WO1988001152A1 - A clamping device - Google Patents

A clamping device Download PDF

Info

Publication number
WO1988001152A1
WO1988001152A1 PCT/GB1987/000584 GB8700584W WO8801152A1 WO 1988001152 A1 WO1988001152 A1 WO 1988001152A1 GB 8700584 W GB8700584 W GB 8700584W WO 8801152 A1 WO8801152 A1 WO 8801152A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
clamping device
face
passageway
elements
Prior art date
Application number
PCT/GB1987/000584
Other languages
French (fr)
Inventor
John Clive Radwell
Original Assignee
Central Orthopaedics Ltd
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 Central Orthopaedics Ltd filed Critical Central Orthopaedics Ltd
Publication of WO1988001152A1 publication Critical patent/WO1988001152A1/en
Priority to DK216788A priority Critical patent/DK216788A/en
Priority to GB8903493A priority patent/GB2213733A/en

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
    • A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/12—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using sliding jaws
    • 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

Definitions

  • a Clamping Device FIELD OF THE INVENTION The present invention relates to an external fixator for orthopaedic use and in particular to the clamps for the guide rods and drilling pins of ' such fixators.
  • Weaponry used in modern warfare is capable of inflicting far more devastating wounds to exposed human limbs than those experienced in earlier times.
  • bullets used in today's army are designed to a far higher standard of aerodynamics, thus having a correspondingly greater propelling speed during passage to the target area.
  • the resultant high kinetic energy therefore of the modern moving bullet is such that on target impact, where the target is the human body, the transference of this energy to surrounding tissue results in widespread tissue damage, remote from the actual path of travel of the bullet through the body.
  • the bullet itself may not strike bone directly during penetration, neverthe ⁇ less, bone structure in the vicinity of the direct impact area may still suffer shatter and breakage.
  • a part of this effect is due to the phenomenon known as cavitation where the transference of energy creates a negative pressure within the tissue, creating enormous soft tissue damage, and sucking in pieces of debris which further complicate the injuries.
  • Severe bodily damage will also occur from other sources such as exploding shells and anti-personnel devices which also cause bone fractures with attendant heavy soft tissue damage.
  • fixators which are used to some effect in these adverse conditions.
  • they have to employ a bone cement to set the fixator pins which under low temperature conditions is slow to set thus placing a limit on versatility. Additionally once the cement is set later adjustment becomes impossible without intermittent breakage.
  • More sophisticated fixators are also available but for military purposes and in situations where there is a shortage of specialist skills and facilities, their usefulness is much reduced due to complexity of operation and limitations of use. They also tend to be expensive and too heavy.
  • a heavy stainless steel known fixator element employs a pair of U-shaped clamps, in the form of scaffolding clamps, one clamp being to hold the guide rod of the fixator, the other the fixing pin.
  • Each clamp is attached to a disc, the discs having serrated mating surfaces which permit relative rotation through 360°.
  • the clamps are tightened by means of a bolt passing through the limbs of the clamps and centrally of the discs in assembly.
  • Another known fixator uses stainless steel fixing elements comprised of at least two centrally tapped circular clamping discs having channels across one face of each disc.
  • a spacer disc is inserted between confronting faces of the discs in assembly, and clamping of the rod and pins is achieved by a nut and bolt passing axially of the discs through the central tappings.
  • a clamping device for the guide rods and drilling pins of an external bone fixator comprising at least two pairs of axially mounted clamping elements, at least one passageway formed between mutually confronting faces of said elements for receiving a said guide rod or pin, fastening means for fastening the elements together to secure the rod or pin in the passageway, and mutually engageable complementary formations between the confronting faces which interact to prevent relative rotation of said elements when in engagement across said confronting faces, and to resist separation thereof as the elements are fastened together around said rod or pin in the passageway.
  • a number (usually two) or pairs of the above defined interengageable clamping elements are mounted on a common axis and have radial serrations on their abutting faces which permit fixed engagement of the clamped disc pairs at any rotational position through 360°.
