EP1635720A1 - Double machoire a fermeture elastique pour fixateur externe - Google Patents

Double machoire a fermeture elastique pour fixateur externe

Info

Publication number
EP1635720A1
EP1635720A1 EP03729780A EP03729780A EP1635720A1 EP 1635720 A1 EP1635720 A1 EP 1635720A1 EP 03729780 A EP03729780 A EP 03729780A EP 03729780 A EP03729780 A EP 03729780A EP 1635720 A1 EP1635720 A1 EP 1635720A1
Authority
EP
European Patent Office
Prior art keywords
rod
clamping
jaws
jaw
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03729780A
Other languages
German (de)
English (en)
Inventor
Peter Brunner
Marcel Fuhrer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Synthes GmbH
Original Assignee
Synthes AG Chur
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 Synthes AG Chur filed Critical Synthes AG Chur
Publication of EP1635720A1 publication Critical patent/EP1635720A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/645—Devices extending alongside the bones to be positioned comprising a framework
    • 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
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod

Definitions

  • the invention relates to a device for releasably clamping fasteners within a surgical fixation or
  • a double jaw connection for elements of an external fixator is known from DE 295 12 917 JAQUET.
  • This known hinge connection consists of a layered arrangement of two pairs of jaws, which consists of an upper outer jaw and an upper inner jaw and a lower, inner jaw and a lower, outer jaw.
  • the four jaws are arranged on a central clamping shaft.
  • a coil spring is inserted, which causes the two inner jaws are pressed apart and against the outer jaws.
  • Notches are provided on the clamping surfaces between each pair of jaws which form a passage for fixing rods or connectors of the external fixator transversely to the clamping shaft. These passages are open to the outside and allow the insertion of the mounting rods or connectors by applying pressure to the opening of the jaw in the respective passage against the action of the elastic means. After snapping the mounting bars or connectors into the passageways, they are held in place by the action of the resilient means before the hinge connection is definitively blocked.
  • the invention aims to remedy this situation.
  • the invention has for its object to provide a device for releasably clamping fasteners such as rods, retractors, rings or bone screws, which a) has one elastic element per pair of jaws, so that an independent operation of the two jaw pairs is possible; b) has fewer components compared to the prior art, so that a simple operation and cleaning is possible; and c) has a constant spring force (without nut / screw operation).
  • the invention solves the stated object with a device for releasably clamping fasteners within a surgical fixation or reduction device, which has the features of claim 1.
  • the jaws have continuous, coaxial to the longitudinal axis holes. These holes serve to receive the rod so that the jaws are arranged axially displaceably on the rod.
  • the rod has radial clearance in the bore of at least one jaw of each jaw pair, so that at least one jaw per jaw pair can be tilted out of the position coaxial with the longitudinal axis of the rod.
  • the rod has a diameter d in the axial region of the clamping jaws and the bore of at least one clamping jaw has a diameter D per clamping jaw pair, and that D> d.
  • the ratio (D-d) / d may be between 0.01 and 0.10.
  • the rod has at least one notch in the axial region of the clamping jaws, so that the rod has a minimum thickness b at the notches.
  • the bore of at least one jaw per jaw pair has a diameter D, where b ⁇ D.
  • the at least one notch may for example also be designed as an annular groove.
  • notches are provided on the clamping surfaces which lie between on opposite sides of the two jaws each belonging to a jaw pair. By these notches channels are formed for receiving rod-shaped fastening means.
  • the indentations are transverse and eccentric to the longitudinal axis of the rod.
  • the channels each have a channel axis which is perpendicular to the longitudinal axis of the rod and has a distance A to this.
  • the elastic means with respect to the longitudinal axis, are arranged on the side of the clamping jaws opposite the channel.
  • the elastic means are spaced from the longitudinal axis of the rod with a distance B between the central axis of the elastic means and the longitudinal axis of the rod.
  • the elastic means are designed as a rod-shaped element with a central axis parallel to the longitudinal axis of the rod.
  • the elastic means it is preferable to use those made of a material having a non-linear stress-strain diagram.
  • the elastic means may advantageously be made of a memory metal alloy, preferably nitinol, but without their clamping effect being due to the memory effect. For this reason, the memory metal alloy can have a transition temperature higher than
  • the transition temperature is higher than 100 °, preferably higher than 120 °. Also suitable are so-called pseudoelastic materials.
  • the elastic means may consist not only of metallic materials but also of a plastic, preferably polyetheretherketone (PEEK) or a carbon fiber reinforced PEEK.
  • PEEK polyetheretherketone
  • at least one clamping means of a threaded connection wherein preferably a nut is screwed on a thread on the rod.
  • a screw could also be screwed into a hole having an internal thread.
  • the second clamping means may be a head fixedly connected to the rod or a second threaded connection.
