression, the bar 20 is 8 cm long, 1.2 cm wide and 0.8 cm thick, and the cross-section of the groove 13 for stable control of the block 12 is square with an edge length of 0.8 cm. Each of the clamping members 5 and 9 is intended to hold two identical pins 8 at a space of 1.2 cm and these pins are suitable standard self-tapping screws for surgery, for example 40 mm x 1.5 mm or 50 mm x 1 , 8 mm and with cylindrical shafts 2.5 mm in diameter. There are twenty threads / cm on shaft 14 and the possible displacement of clamping member 9 is approximately 30 cm.

Den beskrevne opfindelse vil ses at opfylde de satte mål og udgør en vigtig fikseringshjælp for kirurgen. I tilfælde af selvskærende kirurgiskruer 8 er der ikke behov for at bore, men hvis det foretrækkes at bo-35 re, skal de to spændeorganer 5 og 9 først indstilles i den ønskede afstand, og deres spændebolte 7 og 7’ ind-The disclosed invention will be seen to meet the set goals and constitute an important fixing aid for the surgeon. In the case of self-tapping surgical screws 8, there is no need to drill, but if it is preferred to drill, the two clamping members 5 and 9 must first be adjusted to the desired distance and their clamping bolts 7 and 7 'inserted.

DK 159953 BDK 159953 B

4 stilles, så de danner borestyr (ved stiftrillerne) til præcis styring af boreoperationen.4 are positioned so that they form drill guides (by the pin grooves) for precise control of the drilling operation.

Den beskrevne minifikstur er med succes anvendt i forbindelse med finger- og tåknogler, mellemhåndsknogler 5 og mellemfodsknogler samt i forbindelse med de følgende kliniske og kirurgiske områder: (a) Diafysisk knogleforlængelse, (b) hemipifyseal distraktion, (c) tab af knoglesubstans, og 10 (d) syntetisering af ikke-leddelte brud.The described mini-trip has been successfully used in connection with finger and toe bones, middle bones 5 and middle feet bones, as well as in the following clinical and surgical areas: (D) synthesizing non-joint fractures.

Selv om opfindelsen er beskrevet detaljeret i en foretrukket udførelsesform må det forstås, at den kan modificeres uden at gå uden for opfindelsens rammer. Eksempelvis kan der være låseorganer til at sikre akslen 15 14 mod rotation, ligesom der kan være en sætskrue i den ene af akslen 14's ender. Kæben 5' kan som vist i fig. 3 også være mage til kæben 9 og altså også være forskydelig i længderetningen langs sporet 13, i hvilket tilfælde det foretrækkes, at akslen 14' ' har mod-20 sat rettede gevind 14a, 14b, i sine to synlige længdehalvdele. De respektive spændeorganer 5' og 9's blokke 12 vil i dette tilfælde så have boringer med modsat rettede gevind 14a, 14b i indgreb med de respektive længdehalvdele af akslen 14'', således at drejning af aks-25 len 14'' vil medføre distraktions- eller kompressionsforskydning af begge spændeorganerne 5' og 9 samtidig.Although the invention is described in detail in a preferred embodiment, it is to be understood that it can be modified without departing from the scope of the invention. For example, there may be locking means for securing shaft 15 14 against rotation, and there may be a set screw at one of the ends of shaft 14. The jaw 5 'can, as shown in FIG. 3 may also be similar to the jaw 9 and thus also be longitudinally displaceable along the groove 13, in which case it is preferred that the shaft 14 '' has opposed directed threads 14a, 14b, in its two visible longitudinal halves. The blocks 12 of the respective clamping members 5 'and 9 will in this case then have bores with opposite threads 14a, 14b in engagement with the respective longitudinal halves of the shaft 14' ', so that rotation of the shaft 14' 'will cause distraction. or compression displacement of both clamping means 5 'and 9 simultaneously.

Som det ses i fig. 3, fås den yderligere fordel, at akslen 14'' nu kan betjenes med en skruenøgle i begge en der.As seen in FIG. 3, the additional advantage is obtained that the shaft 14 '' can now be operated with a wrench in both of them.