  • the above design may be made in a light weight material such as plastics while still meeting the needs of construc ⁇ tional reliability, versatility and adaptability demanded by modern fixators particularly in wartime situations.
  • Figure 1 is a side view of a clamping device of a bone fixator
  • Figure 2 is a sectional view through the clamping device of Figure 1, and including a clamping bolt inserted through the central tapping and of a second similar clamping device mounted in tandem;
  • Figure 3 is an end view of the clamping device of Figure 1 looking along the arrow A;
  • Figure 4 is an end view of the clamping device of Figure 1 looking along the arrow B;
  • Figure 5 and 6 are front views respectively of the confronting faces of the clamping device of Figure 1.
  • the clamping device shown in the drawings is composed of two clamping members 1 and 2.
  • the clamping member 1 is a flat circular plate made of a stiff plastics material as by injection moulding and defining two parallel flat circular faces 3 and 4 separated by a peripheral region 5.
  • An arcuate projection 6 extends out of the plane of the face 4 along its periphery. The projection 6 terminates at each end in flat surfaces 7 which lie in a plane perpendicular to the circular face 4.
  • the flat surfaces extend into the face 4 to the base wall or a recess 8, the upper wall 9 of which extends across the face 4.
  • the upper wall 9 is inwardly sloping and divergent with respect to the central axis of the circular plate 1.
  • the other clamping member 2 is formed of a flat circular plate made of a stiff plastics material and defining two parallel flat circular faces 10 and 11 separated by a peripheral region 12.
  • the plate 2 has the same diameter as plate 1 and shares a common axis in the engaged position shown in Figure 1.
  • the plate 2 has a sectored portion removed to form a flat face 13 perpendicular to the parallel faces 10 and 11, which rests across the flat surfaces 7.
  • a ledge 14 projects from the face 10 along the periphery of the flat face 13 to engage the recess 8.
  • the upper surface 15 of the ledge 14 slopes upwardly to the face 10 and convergent with respect to the common axis of the assembled clamping plates 1 and 2. so as to provide a complementary fit with the wall 9 of the recess 8.
  • the confronting faces 4 and 10 of the plates 1 and 2 each have a channel 16, which in the assembled position shown, mate to form a passageway 17 for reception of a guide rod or drilling pin of the fixator.
  • the plates 1 and 2 each have a centrally tapping 18 forming an axial passageway 19 for passage of a clamping bolt C shown in Figure 2.
  • the face 11 of the plate 2 has a square recess 20 on the axis of the passage 19 for receiving a corresponding squared head form on the shank of the clamping bolt.
  • the face 3 of the plate 1 has radial serrations S as shown in Figure 4.
  • a pair of clamping devices of the design shown in Figure 1 may be mounted on the clamping bolt C with their serrated faces in confrontation.
  • the passageway 17 in each clamping device designed to receive a guide rod and a drilling pin respeci-ively of a fixator With the passageway 17 in each clamping device designed to receive a guide rod and a drilling pin respeci-ively of a fixator, the juxtaposition of the rod and pi through 360° of rotation is then permissible by rotation of one fixing element with respect to the other on the se.rrations s «
  • the clamping bolt C is then tightened to draw tlie clamping elements together, from the slightly separated position shown in Figure 2, until the serrations engage at the desired relative rotational positions of the elements.
  • FIG. 7 A variant of the invention is shown in Figure 7. This is designed to facilitate the mounting of two pins or rods between the clamping members 19 and 20.
  • the confronting faces 21 and 22 each have two channels 23 and 24 to either side of a diametrical line of each said face.
  • a pair of mutually engageable complementary formations are formed between confronting faces 21 and 22, each similar to that formed between the confronting faces 4 and 10 of the Figures 1 to 6 embodiment, namely features 6, 7, 8, 9, 13, 14 and 15 depicted in those figures and herein fully described with reference thereto.

Abstract

A clamp for the pins and rods of a bone fixator made of a lightweight plastics material and comprising a pair of clamping discs (1, 2) mounted on a common axis. The pins and rods are held in a passageway (17) or passageways formed between the confronting faces (4, 10) of the discs. To resist separation and relative rotation of the discs (1, 2) as the discs (1, 2) are pulled together by an axially mounted clamping bolt, the confronting faces (4, 10) are provided with specially designed interengageable formations comprising a recess (8) across one face and a complementary projection (14) across the other face.