  • annular disc is arranged between the inner clamping jaws of the two jaw pairs.
  • the disk can be displaceable coaxially with the longitudinal axis on the rod, or be integral with the rod.
  • the channels are preferably cylindrical or prismatic, which can produce an increased clamping effect on the rod-shaped attachment means. This is all the more so when the channels, viewed in the cross-section orthogonal to the channel axis, surround the rod-shaped fastening elements at an angle of ⁇ > 180 °.
  • the ratio B / LW between the minimum width B of a channel at the orthogonal to the channel axis opening on the side surfaces of the jaws of the LW LW Channels preferably between 70% and 90%.
  • Show it: 1 shows a longitudinal section through an embodiment of the inventive device.
  • FIG. 2 shows a longitudinal section through another embodiment of the inventive device.
  • FIG. 3a shows a side view of the embodiment of the device according to the invention shown in FIG. 2;
  • FIGS. 2 and 3a is a front view of the embodiment shown in FIGS. 2 and 3a of the inventive device.
  • the embodiment shown in Fig. 1 comprises a bar 1 having two bar segments 19, 20 with a longitudinal axis 2 and on each bar segment 19, 20 axially displaceable each a pair of jaws 4; 5.
  • Each of the two jaw pairs 4, 5 comprises an inner jaw 6, 7 and an outer jaw 8, 9.
  • the jaws 6, 7, 8, 9 are coaxial with the longitudinal axis bores 16; 17 provided and in pairs on each a bar segment 19, 20 axially displaceable.
  • the inner clamping jaws 6, 7 rest on the end faces 22, 23 which are orthogonal to the longitudinal axis 2 and have an annular disc 37 fixedly arranged between the rod segments 19, 20.
  • the outer jaws 8, 9 are by means of clamping means 10, 11 against the inner jaws 6, 7 can be pressed.
  • the tensioning means 10; 11 are nuts 18, which are screwed on terminally arranged thread 24 on the two bar segments 19, 20.
  • both the two clamping jaws 6, 8 of the first clamping jaw pair 4 and the two clamping jaws 7, 9 of the second clamping jaw pair 5 each have a clamping surface 29, 30, 31, 32 which is transverse to the longitudinal axis 2.
  • a rod-shaped fastening means 12 can be disposed transversely to the longitudinal axis 2; Insert 13 and when tightening the clamping means 10; 11 between each an inner and an outer jaw 6, 7, 8, 9 block.
  • notches 25 are attached to two mutually opposite clamping surfaces 29, 30, 31, 32.
  • the notches 25 are orthogonal to the longitudinal axis 2 and are spaced therefrom.
  • the cross-sectional area of Notches 25 is here circular segment-shaped, but may also be triangular.
  • the notches 25 each form a between the two jaws 6, 7, 8, 9 of each jaw pair 4, 5 extending, against the side surfaces 28 of the jaws 6, 7, 8, 9 open channel 33, 34 with an orthogonal to the longitudinal axis 2 and of this spaced channel axis 35; 36.
  • the two channels 33, 34 have a cross-sectional area orthogonal to the channel axis 35, 36 in the form of a unilaterally flattened circular area, the width LW of each channel 33, 34 being greater than the width B of the respective channel axis 35 36 orthogonal standing opening of the corresponding channel 33, 34 on the side surfaces of the jaws 6, 7, 8, 9.
  • each jaw pair 4, 5 comprises elastic means 40, whereby the two jaws 6, 7, 8, 9 belonging to a jaw pair 4, 5 are held axially at a certain distance.
  • the distance between the two clamping jaws 6, 7, 8, 9 belonging to a clamping jaw pair 4, 5 is dimensioned such that between the adjoining clamping surfaces 29, 30, 31, 32 of each clamping jaw pair 4, 5 a rod-shaped fastening means 12; 13 transversely to the longitudinal axis 2 by hand can be inserted.
  • the in this way with dissolved clamping means 10; 11 inserted rod-shaped fastening means 12; 13 are then clamped by the elasticity of the elastic means 40 between the clamping surfaces 29, 30, 31, 32 so that they are still displaceable parallel to their central axes 26, 27 by hand.
  • Nitinolstäbe 41 As elastic means 40 two Nitinolstäbe 41 are inserted between the two jaws 6, 7, 8, 9 of each of the jaw pairs 4, 5 spaced from the rod 1.
  • the Nitinolstäbe 41 have central axes 42 and are pressed into holes 43.
  • For introducing the rod-shaped fastening means 12; 13 in the channels 33, 34 are each two corresponding jaws 6, 7, 8, 9 of each of the jaw pairs 4, 5 spread on their provided with the notches 25 sides, so that the two Clamping jaws 6, 7, 8, 9 of each clamping jaw pair 4, 5 are pressed against one another on their side provided with the elastic means 40 and the nitinol rods 41 are elastically deformed.
  • the respective outer clamping jaws 8, 9 are provided with bores 17 coaxial with the longitudinal axis 2, whose diameter D is greater than the diameter d of the bar 1 in FIG this axial area.
  • FIGS. 2, 3a and 3b show an embodiment which differs from the embodiment shown in FIG.
  • first clamping means 10 is designed as a threaded connection with a screwed on the thread 24 at the first end 14 of the rod 1 nut 18, while the second clamping means 11 comprises a second end 15 of the rod 1 fixed head 60.
  • the outer jaw 9 of the second jaw pair 5 then comes to the head 60 axially to the plant;
  • the two jaw pairs 4, 5 can be pressed against the head 60 and the rod-shaped fastening elements 12, 12 inserted between the jaws 6, 7, 8, 9 of each clamping jaw pair 4, 5. 13 in the channels 33, 34 clamp.
  • the rod-shaped fastening element 12 is pushed so far into the channel 33 transversely to the longitudinal axis 2, that the two adjacent to the channel 33 Jaws 6, 8 with a spread angle ß of about 2 ° to 3 ° maximum spread.

