WO1997027812A1 - Screw for insertion into a bone and tool for removing this screw - Google Patents

Screw for insertion into a bone and tool for removing this screw Download PDF

Info

Publication number
WO1997027812A1
WO1997027812A1 PCT/DE1997/000195 DE9700195W WO9727812A1 WO 1997027812 A1 WO1997027812 A1 WO 1997027812A1 DE 9700195 W DE9700195 W DE 9700195W WO 9727812 A1 WO9727812 A1 WO 9727812A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
head
screw body
bone
tool
Prior art date
Application number
PCT/DE1997/000195
Other languages
German (de)
French (fr)
Inventor
Axel Kirsch
Walter Dürr
Original Assignee
Axel Kirsch
Duerr Walter
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 Axel Kirsch, Duerr Walter filed Critical Axel Kirsch
Priority to JP09527246A priority Critical patent/JP2000514669A/en
Priority to AU21507/97A priority patent/AU2150797A/en
Priority to EP97914109A priority patent/EP0959794A1/en
Priority to BR9707322A priority patent/BR9707322A/en
Publication of WO1997027812A1 publication Critical patent/WO1997027812A1/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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • 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
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875—Screwdrivers, spanners or wrenches
    • A61B17/8877—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit
    • 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
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • 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
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter

Definitions

  • Screw for insertion into a bone and unscrewing tool therefor
  • the invention relates to a screw for insertion into a bone, in particular for fastening plates that support the fixing of bone parts, with a screw body that has a threaded section and an indirectly or directly adjoining head, on which a device for screwing the screw body into the bones is provided.
  • the invention further relates to a boring tool for such a screw or its screw body.
  • Bone screws are very small, with a head size that is usually less than 5 mm
  • a flat slot or a cross slot for screwing the screw into the bone.
  • Such screws are mainly used to fasten plates that support the fixation of bone parts.
  • the very flat design means that the slot or the cross slot for screwing in or out the screw can only be very flat. Not only does this mean that the tool for manipulating the screw is very difficult to apply, there is also a risk that the blade of the tool will slip and cause damage.
  • the screw according to the invention is characterized in that the device for screwing in the screw body is a shaft formed in one piece with the head, at least one predetermined breaking point being formed in the connection area between the head and the shaft. Screw body and insertion tool are thus initially available as one unit. This unit can be screwed into the bone using a suitable rotary drive with low speeds. After the screw-in depth has been reached, the torque acting on the predetermined breaking point increases so much that the screw body breaks off the shaft and is thus placed in the bone.
  • the at least one predetermined breaking point therefore advantageously defines a surface which is dimensioned in accordance with a desired maximum tightening torque of the screw.
  • the size of such an area can be determined by experiments, possibly also depending on the choice of material.
  • the screw body has a web on the head to which the shaft is connected.
  • the predetermined breaking point is located on the side of the web facing the shaft.
  • Such a web which is expediently designed as a central web, can be produced by immersing a milling cutter on two sides, offset from the central axis of the screw body, which leaves the desired web straight.
  • the unscrewing tool for such a screw or its screw body is then characterized in that a slot is provided at a free end of the unscrewing tool body, which slot is dimensioned such that it engages the head of the screw body via a coupling section, for example the web.
  • the boring tool has a shape in the area of the slot in such a way that lugs defining the slot lie snugly in notches which are formed on both sides of the web in the head of the screw body.
  • Figure 1 is a side view of a screw for insertion into a bone according to an embodiment of the present invention
  • FIG. 2 shows a sectional view through the screw in the area of her head
  • Figure 3 is a plan view of the head, with the shaft broken away;
  • Figure 4 is a side view, partially in longitudinal section, of the boring tool for a screw or its screw body according to the invention.
  • FIG. 5 shows a side view of the boring tool rotated by 90 ° in relation to FIG. 4, again partially cut away.
  • FIG. 1 shows a side view of a screw according to the invention for insertion into a bone.
  • the screw consists of a screw body 10 and a screw-in tool 20, which are integrally formed with one another, a predetermined breaking point 28 being defined in the connection area between screw body 10 and screw-in tool 20.
  • the screw body 10 consists in the usual way of a threaded section 12 and a head 14 directly or indirectly adjoining it.
  • the screwing tool 20 is formed from an elongated shaft 22 which extends in the direction of the head 14 of the screw body 10 over a certain section 24 rejuvenated. At the end of shaft 22 opposite section 24, a coupling part 26 is provided for an angle piece or the like.
  • Figure 2 shows a longitudinal sectional view of the head 14 of the screw body 10.
  • the central axis and notches 18 set apart from this, for example by means of a corresponding milling tool, so that a web 16 remains within the head 14, on its exposed surface, as can be seen directly in FIG. 3, the predetermined breaking point 28 is provided.
  • the predetermined breaking point is shown in FIG. 3 as a circular surface, but other surface shapes and thus surface sizes are also possible, so that the desired maximum tightening torque for the screw in the bone can be determined via the dimension of this surface.
  • the screwing tool 20 breaks off at the tapered section 24 or at the predetermined breaking point 28 from the web 16 of the screw body 10 .
  • an unscrewing tool is expediently used, as is shown in partial side views in FIGS. 4 and 5. It is essential for the boring tool 30 that a slot 34 is formed at the free end of the boring tool body 32, which can be seen particularly well in the partially cut-away area of FIG. 5, the slot 34 being dimensioned such that it overlaps engages the web 16 in the head 14 of the screw body 10. To a fuller. To ensure the fit of the boring tool 30 in the head 14, lugs 36 are formed on both sides of the slot so that they lie essentially in a positive manner in the notches 18 in the head 14 of the screw body 10.
  • the unscrewing tool 30, like the screwing-in tool 20, can be provided with a coupling part for an angle piece.