Description

A Clamping Device FIELD OF THE INVENTION The present invention relates to an external fixator for orthopaedic use and in particular to the clamps for the guide rods and drilling pins of' such fixators.
BACKGROUND OF THE INVENTION External bone fixators have been in use for many years, although recently there has been a marked revival of interest in their deployment in grievous accident situations particularly those occurring in warfare.
Weaponry used in modern warfare is capable of inflicting far more devastating wounds to exposed human limbs than those experienced in earlier times. For example, bullets used in today's army, are designed to a far higher standard of aerodynamics, thus having a correspondingly greater propelling speed during passage to the target area.
The resultant high kinetic energy therefore of the modern moving bullet is such that on target impact, where the target is the human body, the transference of this energy to surrounding tissue results in widespread tissue damage, remote from the actual path of travel of the bullet through the body. Thus although the bullet itself may not strike bone directly during penetration, neverthe¬ less, bone structure in the vicinity of the direct impact area may still suffer shatter and breakage.
A part of this effect is due to the phenomenon known as cavitation where the transference of energy creates a negative pressure within the tissue, creating enormous soft tissue damage, and sucking in pieces of debris which further complicate the injuries.
Severe bodily damage will also occur from other sources such as exploding shells and anti-personnel devices which also cause bone fractures with attendant heavy soft tissue damage.
The front line surgeon will therefore be confronted frequently with compound fractures incurring loss of bone stock and massive soft tissue damage in the fracture area. In many cases, his patient will have taken some time to reach him and infection will have set in. In addition to this the conditions in which the surgeon will be working will be poor with inferior lighting and general medical facilities. He will normally be working single handedly and not a specialist in the medical problems involved.
There do exist primitive fixators which are used to some effect in these adverse conditions. However they have to employ a bone cement to set the fixator pins which under low temperature conditions is slow to set thus placing a limit on versatility. Additionally once the cement is set later adjustment becomes impossible without intermittent breakage. More sophisticated fixators are also available but for military purposes and in situations where there is a shortage of specialist skills and facilities, their usefulness is much reduced due to complexity of operation and limitations of use. They also tend to be expensive and too heavy.
For example, a heavy stainless steel known fixator element employs a pair of U-shaped clamps, in the form of scaffolding clamps, one clamp being to hold the guide rod of the fixator, the other the fixing pin.
Each clamp is attached to a disc, the discs having serrated mating surfaces which permit relative rotation through 360°. The clamps are tightened by means of a bolt passing through the limbs of the clamps and centrally of the discs in assembly.
Another known fixator uses stainless steel fixing elements comprised of at least two centrally tapped circular clamping discs having channels across one face of each disc.
A spacer disc is inserted between confronting faces of the discs in assembly, and clamping of the rod and pins is achieved by a nut and bolt passing axially of the discs through the central tappings.
In respect of the former known fixator elements, it is only possible to clamp a single guide rod and fixing pin in the one fixing element, which is a distinct limitation.
Moreover its construction demands the use of a heavy and robust material to withstand the clamping forces necessary adequately to grip the object being clamped without the danger of catastrophic failure. In the latter case, while being a heavy object, assembly by use of spacer discs between the mating discs is unnecessarily messy. Additionally if a lighter weight material were to be used, for example, plastics, the grip on the objects being clamped would be less than desired due to the tendency of the material to yield outwardly around the objects being clamped, as the clamping force is applied axially of the clamping discs.
Furthermore, relative rotation of the discs is merely dependent on the clamping force exerted, so this tendency is ever prevalent especially where more than two discs are assembled together. This feature of itself, leads to disadvantage even with the known fixator, since whatever the clamping force applied, the later possibilities of relative rotational movement between the discs can never be ruled out.
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a fixator which is particularly useful for military purposes in all types of environments where conditions rule out the use of modern sophisticated and expensive fixators, and which does not suffer from their disadvantage and those of the basic bone cement fixators.
This object is achieved by employing specially designed light weight adjustable clamps for the guide rods and drilling pins of the fixator, in contrast to the heavy stainless steel fittings of prior devices. The employment of a light weight more flexible material such as plastics, demands a different type of construction than known heavier metallic fixing elements.
