DE8613638U1 - Bone screw - Google Patents

Bone screw

Info

Publication number
DE8613638U1
DE8613638U1 DE19868613638 DE8613638U DE8613638U1 DE 8613638 U1 DE8613638 U1 DE 8613638U1 DE 19868613638 DE19868613638 DE 19868613638 DE 8613638 U DE8613638 U DE 8613638U DE 8613638 U1 DE8613638 U1 DE 8613638U1
Authority
DE
Germany
Prior art keywords
key
bone screw
pin
screw
head
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.)
Expired
Application number
DE19868613638
Other languages
German (de)
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.)
Waldemar Link GmbH and Co KG
Original Assignee
Waldemar Link GmbH and Co KG
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 Waldemar Link GmbH and Co KG filed Critical Waldemar Link GmbH and Co KG
Priority to DE19868613638 priority Critical patent/DE8613638U1/en
Publication of DE8613638U1 publication Critical patent/DE8613638U1/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/02Spanners; Wrenches with rigid jaws
    • B25B13/06Spanners; Wrenches with rigid jaws of socket type
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8605Heads, i.e. proximal ends projecting from bone
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/88Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875Screwdrivers, spanners or wrenches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00Screwdrivers
    • B25B15/001Screwdrivers characterised by material or shape of the tool bit
    • B25B15/004Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
    • B25B15/008Allen-type keys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0007Specially 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
    • F16B23/0038Specially 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 substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F16B23/0092Specially shaped nuts or heads of bolts or screws for rotations by a tool with a head engageable by two or more different tools
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8605Heads, i.e. proximal ends projecting from bone
    • A61B17/861Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver

Description

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■ ■ iiii ι» in■ ■ iiii ι »in

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D/fiD / fi

Waldemar Link GmbH & Co,
Hamburg
Waldemar Link GmbH & Co,
Hamburg

p 11913/86p 11913/86

Beschreibungdescription

Die Erfindung bezieht sich auf eine Knochenschraube, deren Kopf eine Schlüsselbohrung mit einer von der Kreisform abweichenden Querschnittsform, insbesondere Innensechskant, aufweist. Sie bezieht sich ferner auf einen Schlüssel für eine solche Knochenschraube.The invention relates to a bone screw, the head of which has a key hole with a shape deviating from the circular shape Cross-sectional shape, especially hexagon socket, having. It also relates to a key for such a bone screw.

Knochenschrauben werden herkommlicherweise mit einem linsenförmigen Kopf und Innensechskant hergestellt (DIN 58812 ff.). Beim Lösen einer sehr fest sitzenden Knochenschraube kann es, wenn der Schlüssel verkantet oder nicht genügend tief eingesetzt wird, zu einer Verformung der Schlüsselansatzflächen der Schlüsselbohrung kommen, so daß diese unbrauchbar wird. Für den Spezialfall der Lochschrauben ist es bekannt (EP-A 172130), die Schlüsselbohrum, gestuft mit einem größeren äußeren und einem kleineren inneren Sechskcnt zu versehen. Hauptsächlich soll dadurch die Möglichkeit geschaffen werden, in solchen Krankenhäusern, in denen Lochschrauben nicht verwendet werden und in denen daher die auf den bei Lochschrauben üblichen größeren Sechskant abgestimmten Instrumente nicht zur Verfügung stehen, mittels des kleineren Innensechskantö auchBone screws are traditionally made with a lens-shaped Head and hexagon socket manufactured (DIN 58812 ff.). When loosening a very tight bone screw, it can if the key is tilted or not inserted deep enough, the key attachment surfaces will be deformed Wrench hole come, so that this is unusable. It is known for the special case of cannulated screws (EP-A 172130), the key bit, graded with a larger one outer and a smaller inner hexagon. The main aim is to create the possibility in those hospitals in which cannulated screws are not used and in which therefore the on the with cannulated screws Usual larger hexagon-tuned instruments are not available, by means of the smaller hexagon socket too