Abstract

The invention concerns a screw for insertion into a bone, in particular for securing plates which help to fix bone parts. The screw has a body comprising a threaded section and a head which adjoins the latter directly or indirectly and on which a device for screwing the screw body into the bone is provided. The screw is characterized in that the device for screwing in the screw body is a shank which is integral with the head, at least one predetermined breaking point being formed in the connection region between the head and shank. The invention further concerns a tool for removing this screw or its screw body.

Description

Schraube zum Einsetzen in einen Knochen sowie Ausdrehwerkzeug dafür Screw for insertion into a bone and unscrewing tool therefor
Die Erfindung betrifft eine Schraube zum Einsetzen in einen Knochen, insbesondere zur Befestigung von Platten, welche das Fixieren von Knochenteilen unterstützen, mit einem Schraubenkδrper, der einen Gewindeabschnitt und einen indirekt oder direkt daran anschließenden Kopf aufweist, an dem eine Einrichtung zum Eindrehen des Schraubenkörpers in den Knochen vorgesehen ist. Die Erfindung betrifft weiterhin ein Ausdrehwerkzeug für eine solche Schraube bzw. deren Schraubenkörper.The invention relates to a screw for insertion into a bone, in particular for fastening plates that support the fixing of bone parts, with a screw body that has a threaded section and an indirectly or directly adjoining head, on which a device for screwing the screw body into the bones is provided. The invention further relates to a boring tool for such a screw or its screw body.
Knochenschrauben in sehr kleiner Ausführung, mit einer Kopfgroße, die in der Regel unter 5 mm liegt, sind Bone screws are very small, with a head size that is usually less than 5 mm
üblicherweise auf der Kopfoberseite mit einem flachen Schlitz oder einem Kreuzschlitz zum Eindrehen der Schraube in den Knochen versehen. Solche Schrauben dienen hauptsäch¬ lich zur Befestigung von Platten, welche das Fixieren von Knochenteilen unterstützen. Die sehr flache Bauweise bedingt, daß auch der Schlitz bzw. der Kreuzschlitz zum Ein- oder Ausdrehen der Schraube nur sehr flach sein kann. Dies bedeutet nicht nur, daß das Werkzeug zur Manipulation der Schraube nur sehr schwierig anzusetzen ist, es besteht auch die Gefahr, daß die Klinge des Werkzeuges abrutscht und Schäden hervorruft.Usually provided on the top of the head with a flat slot or a cross slot for screwing the screw into the bone. Such screws are mainly used to fasten plates that support the fixation of bone parts. The very flat design means that the slot or the cross slot for screwing in or out the screw can only be very flat. Not only does this mean that the tool for manipulating the screw is very difficult to apply, there is also a risk that the blade of the tool will slip and cause damage.
Es ist daher die Aufgabe der Erfindung, eine Schraube zur Verfügung zu stellen, die sicher und risikolos in den Knochen einzusetzen ist.It is therefore the object of the invention to provide a screw which can be inserted into the bone safely and without risk.
Diese Aufgabe wird durch eine Schraube nach Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.This object is achieved by a screw according to claim 1. Advantageous refinements are the subject of the dependent claims.
Die Schraube gemäß der Erfindung ist dadurch gekennzeichnet, daß die Einrichtung zum Eindrehen des Schraubenkörpers ein einstückig mit dem Kopf ausgebildeter Schaft ist, wobei in dem Anschlußbereich zwischen Kopf und Schaft zumindest eine Sollbruchstelle gebildet ist. Schraubenkδrper und Eindreh¬ werkzeug liegen damit zunächst als eine Einheit vor. Diese Einheit kann durch einen geeigneten Drehantrieb mit geringen Umdrehungszahlen in den Knochen eingeschraubt werden. Nachdem die Einschraubtiefe erreicht ist, wächst das auf die Sollbruchstelle wirkende Drehmoment so stark an, daß der Schraubenkörper vom Schaft abbricht und somit im Knochen plaziert ist.The screw according to the invention is characterized in that the device for screwing in the screw body is a shaft formed in one piece with the head, at least one predetermined breaking point being formed in the connection area between the head and the shaft. Screw body and insertion tool are thus initially available as one unit. This unit can be screwed into the bone using a suitable rotary drive with low speeds. After the screw-in depth has been reached, the torque acting on the predetermined breaking point increases so much that the screw body breaks off the shaft and is thus placed in the bone.
Vorteilhaft definiert daher die mindestens eine Sollbruch¬ stelle eine Fläche, die entsprechend einem gewünschten maximalen Anzugsdrehmoment der Schraube bemessen ist. Das Maß für eine solche Fläche kann, gegebenenfalls auch abhängig von der Materialwahl, durch Versuche bestimmt werden.The at least one predetermined breaking point therefore advantageously defines a surface which is dimensioned in accordance with a desired maximum tightening torque of the screw. The The size of such an area can be determined by experiments, possibly also depending on the choice of material.