30 Videre vil det som vist i fig. 4 og 5 fremgå, at der kan tilføjes en mulighed for vinkeldrejning af stifterne 8, der holdes i spændeorganet 5'' og/eller spændeorganet 9. I fig. 4 er de halvcylindriske spor, der lokaliserer stifterne 8 i forhold til det statio-35 nære fremspring 4, udført med en mellemliggende kæbeplade eller -skive 4'', der i ikke-sammenspændt til-Further, as shown in FIG. 4 and 5, it is apparent that an opportunity can be added for angular rotation of the pins 8 held in the clamping member 5 '' and / or the clamping member 9. In FIG. 4, the semi-cylindrical grooves locating the pins 8 relative to the stationary projection 4 are provided with an intermediate jaw plate or disc 4 '' which in non-clamped connection

Claims (5)

10 Mere specifikt er de halvcylindriske spor, der lokaliserer stifterne 8 i forhold til glideblokken 12'', udført i en mellemliggende kæbeplade eller -skive 12''', der i ikke-sammenspændt tilstand er drejelig om spændebolten 7' som følge af en glideflade 17 imellem delene 15 12" og 12" ' .More specifically, the semi-cylindrical grooves locating the pins 8 with respect to the sliding block 12 '' are made in an intermediate jaw plate or disc 12 '' which is rotatably rotatable about the clamping bolt 7 'by a sliding surface. 17 between parts 15 12 "and 12" '. 1. Ekstern miniaksialfikstur, navnlig egnet til brug ved forlængelse og omfattende en parallelepipedisk metalstang (3) med to spændeorganer (5, 9) til fasthol-20 delse af stifter (8), hvor hvert spændeorgan består af to kæber (4, 6; 10, li), der kan lukkes mod hinanden ved hjælp af en bolt (7,7'), kendetegnet ved, at mindst ét af spændeorganerne (9) er forskydeligt langs stangens længdeakse og på en af sine kæber (10) har en 25 vogn (12), som er forskydelig i en åbning (13) ved drejning af en gevindskåren aksel (14), der forløber gennem en med samme gevind forsynet åbning i vognen (12), og at kæbens (10) nedre del har flader (15) til anlæg mod stangen.An external mini-axial fixture, particularly suitable for use in extension and comprising a parallelepipedic metal rod (3) with two clamping means (5, 9) for holding pins (8), each clamping member consisting of two jaws (4, 6; 10, li), which can be closed against each other by means of a bolt (7,7 '), characterized in that at least one of the clamping means (9) is displaceable along the longitudinal axis of the rod and has one of its jaws (10). carriage (12) which is displaceable in an opening (13) by turning a threaded shaft (14) extending through an equally threaded opening in the carriage (12) and the lower portion of the jaw (10) having faces ( 15) for abutment against the rod. 2. Fikstur ifølge krav l, kendetegnet ved, at det bevægelige spændeorgans (9) kæbe (10) er drejelig i forhold til vognen (12) om en akse vinkelret på åbningens (13) længdeakse og kan låses i den valgte stilling.Fixing according to claim 1, characterized in that the jaw (10) of the movable clamping member (9) is rotatable relative to the carriage (12) about an axis perpendicular to the longitudinal axis of the opening (13) and can be locked in the selected position. 3. Fikstur ifølge krav 1 eller 2, kende tegnet ved, at spændeorganets (5" ) kæbe {4 " ) er DK 159953B drejelig i forhold til stangen (3) om en akse vinkelret på stangens (3) længdeakse og kan låses i den valgte stilling.The fixture according to claim 1 or 2, characterized in that the jaw (4 ") of the clamping member (5") is rotatable relative to the rod (3) about an axis perpendicular to the longitudinal axis of the rod (3) and can be locked in it. selected position. 4. Fikstur ifølge krav 1, kendetegnet 5 ved, at begge spændeorganernes (5,9) stiftakser ligger i det samme plan.Fixing according to claim 1, characterized in that the pin axes of both clamping means (5,9) are in the same plane. 5. Fikstur ifølge ét af de forrige krav, kendetegnet ved, at også spændeorganet (5') er forskydeligt langs længdeaksen af stangen (3), idet en kæbe 10 (4') tilhørende spændeorganet (51) er forsynet med en vogn (12'), der er forskydelig i åbningen (13) på den gevindskårne aksel (14'1), der løber gennem en gevindboring i vognen (12'), at kæben (4') har mindst én anlægsflade (15') til styring af forskydningen ved anlæg mod 15 stangen (3), og at den gevindskårne aksel (14'*) på sine respektive langsgående halvdele opviser modsat gevind (14a, 14b), idet spændeorganet (9) er i indgreb med gevindet (14a), og spændeorganet (5') er i indgreb med gevindet (14b). \Fixing according to one of the preceding claims, characterized in that the clamping means (5 ') is also displaceable along the longitudinal axis of the rod (3), a jaw 10 (4') of the clamping means (51) being provided with a carriage (12). ') which is displaceable in the opening (13) of the threaded shaft (14'1) running through a threaded bore in the carriage (12') that the jaw (4 ') has at least one abutment surface (15') for controlling the displacement at abutment against the rod (3) and the threaded shaft (14 '*) on its respective longitudinal halves having opposite threads (14a, 14b), the clamping member (9) engaging the thread (14a) and the clamping member (5 ') engages the thread (14b). \
DK064485A 1984-02-13 1985-02-12 EXTERNAL SHIELD FIX DK159953C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8490984 1984-02-13
IT84909/84A IT1183736B (en) 1984-02-13 1984-02-13 EXTERNAL MINI-FIXER, PARTICULARLY SUITABLE FOR USE AS AN EXTENDER