According to the invention there is provided a clamping device for the guide rods and drilling pins of an external bone fixator comprising at least two pairs of axially mounted clamping elements, at least one passageway formed between mutually confronting faces of said elements for receiving a said guide rod or pin, fastening means for fastening the elements together to secure the rod or pin in the passageway, and mutually engageable complementary formations between the confronting faces which interact to prevent relative rotation of said elements when in engagement across said confronting faces, and to resist separation thereof as the elements are fastened together around said rod or pin in the passageway.
Normally a number (usually two) or pairs of the above defined interengageable clamping elements are mounted on a common axis and have radial serrations on their abutting faces which permit fixed engagement of the clamped disc pairs at any rotational position through 360°.
The above design may be made in a light weight material such as plastics while still meeting the needs of construc¬ tional reliability, versatility and adaptability demanded by modern fixators particularly in wartime situations.
Particular advantages over the prior art lay in its attributes of being light in weight, rotational stabi- lity, and ability to cope with a random insertion of drilling pins, when arranged in tandem through such intact skin tissues as may be available.
In short, it has all the advantages of the prior art without its shortcomings.
Other advantages of the present invention will become apparent from the following description of a preferred embodiment given with reference to a number of drawings accompanying this specification. BRIEF DESCRIPTION OF THE DRAWINGS
The drawings accompanying the specification are as follows:
Figure 1 is a side view of a clamping device of a bone fixator; Figure 2 is a sectional view through the clamping device of Figure 1, and including a clamping bolt inserted through the central tapping and of a second similar clamping device mounted in tandem;
Figure 3 is an end view of the clamping device of Figure 1 looking along the arrow A;
Figure 4 is an end view of the clamping device of Figure 1 looking along the arrow B; and
Figure 5 and 6 are front views respectively of the confronting faces of the clamping device of Figure 1. BEST MODES OF CARRYING OUT THE INVENTION
The clamping device shown in the drawings is composed of two clamping members 1 and 2. The clamping member 1 is a flat circular plate made of a stiff plastics material as by injection moulding and defining two parallel flat circular faces 3 and 4 separated by a peripheral region 5. An arcuate projection 6 extends out of the plane of the face 4 along its periphery. The projection 6 terminates at each end in flat surfaces 7 which lie in a plane perpendicular to the circular face 4.
The flat surfaces extend into the face 4 to the base wall or a recess 8, the upper wall 9 of which extends across the face 4.
The upper wall 9 is inwardly sloping and divergent with respect to the central axis of the circular plate 1. The other clamping member 2 is formed of a flat circular plate made of a stiff plastics material and defining two parallel flat circular faces 10 and 11 separated by a peripheral region 12.
The plate 2 has the same diameter as plate 1 and shares a common axis in the engaged position shown in Figure 1.
The plate 2 has a sectored portion removed to form a flat face 13 perpendicular to the parallel faces 10 and 11, which rests across the flat surfaces 7. A ledge 14 projects from the face 10 along the periphery of the flat face 13 to engage the recess 8.
The upper surface 15 of the ledge 14 slopes upwardly to the face 10 and convergent with respect to the common axis of the assembled clamping plates 1 and 2. so as to provide a complementary fit with the wall 9 of the recess 8. The confronting faces 4 and 10 of the plates 1 and 2 each have a channel 16, which in the assembled position shown, mate to form a passageway 17 for reception of a guide rod or drilling pin of the fixator.
The plates 1 and 2 each have a centrally tapping 18 forming an axial passageway 19 for passage of a clamping bolt C shown in Figure 2.
The face 11 of the plate 2 has a square recess 20 on the axis of the passage 19 for receiving a corresponding squared head form on the shank of the clamping bolt. The face 3 of the plate 1 has radial serrations S as shown in Figure 4.
As illustrated in Figure 2, a pair of clamping devices of the design shown in Figure 1, may be mounted on the clamping bolt C with their serrated faces in confrontation. With the passageway 17 in each clamping device designed to receive a guide rod and a drilling pin respeci-ively of a fixator, the juxtaposition of the rod and pi through 360° of rotation is then permissible by rotation of one fixing element with respect to the other on the se.rrations s«
The clamping bolt C is then tightened to draw tlie clamping elements together, from the slightly separated position shown in Figure 2, until the serrations engage at the desired relative rotational positions of the elements.
As will be evident in Figure 2, the engagement of the ledge 14 in the recess 8 and the surface 13 across the surfaces 7, ensures rotational stability of the discs 1 and 2 in each disc pair and before the rod and pin have been inserted and clamped, and the interaction of these surfaces, including surfaces 9 and 15, constitutes a bearing resisting the forces of disc separation during clamping of the rods and pins.
A variant of the invention is shown in Figure 7. This is designed to facilitate the mounting of two pins or rods between the clamping members 19 and 20. In this case the confronting faces 21 and 22 each have two channels 23 and 24 to either side of a diametrical line of each said face.
A pair of mutually engageable complementary formations are formed between confronting faces 21 and 22, each similar to that formed between the confronting faces 4 and 10 of the Figures 1 to 6 embodiment, namely features 6, 7, 8, 9, 13, 14 and 15 depicted in those figures and herein fully described with reference thereto.