Nach einer besonders bevorzugten Ausführungsform weist der Schraubenkörper am Kopf einen Steg auf, an den der Schaft angeschlossen ist. Die Sollbruchstelle befindet sich dabei auf der dem Schaft zugewandten Seite des Steges. Ein solcher Steg, der zweckmäßigerweise als Mittelsteg ausgebildet ist, kann dadurch hergestellt werden, daß versetzt zur Mittel¬ achse des Schraubenkörpers zweiseitig eine Fräse eingetaucht wird, die geraden den gewünschten Steg stehenläßt.According to a particularly preferred embodiment, the screw body has a web on the head to which the shaft is connected. The predetermined breaking point is located on the side of the web facing the shaft. Such a web, which is expediently designed as a central web, can be produced by immersing a milling cutter on two sides, offset from the central axis of the screw body, which leaves the desired web straight.
Für die meisten Anwendungsfälle wird es erforderlich sein, nach einer gewissen Zeit den Schraubenkörper wieder aus dem Knochen herauszudrehen. Dabei bildet der an dem Kopf des Schraubenkörpers ausgebildete Steg eine Ansatzmöglichkeit für ein Ausdrehwerkzeug.For most applications, it will be necessary to unscrew the screw body from the bone after a certain time. The web formed on the head of the screw body forms a starting point for a boring tool.
Das Ausdrehwerkzeug für eine solche Schraube bzw. deren Schraubenkόrper ist dann dadurch gekennzeichnet, daß an einem freien Ende des Ausdrehwerkzeugkörpers ein Schlitz vorgesehen ist, der so bemessen ist, daß er über einen Kopplungsabschnitt, beispielsweise den Steg, am Kopf des Schraubenkδrpers greift.The unscrewing tool for such a screw or its screw body is then characterized in that a slot is provided at a free end of the unscrewing tool body, which slot is dimensioned such that it engages the head of the screw body via a coupling section, for example the web.
Weiter bevorzugt weist das Ausdrehwerkzeug im Bereich des Schlitzes eine Formgebung derart auf, daß den Schlitz definierende Ansätze satt in Kerben liegen, die auf beiden Seiten des Steges im Kopf des Schraubenkörpers ausgebildet sind.More preferably, the boring tool has a shape in the area of the slot in such a way that lugs defining the slot lie snugly in notches which are formed on both sides of the web in the head of the screw body.
Im folgenden soll die Erfindung lediglich beispielhaft anhand der beigefügten Zeichnung erläutert werden. Es zeigt:In the following, the invention will be explained only by way of example with reference to the accompanying drawing. It shows:
Figur 1 eine Seitensicht auf eine Schraube zum Einsetzen in einen Knochen gemäß einer Ausführungsform der vorliegenden Erfindung,-Figure 1 is a side view of a screw for insertion into a bone according to an embodiment of the present invention,
Figur 2 eine Schnittansicht durch die Schraube im Bereich ihres Kopfes,*FIG. 2 shows a sectional view through the screw in the area of her head, *
Figur 3 eine Draufsicht auf den Kopf, bei weggebrochenem Schaft;Figure 3 is a plan view of the head, with the shaft broken away;
Figur 4 eine Seitenansicht, teilweise im Längsschnitt, des Ausdrehwerkzeuges für eine Schraube bzw. deren Schraubenkörper nach der Erfindung; undFigure 4 is a side view, partially in longitudinal section, of the boring tool for a screw or its screw body according to the invention; and
Figur 5 eine gegenüber der Figur 4 um 90° verdrehte Seitenansicht des Ausdrehwerkzeuges, wieder teilweise weggeschnitten.5 shows a side view of the boring tool rotated by 90 ° in relation to FIG. 4, again partially cut away.
Figur 1 zeigt eine Seitenansicht einer erfindungsgemäßen Schraube zum Einsetzen in einen Knochen. Die Schraube besteht aus einem Schraubenkörper 10 und einem Eindreh¬ werkzeug 20, die einstückig miteinander ausgebildet sind, wobei im Anschlußbereich zwischen Schraubenkörper 10 und Eindrehwerkzeug 20 eine Sollbruchstelle 28 definiert ist. Der Schraubenkδrper 10 besteht dabei in üblicher Weise aus einem Gewindeabschnitt 12 und einem sich daran direkt oder indirekt anschließenden Kopf 14. Das Eindrehwerkzeug 20 ist aus einem langgestreckten Schaft 22 gebildet, der sich in Richtung auf den Kopf 14 des Schraubenkörpers 10 über einen bestimmten Abschnitt 24 verjüngt. An dem dem Abschnitt 24 gegenüberliegenden Ende des Schaftes 22 ist ein Kopplungs¬ teil 26 für ein Winkelstück oder dergleichen vorgesehen.Figure 1 shows a side view of a screw according to the invention for insertion into a bone. The screw consists of a screw body 10 and a screw-in tool 20, which are integrally formed with one another, a predetermined breaking point 28 being defined in the connection area between screw body 10 and screw-in tool 20. The screw body 10 consists in the usual way of a threaded section 12 and a head 14 directly or indirectly adjoining it. The screwing tool 20 is formed from an elongated shaft 22 which extends in the direction of the head 14 of the screw body 10 over a certain section 24 rejuvenated. At the end of shaft 22 opposite section 24, a coupling part 26 is provided for an angle piece or the like.
