DE10337672B4 - Bone hollow screw - Google Patents

Bone hollow screw Download PDF

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Publication number
DE10337672B4
DE10337672B4 DE2003137672 DE10337672A DE10337672B4 DE 10337672 B4 DE10337672 B4 DE 10337672B4 DE 2003137672 DE2003137672 DE 2003137672 DE 10337672 A DE10337672 A DE 10337672A DE 10337672 B4 DE10337672 B4 DE 10337672B4
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DE
Germany
Prior art keywords
hollow screw
bone
shaft
screw
section
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 - Fee Related
Application number
DE2003137672
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German (de)
Other versions
DE10337672A1 (en
Inventor
Karl-Heinz Otto
Thomas Dr. Ebel
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Tricumed Medizintechnik GmbH
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Tricumed Medizintechnik GmbH
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Priority to DE2003137672 priority Critical patent/DE10337672B4/en
Publication of DE10337672A1 publication Critical patent/DE10337672A1/en
Application granted granted Critical
Publication of DE10337672B4 publication Critical patent/DE10337672B4/en
Anticipated expiration legal-status Critical
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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
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/04—Metals or alloys
    • A61L27/06—Titanium or titanium alloys
    • 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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/8635—Tips of screws
    • 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
    • A61B17/8645—Headless screws, e.g. ligament interference screws
    • 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
    • A61B17/866—Material or manufacture

Abstract

Knochenhohlschraube mit einem Schaft (10), wenigstens einem um den Schaft (10) umlaufenden Außengewindeabschnitt (12) und einem sich zentral durch den Schaft (12) erstreckenden, im Querschnitt unrunden Kanal (14), dadurch gekennzeichnet, dass die Hohlschraube aus einer pulverisierten und sodann gesinterten Titanlegierung besteht.Bone hollow screw with a shaft (10), at least one surrounding the shaft (10) Externally threaded section (12) and a central through the shaft (12) extending, in cross-section non-circular channel (14), characterized in that the hollow screw of a powdered and then sintered Titanium alloy exists.

Figure 00000001
Figure 00000001

Description

Die Erfindung betrifft eine Knochenhohlschraube nach dem Oberbegriff des Anspruchs 1 also ein mit einem Außengewinde versehenes, im Rahmen eines chirurgischen Eingriffs am Menschen eingesetztes, zur Verbindung von zwei Knochen miteinander oder zur Befestigung eines Bauteils an einem Knochen in den Knochen einzuschraubendes Element.The The invention relates to a hollow bone screw according to the preamble of claim 1 thus provided with an external thread in the frame a surgical procedure used on humans, for connection of two bones with each other or for fixing a component element to be screwed into bone on a bone.

Aus der EP 0 407 434 B1 ist eine Knochenhohlschraube mit den Merkmalen des Oberbegriffs des Anspruchs 1 bekannt, die bereits mit einem zentralen, im Querschnitt unrunden Kanal versehen ist, in den ein Werkzeug eingeführt werden kann.From the EP 0 407 434 B1 a bone hollow screw with the features of the preamble of claim 1 is known, which is already provided with a central, non-circular in cross-section channel into which a tool can be inserted.

Bei derartigen Knochenhohlschrauben stellt sich das Problem der Einbringung des unrunden Kanals in die Knochenhohlschraube, die durch Bohren nicht zu bewerkstelligen ist.at such hollow bone screws raises the problem of introduction of the non-round channel in the bone hollow screw, which by drilling not to accomplish is.

Aus der EP 1 119 429 B1 ist es bekannt, in den menschlichen Körper zu implantierende, aus einer Titanlegierung bestehende Bauelemente durch ein Metallspritzgussverfahren herzustellen.From the EP 1 119 429 B1 It is known to produce in the human body to be implanted, consisting of a titanium alloy components by a metal injection molding process.

Der Erfindung liegt die Aufgabe zugrunde, eine Knochenhohlschraube zu schaffen, die auf einfache Weise mit einem unrunden Kanal versehen ist.Of the Invention is based on the object, a bone hollow screw create a simple way with a non-circular channel is.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst, der Unteranspruch gibt eine vorteilhafte Ausgestaltung der Erfindung an.According to the invention this Problem solved by the features of claim 1, the dependent claim an advantageous embodiment of the invention.

Die Erfindung wird im folgenden anhand einer Zeichnung erläutert deren 1 eine Knochenschraube in einem Längsschnitt und deren 2 die Knochenhohlschraube in einem Querschnitt wiedergibt.The invention will be explained below with reference to a drawing 1 a bone screw in a longitudinal section and their 2 reproduces the bone hollow screw in a cross section.