Publications (4)

Publication Number Publication Date
DK64485D0 DK64485D0 (en) 1985-02-12
DK64485A DK64485A (en) 1985-08-14
DK159953B true DK159953B (en) 1991-01-07
DK159953C DK159953C (en) 1991-06-03

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DK064485A DK159953C (en) 1984-02-13 1985-02-12 EXTERNAL SHIELD FIX

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JP (1) JPS60232151A (en)
AT (1) AT391266B (en)
AU (1) AU567651B2 (en)
BE (1) BE901716A (en)
CH (1) CH666399A5 (en)
DE (1) DE3504616A1 (en)
DK (1) DK159953C (en)
ES (1) ES8605967A1 (en)
FR (1) FR2559380B1 (en)
GB (1) GB2154144B (en)
IT (1) IT1183736B (en)
LU (1) LU85769A1 (en)
NL (1) NL192191C (en)
NO (1) NO850540L (en)
PT (1) PT79947A (en)
SE (1) SE8500624L (en)
ZA (1) ZA851002B (en)

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Publication number Publication date
JPS60232151A (en) 1985-11-18
NL8500391A (en) 1985-09-02
DE3504616C2 (en) 1987-06-19
GB8503461D0 (en) 1985-03-13
ES8605967A1 (en) 1986-04-01
GB2154144B (en) 1987-01-07
CH666399A5 (en) 1988-07-29
AU567651B2 (en) 1987-11-26
DK64485A (en) 1985-08-14
ATA40585A (en) 1990-03-15
IT8484909A0 (en) 1984-02-13
GB2154144A (en) 1985-09-04
BE901716A (en) 1985-08-12
IT1183736B (en) 1987-10-22
AT391266B (en) 1990-09-10
AU3859485A (en) 1985-08-22
DE3504616A1 (en) 1985-08-14
NL192191B (en) 1996-11-01
PT79947A (en) 1985-03-01
ZA851002B (en) 1985-09-25
NL192191C (en) 1997-03-04
DK64485D0 (en) 1985-02-12
SE8500624D0 (en) 1985-02-12
LU85769A1 (en) 1985-07-24
NO850540L (en) 1985-08-14
ES540339A0 (en) 1986-04-01
JPS6155977B2 (en) 1986-11-29
FR2559380A1 (en) 1985-08-16
DK159953C (en) 1991-06-03
FR2559380B1 (en) 1988-05-20
SE8500624L (en) 1985-08-14

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