Die Konfiguration im Anschlußbereich soll genauer mit weiterem Bezug auf die Figuren 2 und 3 erläutert werden. Figur 2 zeigt eine Längsschnittansicht des Kopfes 14 des Schraubenkorpers 10. In den Kopf 14 sind beidseits der Mittelachse und von dieser abgesetzt Kerben 18 eingear¬ beitet, beispielsweise mittels eines entsprechenden Fräs¬ werkzeuges, so daß innerhalb des Kopfes 14 ein Steg 16 stehenbleibt, auf dessen freiliegender Oberfläche, wie sich der Figur 3 unmittelbar entnehmen läßt, die Sollbruchstelle 28 vorgesehen ist. In Figur 3 ist die Sollbruchstelle als Kreisfläche dargestellt, jedoch sind auch andere Flächenfor¬ men und damit Flächengrδßen möglich, so daß über das Maß dieser Fläche das gewünschte maximale Anzugsdrehmoment für die Schraube in den Knochen festgelegt werden kann.The configuration in the connection area will be explained in more detail with further reference to FIGS. 2 and 3. Figure 2 shows a longitudinal sectional view of the head 14 of the screw body 10. In the head 14 are on both sides of the The central axis and notches 18 set apart from this, for example by means of a corresponding milling tool, so that a web 16 remains within the head 14, on its exposed surface, as can be seen directly in FIG. 3, the predetermined breaking point 28 is provided. The predetermined breaking point is shown in FIG. 3 as a circular surface, but other surface shapes and thus surface sizes are also possible, so that the desired maximum tightening torque for the screw in the bone can be determined via the dimension of this surface.
Der gemeinsamen Betrachtung der Figuren 1 und 3 entnimmt man, daß der sich verjüngende Abschnitt 24 des Schaftes 22 gerade auf dieser Sollbruchstelle 28 auf dem Steg 16 des Kopfes 14 des Schraubenkörpers 10 festgelegt ist.1 and 3, it can be seen that the tapering section 24 of the shaft 22 is fixed precisely on this predetermined breaking point 28 on the web 16 of the head 14 of the screw body 10.
Nachdem der Gewindeabschnitt 12 des Schraubenkörpers 10 so weit in den Knochen eingedreht ist, daß das durch die Sollbruchstelle 28 definierte Anzugsdrehmoment überschritten wird, bricht das Eindrehwerkzeug 20 an dem sich verjüngenden Abschnitt 24 bzw. an der Sollbruchstelle 28 von dem Steg 16 des Schraubenkorpers 10 ab.After the threaded section 12 of the screw body 10 is screwed into the bone so far that the tightening torque defined by the predetermined breaking point 28 is exceeded, the screwing tool 20 breaks off at the tapered section 24 or at the predetermined breaking point 28 from the web 16 of the screw body 10 .
Wenn nun später der Schraubenkörper 10 aus dem Knochen entfernt werden soll, wird zweckmäßigerweise ein Ausdreh¬ werkzeug verwendet, wie es in den Figuren 4 und 5 in Teil- Seitenansichten dargestellt ist. Wesentlich für das Ausdreh¬ werkzeug 30 ist, daß am freien Ende des Ausdrehkwerkzeugkör- pers 32 ein Schlitz 34 ausgebildet ist, der besonders gut in dem teilweise weggeschnittenen Bereich der Figur 5 zu erkennen ist, wobei der Schlitz 34 so bemessen ist, daß er über den Steg 16 im Kopf 14 des Schraubenkörpers 10 greift. Um einen satter. Sitz des Ausdrehkwerkzeuges 30 in dem Kopf 14 zu gewährleisten, sind beidseits des Schlitzes Ansätze 36 so ausgebildet, daß sie im wesentlichen formschlüssig in die Kerben 18 im Kopf 14 des Schraubenkorpers 10 liegen. Das Ausdrehwerkzeug 30 kann, ähnlich wie das Eindrehwerkzeug 20, mit einem Kopplungsteil für ein Winkelstück versehen sein.If the screw body 10 is later to be removed from the bone, an unscrewing tool is expediently used, as is shown in partial side views in FIGS. 4 and 5. It is essential for the boring tool 30 that a slot 34 is formed at the free end of the boring tool body 32, which can be seen particularly well in the partially cut-away area of FIG. 5, the slot 34 being dimensioned such that it overlaps engages the web 16 in the head 14 of the screw body 10. To a fuller. To ensure the fit of the boring tool 30 in the head 14, lugs 36 are formed on both sides of the slot so that they lie essentially in a positive manner in the notches 18 in the head 14 of the screw body 10. The unscrewing tool 30, like the screwing-in tool 20, can be provided with a coupling part for an angle piece.
Die in der vorstehenden Beschreibung, in der Zeichnung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung wesentlich sein. The features of the invention disclosed in the above description, in the drawing and in the claims can be essential for realizing the invention both individually and in any combination.