Die Knochenhohlschraube besteht aus einem Schaft 10, wenigstens einem um den Schaft 10 umlaufenden Außengewindeabschnitt 12 und einem sich zentral durch den Schaft 10 erstreckenden Kanal 14. Der Kanal 14 ist im Querschnitt sechskantig, was das Ein- und Ausschrauben der Schraube mit einem zu dem Innenquerschnitt des Kanals komplementär ausgebildeten Werkzeug (einem Inbusschlüssel) erlaubt, was eine Krafteinleitung über die gesamte Länge des Schafts 10 und damit ein Vermeiden übergroßer Scherkräfte erlaubt.The bone hollow screw consists of a shaft 10 , at least one around the shaft 10 circumferential external thread section 12 and one centrally through the shaft 10 extending channel 14 , The channel 14 is hexagonal in cross section, which allows the screwing in and unscrewing the screw with a complementary to the inner cross section of the channel formed tool (an Allen key), which is an introduction of force over the entire length of the shaft 10 and thus avoiding excessive shear forces.

Bei Bruch des Schafts 10 der Schraube (etwa bei einer durch einen Unfall bewirkten Verschiebung der durch die Schraube miteinander verbundenen Knochen) bildet der unrund, vorzugsweise sechskantig ausgebildete Kanal 14 auch des distalen Teils der Schraube eine Angriffsfläche für ein Werkzeug und erlaubt so eine Herausschrauben aus dem Knochen.At breakage of the shaft 10 the screw (approximately in a caused by an accident displacement of the interconnected by the screw bone) forms the non-circular, preferably hexagonal channel formed 14 Also, the distal part of the screw an attack surface for a tool, allowing a unscrewing from the bone.

Die erfindungsgemäße Knochenhohlschraube besteht aus einer durch Pulverisieren, Spritzgießen und Sintern geformten Titanlegierung, was die unrunde Ausbildung des Kanals im Inneren des Schafts relativ problemlos ermöglicht.The Bone hollow screw according to the invention consists of a titanium alloy formed by pulverization, injection molding and sintering, what the non-circular formation of the channel inside the shaft relative easily possible.

Claims (2)

Knochenhohlschraube mit einem Schaft (10), wenigstens einem um den Schaft (10) umlaufenden Außengewindeabschnitt (12) und einem sich zentral durch den Schaft (12) erstreckenden, im Querschnitt unrunden Kanal (14), dadurch gekennzeichnet, dass die Hohlschraube aus einer pulverisierten und sodann gesinterten Titanlegierung besteht.Bone hollow screw with a shank ( 10 ), at least one around the shaft ( 10 ) circumferential male threaded portion ( 12 ) and one centrally through the shaft ( 12 ) extending, in cross-section non-circular channel ( 14 ), characterized in that the hollow screw consists of a pulverized and then sintered titanium alloy. Knochenhohlschraube nach Anspruch 1, dadurch gekennzeichnet, dass der Kanal (14) im Querschnitt sechskantig ist.Bone hollow screw according to claim 1, characterized in that the channel ( 14 ) is hexagonal in cross section.
DE2003137672 2003-08-16 2003-08-16 Bone hollow screw Expired - Fee Related DE10337672B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

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DE2003137672 DE10337672B4 (en) 2003-08-16 2003-08-16 Bone hollow screw

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DE10337672A1 DE10337672A1 (en) 2005-03-17
DE10337672B4 true DE10337672B4 (en) 2006-05-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807364C2 (en) * 1977-02-24 1988-01-07 Interfix Ltd., Hongkong, Hk
EP0407434B1 (en) * 1988-04-02 1993-09-22 Aesculap Ag Bone screw
US6283973B1 (en) * 1998-12-30 2001-09-04 Depuy Orthopaedics, Inc. Strength fixation device
EP1119429B1 (en) * 1998-07-29 2003-07-02 Gkss-Forschungszentrum Geesthacht Gmbh Method for producing components by metallic powder injection moulding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807364C2 (en) * 1977-02-24 1988-01-07 Interfix Ltd., Hongkong, Hk
EP0407434B1 (en) * 1988-04-02 1993-09-22 Aesculap Ag Bone screw
EP1119429B1 (en) * 1998-07-29 2003-07-02 Gkss-Forschungszentrum Geesthacht Gmbh Method for producing components by metallic powder injection moulding
US6283973B1 (en) * 1998-12-30 2001-09-04 Depuy Orthopaedics, Inc. Strength fixation device

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8364 No opposition during term of opposition
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20110301