Claims

1. A clamping device for the guide rods and drilling pins of an external bone fixator comprising at least two pairs of axially mounted clamping elements, at least one passageway formed between mutually confronting faces of said elements to form a passageway for receiving a said guide rod or pin, fastening means for fastening said elements together thereby to secure the rod or pin in the passageway, and mutually engageable complementary formations between the confronting faces which interact to prevent relative rotation of said elements when in engagement across said confronting faces to resist separation thereof as the elements are fastened together around the rod or pin in the passageway.
2. A clamping device as claimed in claim 1 wherein said formations comprise a projection across one confronting face engaging a complementary recess across the other confronting face.
3. A clamping device as claimed in claim 2 wherein said projection has flat uppper and lower convergent surfaces for engaging corresponding flat upper and lower convergent surfaces of said recess.
4. A clamping device as claimed in claim 3 wherein the flat lower engaging surfaces of said projection and said recess are perpendicular to the plane of each said respective confronting face of said clamping elements .
5. A clamping device as claimed in any preceding claim wherein said passageway lies on one side of the axis of said clamping elements in assembly, and said formations on the other.
6. A clamping device as claimed in claim 5 wherein the longitudinal axes of said recess and said passageway are parallel to one another.
7. A clamping device as claimed in claim 6 wherein the clamping element provided with said recess is circular, one end face of which is provided with radial serrations for engagement with corresponding serrations on a said circular end face of the clamping element of another said clamping device held in axial tandem, the other end face being formed with a peripheral projection providing said flat lower engaging surface of said recess.
8. A clamping device as claimed in claim 7 wherein the outward extension of said peripheral extension is such that the forward end face thereof is in alignment with the end face of the said clamping element provided with said first mentioned projection on its other end face, whereby both said clamping elements form a mutually co-extensive peripheral surface in assembly.
9. A clamping device as claimed in any preceding claim provided with a said passageway and said complementary interengaging formations to either side of the axis of said clamping elements in assembly.
10. A clamping device as claimed in claim 9 wherein each said passageway is nearer to said axis than said complementary interengaging formations.
PCT/GB1987/000584 1986-08-22 1987-08-19 A clamping device WO1988001152A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK216788A DK216788A (en) 1986-08-22 1988-04-21 CLAMP BODY
GB8903493A GB2213733A (en) 1986-08-22 1989-02-16 A clamping device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868620504A GB8620504D0 (en) 1986-08-22 1986-08-22 Fixator
GB8620504 1986-08-22

Publications (1)

Publication Number Publication Date
WO1988001152A1 true WO1988001152A1 (en) 1988-02-25

Family

ID=10603132

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000584 WO1988001152A1 (en) 1986-08-22 1987-08-19 A clamping device

Country Status (5)