Claims

Patentansprüche claims
1. Schraube zum Einsetzen in einen Knochen, insbesondere zur Befestigung von Platten, welche das Fixieren von Knochenteilen unterstützen, mit einem Schrau¬ benkörper, der einen Gewindeabschnitt und einen indirekt oder direkt daran anschliessenden Kopf aufweist, an dem eine Einrichtung zum Eindrehen des Schraubenkorpers in den Knochen vorgesehen ist, dadurch gekennzeichnet, daß die Einrichtung zum Eindrehen des Schraubenkörpers ein einstückig mit dem Kopf (14) ausgebildeter Schaft (22, 24) ist, wobei in dem 1. Screw for insertion into a bone, in particular for fastening plates that support the fixing of bone parts, with a screw body that has a threaded section and an indirectly or directly adjoining head on which a device for screwing the screw body in the bone is provided, characterized in that the device for screwing in the screw body is a shaft (22, 24) formed in one piece with the head (14), wherein in the
Anschlußbereich zwischen Kopf (14) und Schaft (22, 24) zumindest eine Sollbruchstelle (28) gebildet ist.Connection area between head (14) and shaft (22, 24) at least one predetermined breaking point (28) is formed.
2. Schraube nach Anspruch l, dadurch gekennzeich¬ net, daß die mindestens eine Sollbruchstelle (28) eine Fläche definiert, die entsprechend einem gewünschten maximalen Anzugsdrehmoment der Schraubenkorpers (10) bemessen ist.2. Screw according to claim l, characterized gekennzeich¬ net that the at least one predetermined breaking point (28) defines an area which is dimensioned according to a desired maximum tightening torque of the screw body (10).
3. Schraube nach Anspruch l oder 2, dadurch gekennzeichnet, daß der Kopf (14) einen Steg (16) aufweist, an den der Schaft (22, 24) angeschlossen ist.3. Screw according to claim l or 2, characterized in that the head (14) has a web (16) to which the shaft (22, 24) is connected.
4. Ausdrehwerkzeug für eine Schraube nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß an einem freien Ende des Ausdrehwerkzeugkörpers (32) ein Schlitz (34) vorgesehen ist, der so bemessen ist, daß er über einen Kopp¬ lungsabschnitt (16) am Kopf (14) des Schraubenkörpers (10) greift.4. boring tool for a screw according to one of claims 1 to 3, characterized in that a slot (34) is provided at a free end of the boring tool body (32), which is dimensioned such that it via a coupling section (16) grips the head (14) of the screw body (10).
5. Ausdrehwerkzeug nach Anspruch 4, dadurch gekennzeichnet, daß der Kopplungsabschnitt durch den Steg (16) gebildet ist.5. boring tool according to claim 4, characterized in that the coupling section is formed by the web (16).
6. Ausdrehwerkzeug nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß es im Bereich des Schlitzes6. boring tool according to one of claims 4 or 5, characterized in that it is in the region of the slot
(34) eine Formgebung derart aufweist, daß den Schlitz (34) definierende Ansätze (36) satt in Kerben (18) liegen, die auf beiden Seiten des Steges (16) im Kopf (14) des Schrau¬ benkörpers (10) ausgebildet sind. (34) has a shape such that the lugs (34) defining lugs (36) lie snugly in notches (18) which are formed on both sides of the web (16) in the head (14) of the screw body (10) .
PCT/DE1997/000195 1996-01-31 1997-01-28 Screw for insertion into a bone and tool for removing this screw WO1997027812A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP09527246A JP2000514669A (en) 1996-01-31 1997-01-28 Bone insertion screw and its tightening tool
AU21507/97A AU2150797A (en) 1996-01-31 1997-01-28 Screw for insertion into a bone and tool for removing this screw
EP97914109A EP0959794A1 (en) 1996-01-31 1997-01-28 Screw for insertion into a bone and tool for removing this screw
BR9707322A BR9707322A (en) 1996-01-31 1997-01-28 Screw for use on a bone and unscrewing tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19603410.8 1996-01-31
DE19603410A DE19603410C2 (en) 1996-01-31 1996-01-31 Screw for insertion into a bone and unscrewing tool therefor

Publications (1)

Publication Number Publication Date
WO1997027812A1 true WO1997027812A1 (en) 1997-08-07

Family

ID=7784125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/000195 WO1997027812A1 (en) 1996-01-31 1997-01-28 Screw for insertion into a bone and tool for removing this screw

Country Status (8)