Abstract

L'invention concerne un dispositif pour serrer de manière libérable des éléments de fixation (12;13) dans un dispositif chirurgical de fixation ou de reposition. Ce dispositif comprend: A) une barre (1) cylindrique ou prismatique dotée d'un axe longitudinal (2), d'une première extrémité (14), d'une deuxième extrémité (15) ainsi que d'un premier segment (19) de barre terminal adjacent à la première extrémité (14) et d'un deuxième segment (20) de barre terminal adjacent à la deuxième extrémité (15); B) une première paire de mâchoires de serrage (4) coulissant sur le premier segment (19) de barre de manière coaxiale à l'axe longitudinal (2); C) une deuxième paire de mâchoires de serrage (5) coulissant sur le deuxième segment (20) de barre de manière coaxiale à l'axe longitudinal (2); sachant que D) les deux paires de mâchoires de serrage (4;5) comportent chacune une mâchoire de serrage interne (6;7) et une mâchoire de serrage externe (8;9) orientée vers les extrémités (14;15), les deux mâchoires de serrage (6;7;8;9) de chaque paire (4;5) comportant des surfaces de fixation (29;30;31;32) antagonistes; E) un élément de serrage (10;11) servant à serrer de manière libérable des éléments de fixation (12;13) dans un dispositif chirurgical de fixation ou de reposition est monté entre deux surfaces de fixation (29;30;31;32) antagonistes; et F) un élément élastique (40) monté entre une mâchoire de serrage interne et une mâchoire de serrage externe (6;8;7;9) relie ces mâchoires de serrage (6,8;7,9).
EP03729780A 2003-06-26 2003-06-26 Double machoire a fermeture elastique pour fixateur externe Withdrawn EP1635720A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2003/000424 WO2004112625A1 (fr) 2003-06-26 2003-06-26 Double machoire a fermeture elastique pour fixateur externe

Publications (1)

Publication Number Publication Date
EP1635720A1 true EP1635720A1 (fr) 2006-03-22

Family

ID=33520334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03729780A Withdrawn EP1635720A1 (fr) 2003-06-26 2003-06-26 Double machoire a fermeture elastique pour fixateur externe

Country Status (13)

Country Link
US (1) US9492198B2 (fr)
EP (1) EP1635720A1 (fr)
JP (1) JP4542034B2 (fr)
CN (1) CN100553575C (fr)
AR (1) AR044793A1 (fr)
AU (1) AU2003240364B2 (fr)
BR (1) BR0318329A (fr)
CA (1) CA2530721C (fr)
CL (1) CL2004001387A1 (fr)
NZ (1) NZ544276A (fr)
TW (1) TWI335811B (fr)
WO (1) WO2004112625A1 (fr)
ZA (1) ZA200509571B (fr)