Country Link
EP (1) EP0321472A1 (en)
AU (1) AU7806787A (en)
DK (1) DK216788A (en)
GB (2) GB8620504D0 (en)
WO (1) WO1988001152A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350925A1 (en) * 1988-07-13 1990-01-17 KARL LEIBINGER MEDIZINTECHNIK GMBH & CO. External clamping device for a bone fracture
EP0524441A1 (en) * 1991-07-23 1993-01-27 Synthes AG, Chur Clamping joint for connecting two construction elements, in particular for an osteosynthetic fixator
FR2693648A1 (en) * 1992-07-20 1994-01-21 Cledec Component-securing mechanism for bone-setting pin assembly - has pins supported by shafts, with connecting components defined by pairs of grooved retainers locked axially together
FR2697994A1 (en) * 1992-11-19 1994-05-20 Aghion Michael Articulated surgical fixing for setting bone fragments - has two articulated arms which can be adjusted relative to one another by gear and worm screw mechanisms
US5498264A (en) * 1992-07-21 1996-03-12 Synthes (U.S.A.) Clamp connection for connecting two construction components for a setting device, particularly an osteosynthetic setting device
EP0700664A1 (en) 1994-09-06 1996-03-13 Jaquet Orthopedie S.A. Articulation for components of an external fixator
GB2304795A (en) * 1995-07-22 1997-03-26 Neil Blair Clamp and method
WO2000018310A1 (en) * 1998-09-29 2000-04-06 Synthes Ag Chur Device for joining a longitudinal support and bone fixation means
US6342054B1 (en) 1998-12-29 2002-01-29 Stryker Trauma Sa Positioning and locking device
EP1184000A1 (en) * 2000-08-31 2002-03-06 ORTHOFIX S.r.l. External fixator for stabilizing bone fractures
US6610063B2 (en) 2000-07-28 2003-08-26 Synthes (Usa) Spinal fixation system
US6793655B2 (en) 1994-12-05 2004-09-21 Smith & Nephew, Inc. External fixator for distal radius fractures
WO2007001945A1 (en) * 2005-06-21 2007-01-04 Synthes (U.S.A.) Adjustable fixation clamp and method
WO2015040291A1 (en) 2013-09-19 2015-03-26 Assut Europe External fixator for osteosynthesis of the shoulder
US9770272B2 (en) 2012-12-12 2017-09-26 Wright Medical Technology, Inc. Orthopedic compression/distraction device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096110A (en) * 1963-01-07 1963-07-02 Manostat Corp Clamp
CH579438A5 (en) * 1974-05-22 1976-09-15 Jaquet Henri
FR2517535A1 (en) * 1981-12-09 1983-06-10 Zbikowski Juan FUNCTIONAL IMMOBILIZATION DEVICE FOR OSTEO-SYNTHESIS USING EXTERNAL FIXATORS
FR2557933A1 (en) * 1984-01-10 1985-07-12 Srebot Articulation device for assembling several elements, especially for an external fixture intended for osteosynthesis.
US4620533A (en) * 1985-09-16 1986-11-04 Pfizer Hospital Products Group Inc. External bone fixation apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096110A (en) * 1963-01-07 1963-07-02 Manostat Corp Clamp
CH579438A5 (en) * 1974-05-22 1976-09-15 Jaquet Henri
FR2517535A1 (en) * 1981-12-09 1983-06-10 Zbikowski Juan FUNCTIONAL IMMOBILIZATION DEVICE FOR OSTEO-SYNTHESIS USING EXTERNAL FIXATORS
FR2557933A1 (en) * 1984-01-10 1985-07-12 Srebot Articulation device for assembling several elements, especially for an external fixture intended for osteosynthesis.
US4620533A (en) * 1985-09-16 1986-11-04 Pfizer Hospital Products Group Inc. External bone fixation apparatus