Country Link
EP (1) EP0959794A1 (en)
JP (1) JP2000514669A (en)
CN (1) CN1210456A (en)
AU (1) AU2150797A (en)
BR (1) BR9707322A (en)
CA (1) CA2244217A1 (en)
DE (1) DE19603410C2 (en)
WO (1) WO1997027812A1 (en)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2781998A1 (en) * 1998-08-07 2000-02-11 Hassan Razian Implantable prosthesis for bone, has frangible connection between handling and implant sections of implant rod
DE202014006372U1 (en) 2014-08-05 2014-08-22 Medartis Ag Screw with insertion post
US8845649B2 (en) 2004-09-24 2014-09-30 Roger P. Jackson Spinal fixation tool set and method for rod reduction and fastener insertion
US8852239B2 (en) 2013-02-15 2014-10-07 Roger P Jackson Sagittal angle screw with integral shank and receiver
US8870928B2 (en) 2002-09-06 2014-10-28 Roger P. Jackson Helical guide and advancement flange with radially loaded lip
US8894657B2 (en) 2004-02-27 2014-11-25 Roger P. Jackson Tool system for dynamic spinal implants
US8911478B2 (en) 2012-11-21 2014-12-16 Roger P. Jackson Splay control closure for open bone anchor
US8926672B2 (en) 2004-11-10 2015-01-06 Roger P. Jackson Splay control closure for open bone anchor
US8926670B2 (en) 2003-06-18 2015-01-06 Roger P. Jackson Polyaxial bone screw assembly
US8998960B2 (en) 2004-11-10 2015-04-07 Roger P. Jackson Polyaxial bone screw with helically wound capture connection
US8998959B2 (en) 2009-06-15 2015-04-07 Roger P Jackson Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert
US9050148B2 (en) 2004-02-27 2015-06-09 Roger P. Jackson Spinal fixation tool attachment structure
US9050139B2 (en) 2004-02-27 2015-06-09 Roger P. Jackson Orthopedic implant rod reduction tool set and method
US9055978B2 (en) 2004-02-27 2015-06-16 Roger P. Jackson Orthopedic implant rod reduction tool set and method
US9144444B2 (en) 2003-06-18 2015-09-29 Roger P Jackson Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
US9168069B2 (en) 2009-06-15 2015-10-27 Roger P. Jackson Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US9211150B2 (en) 2004-11-23 2015-12-15 Roger P. Jackson Spinal fixation tool set and method
US9216039B2 (en) 2004-02-27 2015-12-22 Roger P. Jackson Dynamic spinal stabilization assemblies, tool set and method
US9308027B2 (en) 2005-05-27 2016-04-12 Roger P Jackson Polyaxial bone screw with shank articulation pressure insert and method
US9393047B2 (en) 2009-06-15 2016-07-19 Roger P. Jackson Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US9451993B2 (en) 2014-01-09 2016-09-27 Roger P. Jackson Bi-radial pop-on cervical bone anchor
US9504496B2 (en) 2009-06-15 2016-11-29 Roger P. Jackson Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US9566092B2 (en) 2013-10-29 2017-02-14 Roger P. Jackson Cervical bone anchor with collet retainer and outer locking sleeve
US9597119B2 (en) 2014-06-04 2017-03-21 Roger P. Jackson Polyaxial bone anchor with polymer sleeve
US9636146B2 (en) 2012-01-10 2017-05-02 Roger P. Jackson Multi-start closures for open implants
US9662143B2 (en) 2004-02-27 2017-05-30 Roger P Jackson Dynamic fixation assemblies with inner core and outer coil-like member
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure
US9907574B2 (en) 2008-08-01 2018-03-06 Roger P. Jackson Polyaxial bone anchors with pop-on shank, friction fit fully restrained retainer, insert and tool receiving features
US9918745B2 (en) 2009-06-15 2018-03-20 Roger P. Jackson Polyaxial bone anchor with pop-on shank and winged insert with friction fit compressive collet
US10039578B2 (en) 2003-12-16 2018-08-07 DePuy Synthes Products, Inc. Methods and devices for minimally invasive spinal fixation element placement
US10039577B2 (en) 2004-11-23 2018-08-07 Roger P Jackson Bone anchor receiver with horizontal radiused tool attachment structures and parallel planar outer surfaces
US10058354B2 (en) 2013-01-28 2018-08-28 Roger P. Jackson Pivotal bone anchor assembly with frictional shank head seating surfaces
US10064658B2 (en) 2014-06-04 2018-09-04 Roger P. Jackson Polyaxial bone anchor with insert guides
US10299839B2 (en) 2003-12-16 2019-05-28 Medos International Sárl Percutaneous access devices and bone anchor assemblies
US10349983B2 (en) 2003-05-22 2019-07-16 Alphatec Spine, Inc. Pivotal bone anchor assembly with biased bushing for pre-lock friction fit
US11229457B2 (en) 2009-06-15 2022-01-25 Roger P. Jackson Pivotal bone anchor assembly with insert tool deployment
US11234745B2 (en) 2005-07-14 2022-02-01 Roger P. Jackson Polyaxial bone screw assembly with partially spherical screw head and twist in place pressure insert
US11241261B2 (en) 2005-09-30 2022-02-08 Roger P Jackson Apparatus and method for soft spinal stabilization using a tensionable cord and releasable end structure
US11419642B2 (en) 2003-12-16 2022-08-23 Medos International Sarl Percutaneous access devices and bone anchor assemblies

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100391413C (en) * 2005-03-19 2008-06-04 戴维享 Location-guiding apparatus for arranging internal guide meedle in femur neck
DE102010016812A1 (en) * 2009-06-08 2011-03-17 Z.-Medical Gmbh & Co. Kg bone screw
CN101732086B (en) * 2009-11-14 2011-06-15 常州鼎健医疗器械有限公司 Pedicle nail with shape correcting function
US8875368B2 (en) 2012-08-03 2014-11-04 Tyco Electronics Corporation Controlled torque fasteners and methods for using same
DE202013105409U1 (en) 2013-11-27 2013-12-04 Kreidler Medizintechnik Gmbh Screw in particular bone screw and a tool for this
DE102013113135A1 (en) 2013-11-27 2015-05-28 Kreidler Medizintechnik Gmbh Screw in particular bone screw and a tool for this

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954633A (en) * 1950-01-04
US4149434A (en) * 1978-03-17 1979-04-17 Leroy Wilson Screw and screwdriver therefor
EP0276153A2 (en) * 1987-01-22 1988-07-27 Ethicon, Inc. Bone screw
EP0323429A1 (en) * 1987-12-30 1989-07-05 Alain Guinounet Bone plate locking screw and its fabrication process
DE4131110A1 (en) * 1991-09-12 1993-03-18 Benno Heinzel Short-threaded screw fastener for wood and composite material - has threaded lower end of shaft with double grip profile in head for securing tool
FR2721819A1 (en) * 1994-07-04 1996-01-05 Amp Dev Self=drilling and self=tapping osteosynthesis screw

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538593A1 (en) * 1985-10-30 1987-05-07 Thomas Dr Med Jungeblod Device for the surgical treatment of bones, especially of fractured bones
DE3630863A1 (en) * 1986-09-08 1988-03-17 Mecron Med Prod Gmbh Bone screw
DE3804749A1 (en) * 1987-08-31 1989-03-16 Leibinger Oswald Gmbh Screwdriver with screw holder, in particular for bone screws
DE4012506A1 (en) * 1990-04-12 1991-10-17 Mecron Med Prod Gmbh BONE SCREW