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lift lit IIIlift lit III

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«■•III Il III tC te«■ • III Il III tC te

das übliche Instrumentarium verwendbar zu machen. Außerdem hat die bekannte Ausführung den Vorteil, daß dann, wenn einer der beiden Sechskantflächen durch verkantetes Einsetzen eines Werkzeugs unbrauchbar geworden sein sollte, noch der andere Innensechskant zur Verfügung steht. Schließlich wird die Möglichkeit erwähnt, ein Spezialwerkzeug zu verwenden, das einen gestuften Schlüsselzapfen aufweist, der an beide Innensechskante gleichermaßen angepaßt ist und dadurch eine große Sicherheit gegen Verkanten bietet und daher für die Ausübung eines besonders großen Ausdrehmoments geeignet ist. Jedoch ist diese Technik bei normalen Schrauben - anders als bei Lochschrauben - nicht anwendbar, weil der Kopf keine für die Unterbringung von zwei Schlüsselbohrungen übereinander ausreichenden Abmessungen hat.to make the usual instruments usable. Also has the known design has the advantage that if one of the Both hexagonal surfaces should have become unusable due to the tilted insertion of a tool, nor the other Allen key is available. Finally, there is mention of the possibility of using a specialized tool that has a stepped key pin which is equally adapted to both hexagon socket and thereby a offers great security against tilting and is therefore suitable for exercising a particularly large removal torque. However, this technique cannot be used with normal screws - unlike with cannulated screws - because the head does not have a the accommodation of two key bores on top of each other has sufficient dimensions.

Der Erfindung liegt die Aufgabe zugrunde, eine Knochenschraube zu schaffen, die trotz normaler Abmessungen die Aufbringung eines größeren Drehmoments gestattet.The invention is based on the object of creating a bone screw which, despite normal dimensions, can be applied a larger torque allowed.

Die erfindungsgemäße Lösung besteht darin, daß konzentrisch zu der Schlüsselbohrung ein vom Kreisquerschnitt abweichender Schlüsselzapfen, insbesondere ein Außensechskant, vorgesehen ist. Die Innen- und Außenformen sind im Winkel zweckmäßigerweise aufeinander abgestimmt, damit ein Werkzeug verwendet werden kann, das sowohl auf die Schlüsselbohrung als auch auf den Schüsralzapfen einwirkt.The solution according to the invention consists in that being concentric of the key hole deviating from the circular cross-section Key pin, in particular an external hexagon, is provided. The inner and outer shapes are expediently at an angle coordinated so that a tool can be used that works both on the wrench hole and on acts on the wrench pin.

Ein dafür geeigneter Schlüssel weist außer einem Zapfen zum Zusammenwirken mit der Schlüsselbohrüng eine Bohrung zum Zusammenwirken mit dem Schlüsselzapfen der Schraube auf.A key suitable for this has, in addition to a pin for interacting with the Schlüsselbohrüng, a hole for Cooperation with the key pin on the screw.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel veranschaulicht. Die einzige Figur zeigt die perspektivischeThe invention is explained in more detail below with reference to the drawing, which shows an advantageous embodiment illustrated. The only figure shows the perspective

t t toe tt toe

Ansicht eines Schraubenkopfs und eines dazu passenden Schlüssels.View of a screw head and a matching one Key.

Der Schraubenkopf (1) weist die übliche kalottenförmige Unterfläche (2) auf, die in den Schaft (3) übergeht. Außer der üblichen Innensechskant-Schlüsselbohrung (4) ist er mit dazu parallelen ArißenseQheka.ntflänhen (5) versehen.The screw head (1) has the usual dome-shaped lower surface (2), which merges into the shaft (3). In addition to the usual Allen key hole (4), it is also included parallel ArissenseQheka.ntflänhen (5) provided.

Der Kopf (6) des zugehörigen Schlüssels weist außer dem Zapfen (7), der zum Zusammenwirken mit der Schlüsselbohrung (4) des Schraubenkopfs (1) bestimmt ist, einen den Zapfen (7) umgebenden Ring (8) auf, dessen Innenfläche als Innensechskantbohrung (9) ausgebildet ist und zu dem Außensechskant (5) des Schraubenkopfs paßt.The head (6) of the associated key has, in addition to the pin (7), which interacts with the key hole (4) of the Screw head (1) is intended to surround the pin (7) Ring (8), the inner surface of which is designed as a hexagon socket (9) and to the external hexagon (5) of the Screw head fits.