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350925A1 (en) * 1988-07-13 1990-01-17 KARL LEIBINGER MEDIZINTECHNIK GMBH & CO. External clamping device for a bone fracture
CH686902A5 (en) * 1991-07-23 1996-07-31 Synthes Ag clamp connection
EP0524441A1 (en) * 1991-07-23 1993-01-27 Synthes AG, Chur Clamping joint for connecting two construction elements, in particular for an osteosynthetic fixator
FR2693648A1 (en) * 1992-07-20 1994-01-21 Cledec Component-securing mechanism for bone-setting pin assembly - has pins supported by shafts, with connecting components defined by pairs of grooved retainers locked axially together
US5498264A (en) * 1992-07-21 1996-03-12 Synthes (U.S.A.) Clamp connection for connecting two construction components for a setting device, particularly an osteosynthetic setting device
FR2697994A1 (en) * 1992-11-19 1994-05-20 Aghion Michael Articulated surgical fixing for setting bone fragments - has two articulated arms which can be adjusted relative to one another by gear and worm screw mechanisms
AU686852B2 (en) * 1994-09-06 1998-02-12 Stryker Trauma S.A. Articulation for components of an external fixator
US5752954A (en) * 1994-09-06 1998-05-19 Howmedica International External fixation device
EP0700664A1 (en) 1994-09-06 1996-03-13 Jaquet Orthopedie S.A. Articulation for components of an external fixator
US6793655B2 (en) 1994-12-05 2004-09-21 Smith & Nephew, Inc. External fixator for distal radius fractures
GB2304795A (en) * 1995-07-22 1997-03-26 Neil Blair Clamp and method
GB2304795B (en) * 1995-07-22 1999-05-12 Neil Blair Securement device and method
WO2000018310A1 (en) * 1998-09-29 2000-04-06 Synthes Ag Chur Device for joining a longitudinal support and bone fixation means
US6582436B2 (en) 1998-09-29 2003-06-24 Synthes (U.S.A.) Device for connecting a longitudinal support to a bone anchor
US6342054B1 (en) 1998-12-29 2002-01-29 Stryker Trauma Sa Positioning and locking device
US8221470B2 (en) 2000-07-28 2012-07-17 Synthes Usa, Llc Spinal fixation system
US9504499B2 (en) 2000-07-28 2016-11-29 DePuy Synthes Products, Inc. Spinal fixation system
US6610063B2 (en) 2000-07-28 2003-08-26 Synthes (Usa) Spinal fixation system
US7118571B2 (en) 2000-07-28 2006-10-10 Synthes (U.S.A.) Spinal fixation system
WO2002017802A1 (en) * 2000-08-31 2002-03-07 Orthofix S.R.L. An external splint device for reducing bone fractures
EP1184000A1 (en) * 2000-08-31 2002-03-06 ORTHOFIX S.r.l. External fixator for stabilizing bone fractures
WO2007001945A1 (en) * 2005-06-21 2007-01-04 Synthes (U.S.A.) Adjustable fixation clamp and method
TWI392473B (en) * 2005-06-21 2013-04-11 Synthes Gmbh Clamp for external fixation
CN101296665B (en) * 2005-06-21 2013-05-29 新特斯有限责任公司 Adjustable fixation clamp
US8523858B2 (en) * 2005-06-21 2013-09-03 DePuy Synthes Products, LLC Adjustable fixation clamp and method
US9545266B2 (en) 2005-06-21 2017-01-17 DePuy Synthes Products, Inc. Adjustable fixation clamp and method
US9770272B2 (en) 2012-12-12 2017-09-26 Wright Medical Technology, Inc. Orthopedic compression/distraction device
US10631900B2 (en) 2012-12-12 2020-04-28 Wright Medical Technology, Inc. Orthopedic compression/distraction device
WO2015040291A1 (en) 2013-09-19 2015-03-26 Assut Europe External fixator for osteosynthesis of the shoulder

Also Published As

Publication number Publication date
GB8903493D0 (en) 1989-05-04
DK216788D0 (en) 1988-04-21
GB2213733A (en) 1989-08-23
AU7806787A (en) 1988-03-08
EP0321472A1 (en) 1989-06-28
GB8620504D0 (en) 1986-10-01
DK216788A (en) 1988-04-21

Similar Documents

Publication Publication Date Title
WO1988001152A1 (en) A clamping device
US5223667A (en) Plural piece flechettes affording enhanced penetration
US4641640A (en) Compression screw assembly
EP0085493B1 (en) Compression screw assembly
US6340361B1 (en) External fixator clamp and system
US4757809A (en) Pin clamp
US4617922A (en) Compression screw assembly
US5564852A (en) Adjustable hot stick adaptor
US8677516B2 (en) Helmet bracket
GB2280608A (en) External bone fixator
EP2328484B1 (en) Catheter nail targeting guide
CA2038100A1 (en) Frangible nonlethal projectile
BR112012024450B1 (en) CAPTURED PANEL FIXER
US3029811A (en) Surgical hip nail
ES506852A0 (en) A COUNTER-MATERIAL PROJECTILE, WITHOUT EXPLOSIVE.
JPH10151144A (en) Driving appliance for nail or the like
EP1813216B1 (en) Screw for performing syndesis of a fracture
US6063122A (en) Jack screw adapter for joint prosthesis
EP2641679A2 (en) Interface between two system modules of a tool system
CA2121085A1 (en) Disposable external fixator
KR100861848B1 (en) Holder for placing a device such as a telescopic sight on a weapon
CN105358079A (en) Tool devices for securing connector elements
CN214180553U (en) Broach distal end lock nail sight
AU599015B2 (en) Improved bone fixation system
WO2020116872A1 (en) Reverse compression bone screw

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU DK GB JP SU 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: 1987905255

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1987905255

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1987905255

Country of ref document: EP