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954633A (en) * 1950-01-04
US4149434A (en) * 1978-03-17 1979-04-17 Leroy Wilson Screw and screwdriver therefor
EP0276153A2 (en) * 1987-01-22 1988-07-27 Ethicon, Inc. Bone screw
EP0323429A1 (en) * 1987-12-30 1989-07-05 Alain Guinounet Bone plate locking screw and its fabrication process
DE4131110A1 (en) * 1991-09-12 1993-03-18 Benno Heinzel Short-threaded screw fastener for wood and composite material - has threaded lower end of shaft with double grip profile in head for securing tool
FR2721819A1 (en) * 1994-07-04 1996-01-05 Amp Dev Self=drilling and self=tapping osteosynthesis screw

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2781998A1 (en) * 1998-08-07 2000-02-11 Hassan Razian Implantable prosthesis for bone, has frangible connection between handling and implant sections of implant rod
US8870928B2 (en) 2002-09-06 2014-10-28 Roger P. Jackson Helical guide and advancement flange with radially loaded lip
US10349983B2 (en) 2003-05-22 2019-07-16 Alphatec Spine, Inc. Pivotal bone anchor assembly with biased bushing for pre-lock friction fit
US9144444B2 (en) 2003-06-18 2015-09-29 Roger P Jackson Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
USRE46431E1 (en) 2003-06-18 2017-06-13 Roger P Jackson Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
US8926670B2 (en) 2003-06-18 2015-01-06 Roger P. Jackson Polyaxial bone screw assembly
US8936623B2 (en) 2003-06-18 2015-01-20 Roger P. Jackson Polyaxial bone screw assembly
US11426216B2 (en) 2003-12-16 2022-08-30 DePuy Synthes Products, Inc. Methods and devices for minimally invasive spinal fixation element placement
US10039578B2 (en) 2003-12-16 2018-08-07 DePuy Synthes Products, Inc. Methods and devices for minimally invasive spinal fixation element placement
US11419642B2 (en) 2003-12-16 2022-08-23 Medos International Sarl Percutaneous access devices and bone anchor assemblies
US10299839B2 (en) 2003-12-16 2019-05-28 Medos International Sárl Percutaneous access devices and bone anchor assemblies
US9055978B2 (en) 2004-02-27 2015-06-16 Roger P. Jackson Orthopedic implant rod reduction tool set and method
US9216039B2 (en) 2004-02-27 2015-12-22 Roger P. Jackson Dynamic spinal stabilization assemblies, tool set and method
US9050139B2 (en) 2004-02-27 2015-06-09 Roger P. Jackson Orthopedic implant rod reduction tool set and method
US9662143B2 (en) 2004-02-27 2017-05-30 Roger P Jackson Dynamic fixation assemblies with inner core and outer coil-like member
US11291480B2 (en) 2004-02-27 2022-04-05 Nuvasive, Inc. Spinal fixation tool attachment structure
US9050148B2 (en) 2004-02-27 2015-06-09 Roger P. Jackson Spinal fixation tool attachment structure
US11147597B2 (en) 2004-02-27 2021-10-19 Roger P Jackson Dynamic spinal stabilization assemblies, tool set and method
US11648039B2 (en) 2004-02-27 2023-05-16 Roger P. Jackson Spinal fixation tool attachment structure
US10485588B2 (en) 2004-02-27 2019-11-26 Nuvasive, Inc. Spinal fixation tool attachment structure
US9662151B2 (en) 2004-02-27 2017-05-30 Roger P Jackson Orthopedic implant rod reduction tool set and method
US9636151B2 (en) 2004-02-27 2017-05-02 Roger P Jackson Orthopedic implant rod reduction tool set and method
US8894657B2 (en) 2004-02-27 2014-11-25 Roger P. Jackson Tool system for dynamic spinal implants
US9918751B2 (en) 2004-02-27 2018-03-20 Roger P. Jackson Tool system for dynamic spinal implants
US9532815B2 (en) 2004-02-27 2017-01-03 Roger P. Jackson Spinal fixation tool set and method
US8845649B2 (en) 2004-09-24 2014-09-30 Roger P. Jackson Spinal fixation tool set and method for rod reduction and fastener insertion
US11147591B2 (en) 2004-11-10 2021-10-19 Roger P Jackson Pivotal bone anchor receiver assembly with threaded closure
US9743957B2 (en) 2004-11-10 2017-08-29 Roger P. Jackson Polyaxial bone screw with shank articulation pressure insert and method
US8926672B2 (en) 2004-11-10 2015-01-06 Roger P. Jackson Splay control closure for open bone anchor
US8998960B2 (en) 2004-11-10 2015-04-07 Roger P. Jackson Polyaxial bone screw with helically wound capture connection
US9629669B2 (en) 2004-11-23 2017-04-25 Roger P. Jackson Spinal fixation tool set and method
US10039577B2 (en) 2004-11-23 2018-08-07 Roger P Jackson Bone anchor receiver with horizontal radiused tool attachment structures and parallel planar outer surfaces
US11389214B2 (en) 2004-11-23 2022-07-19 Roger P. Jackson Spinal fixation tool set and method
US9211150B2 (en) 2004-11-23 2015-12-15 Roger P. Jackson Spinal fixation tool set and method
US9522021B2 (en) 2004-11-23 2016-12-20 Roger P. Jackson Polyaxial bone anchor with retainer with notch for mono-axial motion
US9308027B2 (en) 2005-05-27 2016-04-12 Roger P Jackson Polyaxial bone screw with shank articulation pressure insert and method
US11234745B2 (en) 2005-07-14 2022-02-01 Roger P. Jackson Polyaxial bone screw assembly with partially spherical screw head and twist in place pressure insert
US11241261B2 (en) 2005-09-30 2022-02-08 Roger P Jackson Apparatus and method for soft spinal stabilization using a tensionable cord and releasable end structure
US9907574B2 (en) 2008-08-01 2018-03-06 Roger P. Jackson Polyaxial bone anchors with pop-on shank, friction fit fully restrained retainer, insert and tool receiving features
US9168069B2 (en) 2009-06-15 2015-10-27 Roger P. Jackson Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US9717534B2 (en) 2009-06-15 2017-08-01 Roger P. Jackson Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US9918745B2 (en) 2009-06-15 2018-03-20 Roger P. Jackson Polyaxial bone anchor with pop-on shank and winged insert with friction fit compressive collet
US9393047B2 (en) 2009-06-15 2016-07-19 Roger P. Jackson Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US8998959B2 (en) 2009-06-15 2015-04-07 Roger P Jackson Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert
US9504496B2 (en) 2009-06-15 2016-11-29 Roger P. Jackson Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US11229457B2 (en) 2009-06-15 2022-01-25 Roger P. Jackson Pivotal bone anchor assembly with insert tool deployment
US9636146B2 (en) 2012-01-10 2017-05-02 Roger P. Jackson Multi-start closures for open implants
US8911478B2 (en) 2012-11-21 2014-12-16 Roger P. Jackson Splay control closure for open bone anchor
US9770265B2 (en) 2012-11-21 2017-09-26 Roger P. Jackson Splay control closure for open bone anchor
US10058354B2 (en) 2013-01-28 2018-08-28 Roger P. Jackson Pivotal bone anchor assembly with frictional shank head seating surfaces
US8852239B2 (en) 2013-02-15 2014-10-07 Roger P Jackson Sagittal angle screw with integral shank and receiver
US9566092B2 (en) 2013-10-29 2017-02-14 Roger P. Jackson Cervical bone anchor with collet retainer and outer locking sleeve
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure
US9451993B2 (en) 2014-01-09 2016-09-27 Roger P. Jackson Bi-radial pop-on cervical bone anchor
US9597119B2 (en) 2014-06-04 2017-03-21 Roger P. Jackson Polyaxial bone anchor with polymer sleeve
US10064658B2 (en) 2014-06-04 2018-09-04 Roger P. Jackson Polyaxial bone anchor with insert guides
US10582959B2 (en) 2014-08-05 2020-03-10 Medartis Holding Ag Screw with insertion post
DE202014006372U1 (en) 2014-08-05 2014-08-22 Medartis Ag Screw with insertion post