Da sämtliche Schlüsselflächen gleichzeitig in Eingriff gefangen, kann ein hohes Drehmoment übertragen werden. Eine etwaige Verkantung des Schlüssels ist leicht erfühlbar, wenn die Stirnfläche (10) des Schlüsselkopfs und die Stirnkranzflächen (11) des Schraubenkopfs zusammenwirken, und kann daher leicht vermieden werden.Since all wrench flats are caught in engagement at the same time, a high torque can be transmitted. Any tilting of the key can easily be felt when the end face (10) of the wrench head and the end rim surfaces (11) of the screw head cooperate, and can therefore easily avoided.

Selbstverständlich können die Schlüsselbohrungen (4) und der Schlüsselzapfen (5) der Schraube auch unabhängig voneinander durch nur jeweils mit ihnen zusammenwirkende Schlüssel verwendet werden.Of course, the key bores (4) and the key pin (5) of the screw can also be independent of one another can only be used by keys that interact with them.

Claims (3)

i Λ Λ Λ 3 S 3 a e a a Waldemar Link GmbH & Co, Hamburg ρ 11913/86 D/fi Knochenschraube Ansprüchei Λ Λ Λ 3 S 3 a e a a Waldemar Link GmbH & Co, Hamburg ρ 11913/86 D / fi bone screw claims 1. Knochenschraube, deren Kopf eine Schlüsselbohrung mit einem vom der Kreisform abweichenden Querschnittsform, insbesondere Innensechskant, aufweist, dadurch gekennzeichnet, daß sie konzentrisch dazu einen Schlüsselzapfen mit vom Kreisquerschnitt abweichender Außenform, insbesondere einen Außensechskant (5), aufweist.1. Bone screw, the head of which has a key hole with a cross-sectional shape deviating from the circular shape, in particular Hexagon socket, characterized in that it is concentric with a key pin with from Circular cross-section deviating outside shape, in particular an external hexagon (5). 2. Knochenschraube nach Anspruch 1, dadurch gekennzeichnet, daß Innen- und Außenform in Winkel aufeinander abgestimmt sind.2. Bone screw according to claim 1, characterized in that the inner and outer shape are matched to one another at an angle are. 3. Schlüssel für eine Knochenschraube nach Anspruch 2, dadurch gekennzeichnet, daß er außer einem Zapfen (7) zum Zusammenwirken mit der Schlüsselbohrung (4) der Schraube eine Bohrung (9) zum Zusammenwirken mit dem Schlüsselzapfen (5) der Schraube aufweist.3. Key for a bone screw according to claim 2, characterized in that it has, in addition to a pin (7) for cooperation with the key bore (4) of the screw, a bore (9) for cooperation with the key pin (5) of the screw. • · ill I Il I• · ill I Il I • II·• II ·
DE19868613638 1986-05-20 1986-05-20 Bone screw Expired DE8613638U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19868613638 DE8613638U1 (en) 1986-05-20 1986-05-20 Bone screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19868613638 DE8613638U1 (en) 1986-05-20 1986-05-20 Bone screw

Publications (1)

Publication Number Publication Date
DE8613638U1 true DE8613638U1 (en) 1986-09-04

Family

ID=6794759

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19868613638 Expired DE8613638U1 (en) 1986-05-20 1986-05-20 Bone screw

Country Status (1)

Country Link
DE (1) DE8613638U1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1698295A1 (en) * 2005-03-01 2006-09-06 Linvatec Corporation Bone screw and driver system
WO2009073663A1 (en) * 2007-12-04 2009-06-11 Simpson Strong-Tie Company, Inc. Raised recess truss head screw
US8636783B2 (en) 2006-12-29 2014-01-28 Zimmer Spine, Inc. Spinal stabilization systems and methods
DE102018118474A1 (en) * 2018-07-31 2020-02-06 F. Reyher Nchfg. GmbH & Co. KG Combination screw

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1698295A1 (en) * 2005-03-01 2006-09-06 Linvatec Corporation Bone screw and driver system
US8636783B2 (en) 2006-12-29 2014-01-28 Zimmer Spine, Inc. Spinal stabilization systems and methods
WO2009073663A1 (en) * 2007-12-04 2009-06-11 Simpson Strong-Tie Company, Inc. Raised recess truss head screw
DE102018118474A1 (en) * 2018-07-31 2020-02-06 F. Reyher Nchfg. GmbH & Co. KG Combination screw

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