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US6613049B2 (en) 2000-02-02 2003-09-02 Robert A. Winquist Adjustable bone stabilizing frame system
EP1635720A1 (fr) 2003-06-26 2006-03-22 SYNTHES AG Chur Double machoire a fermeture elastique pour fixateur externe
US7891075B2 (en) * 2005-01-19 2011-02-22 Gm Global Technology Operations, Inc. Reconfigurable fixture device and method for controlling
US8523858B2 (en) 2005-06-21 2013-09-03 DePuy Synthes Products, LLC Adjustable fixation clamp and method
US20070038217A1 (en) * 2005-08-09 2007-02-15 Brown Daniel G Orthopaedic fixation clamp and method
US7708736B2 (en) 2006-02-22 2010-05-04 Extraortho, Inc. Articulation apparatus for external fixation device
ES2471948T3 (es) 2006-10-13 2014-06-27 Stryker Trauma Sa Prevención de reutilización de un dispositivo m�dico
EP3067001B1 (fr) * 2007-09-27 2019-04-17 Zimmer, Inc. Appareil de serrage pour stabilisation et fixation externe
US8187274B2 (en) * 2008-06-30 2012-05-29 Depuy Products, Inc. External fixator
EP2399532A1 (fr) * 2010-06-24 2011-12-28 Franz Bentele Machoire pour un fixateur externe et articulation utilisant de telles machoires
WO2012003455A1 (fr) 2010-07-01 2012-01-05 Extraortho, Inc. Collier de fixation externe à verrouillage multiple
CN101905269B (zh) * 2010-07-23 2012-09-05 中国重型机械研究院有限公司 一种双线自动升降夹紧装置
EP2627273B1 (fr) 2010-10-12 2017-03-01 Zimmer, Inc. Clamp chirurgical de fixation externe comportant un pivot
WO2012051312A1 (fr) 2010-10-12 2012-04-19 Extraortho, Inc. Agencement de pince de fixation externe à verrou unique
US8728078B2 (en) 2010-11-04 2014-05-20 Zimmer, Inc. Clamping assembly with links
WO2012078897A1 (fr) 2010-12-09 2012-06-14 Extraortho, Inc. Verrou rotatif pour clamps de fixation externe
EP2648633B1 (fr) 2010-12-09 2016-05-18 Zimmer, Inc. Mâchoire actionnée par came pour pinces de fixation externes
US9277937B2 (en) 2011-05-17 2016-03-08 Zimmer, Inc. External fixation clamp using a trigger mechanism and stored spring energy
EP2692303A1 (fr) 2012-07-30 2014-02-05 Swiss Ortho Trauma SA Mâchoire pour un fixateur externe et articulation utilisant de telles mâchoires
US9408635B2 (en) * 2013-03-15 2016-08-09 Wright Medical Technology, Inc. External fixation
DE102013103587B3 (de) * 2013-04-10 2014-05-22 Rattunde & Co Gmbh Zwillingsspanner
US10682160B2 (en) 2015-12-03 2020-06-16 Globus Medical, Inc. External fixator assembly
US10136919B2 (en) 2015-12-03 2018-11-27 Globus Medical, Inc. External fixator assembly
US9943337B2 (en) 2015-12-03 2018-04-17 Globus Medical, Inc. External fixator assembly
US9872707B2 (en) 2015-12-03 2018-01-23 Globus Medical, Inc. External fixator assembly
JP7142876B2 (ja) * 2018-08-28 2022-09-28 岡山市 フランジ補強治具およびその取付方法
RU194458U1 (ru) * 2019-06-03 2019-12-11 Общество С Ограниченной Ответственностью "Орто-Сув" Устройство для фиксации костных фрагментов
FR3121343A1 (fr) * 2021-03-31 2022-10-07 J.P.P. Management Pinces et kit pour structure de fixation externe orthopedique

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Also Published As

Publication number Publication date
TW200501914A (en) 2005-01-16
US20060255521A1 (en) 2006-11-16
AR044793A1 (es) 2005-10-05
US9492198B2 (en) 2016-11-15
WO2004112625A1 (fr) 2004-12-29
CN1787786A (zh) 2006-06-14
JP4542034B2 (ja) 2010-09-08
AU2003240364A1 (en) 2005-01-04
CN100553575C (zh) 2009-10-28
ZA200509571B (en) 2006-12-27
AU2003240364B2 (en) 2008-09-18
TWI335811B (en) 2011-01-11
NZ544276A (en) 2010-02-26
CL2004001387A1 (es) 2005-03-18
CA2530721C (fr) 2012-04-10
JP2007505267A (ja) 2007-03-08
CA2530721A1 (fr) 2004-12-29
BR0318329A (pt) 2006-07-11

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