Also Published As

Publication number Publication date
AU2150797A (en) 1997-08-22
CN1210456A (en) 1999-03-10
DE19603410A1 (en) 1997-08-14
EP0959794A1 (en) 1999-12-01
CA2244217A1 (en) 1997-08-07
DE19603410C2 (en) 1999-02-18
BR9707322A (en) 1999-04-13
JP2000514669A (en) 2000-11-07

Similar Documents

Publication Publication Date Title
WO1997027812A1 (en) Screw for insertion into a bone and tool for removing this screw
EP0173267B1 (en) Drill guide for inclined screw holes through plates in parts of a bone to be stabilised
EP0487830B1 (en) Implant for correction of the humain spinal column
EP0639955B1 (en) Screw for securing an intramedullary nail
EP1306057B1 (en) Bones fixation device
DE10319781B3 (en) Bone anchor, to attach a component to the bone, has a head to hold the component and a shaft with screw thread sections and thread-free sections along the shaft length
DE69724173T2 (en) Surgical closure for use in fracture fixation
DE69633832T2 (en) ARRANGEMENT OF FUSE-NUT AND BOLTS
DE2718515A1 (en) ORTHOPEDIC FIXING DEVICE
DE69937875T2 (en) Bone screw for external fixators
DE3630863A1 (en) Bone screw
EP0374084A1 (en) Sliding hole plate for osteosynthesis
EP0410309A1 (en) Stabilising element for bones
DD258361A5 (en) PLATE FOR CONNECTING BREAKDOWS OF THE ANCHOR WITH BONE GAMES
DE69815166T2 (en) Separable device for a bone plate or for fixing two bone fragments
DE69833032T2 (en) IMPLANT WITH AN IMPLANT ELEMENT WITH THREAD FOR ANCHORING IN BONE TISSUE
EP0306709A2 (en) Intramedullary anchorage nail
EP1210019B2 (en) Use of a bone screw
DE102005014546B4 (en) Large fragment plate and adapter for a large fragment plate
DE19625416A1 (en) Screwdriver and screw for trauma and corrective facial or jaw surgery
EP1648318B1 (en) Device for fixing a longitudinal carrier to a bone fixing element
EP1364621B1 (en) Device for positioning and fixing bone and/or bone fragments
DE3403654C2 (en)
DE2852024A1 (en) TOOL UNIT
DE2225863A1 (en) TOOTH ANCHORAGE

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 97192003.6

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CZ DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1997914109

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2244217

Country of ref document: CA

Ref document number: 2244217

Country of ref document: CA

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 1997914109

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1997914109

Country of ref document: EP