DE4341980A1 - Osteosynthesis bone plate with several holes - Google Patents

Osteosynthesis bone plate with several holes

Info

Publication number
DE4341980A1
DE4341980A1 DE19934341980 DE4341980A DE4341980A1 DE 4341980 A1 DE4341980 A1 DE 4341980A1 DE 19934341980 DE19934341980 DE 19934341980 DE 4341980 A DE4341980 A DE 4341980A DE 4341980 A1 DE4341980 A1 DE 4341980A1
Authority
DE
Germany
Prior art keywords
bone
thread
conical
screw
bone plate
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.)
Granted
Application number
DE19934341980
Other languages
German (de)
Other versions
DE4341980B4 (en
Inventor
Walter Oertel
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.)
Koenigsee Implantate und Instrumente zur Osteosynthese GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19934341980 priority Critical patent/DE4341980B4/en
Priority to DE9321544U priority patent/DE9321544U1/en
Publication of DE4341980A1 publication Critical patent/DE4341980A1/en
Application granted granted Critical
Publication of DE4341980B4 publication Critical patent/DE4341980B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1728—Guides or aligning means for drills, mills, pins or wires for holes for bone plates or plate 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread

Abstract

In the bone plate are fitted round or elongated holes (2) in longitudinal direction for bone screws (3). The holes comprise a conical thread (4) extending toward the bone surface. Each bone screw has a screw head (5) with a conical outer thread matching that of the hole thread. Into the holes is insertable a boring template (6) has a conical thread analogous to the hole thread, and a central inner thread (7) identical to that of the bore screw. At least one longitudinal bore pref. has different end side radii and a peripheral inner thread.

Description

Die Erfindung betrifft eine osteosynthetische Knochenplatte mit mehreren in Längsrichtung angeordneten runden und/oder länglichen Löchern zur Aufnahme von Knochenschrauben, sowie dazugehörige Knochenschrauben und eine Bohrlehre.The invention relates to an osteosynthetic bone plate with several in the longitudinal direction arranged round and / or elongated holes for receiving bone screws, as well associated bone screws and a drilling jig.

Nach der CH-PS 6 73 762 ist eine osteosynthetische Druckplatte mit mehreren in der Längsachse der Druckplatte angeordneten Löchern zur Aufnahme von Knochenschrauben bekannt. Das Querschnittsprofil der Druckplatte ist derart gestaltet, daß die zur Knochenoberfläche parallelen Schnittflächen durch die Druckplatte sich mit zunehmendem Abstand von der Knochenoberfläche erweitern. Die zur Auflage auf den Knochen bestimmte Unterseite der Druckplatte weist zusätzlich sphärische Vertiefungen auf, so daß unmittelbar nach der Implantation Hohlräume zwischen Knochen und Druckplatte resultieren. Die Löcher sind symmetrisch zur Längsachse länglich ausgebildet und besitzen an ihren längsseitigen Wandungen ein gegenüber der Oberseite der Druckplatte abgesenktes Widerlager, auf dem sich der Schraubenkopf parallel zur Längsachse verschieben kann. Bei der Verwendung der Druckplatte wird die Knochenoberfläche nach bekannten Operationstechniken aufgeschlossen, die Knochenbruchstücke aneinandergefügt und ausgerichtet, die Druckplatte aufgebracht und eine sichere Verbindung durch festes Anpressen und Verschrauben mit Knochenschrauben hergestellt. Obwohl die Druckplatte nach erfolgter Knochenbruchheilung einfacher, d. h. ohne Zuhilfenahme von Instrumenten und ohne Zerstörung der neugebildeten Knochenlamellen des Plattenbettes erfolgen kann, werden immer noch durch den starken Anpreßdruck der Druckplatte auf die Knochenoberfläche die Versorgung des Knochens und seine Heilung beeinträchtigt.According to CH-PS 6 73 762 is an osteosynthetic printing plate with several in the longitudinal axis the pressure plate arranged holes for receiving bone screws known. The cross-sectional profile of the pressure plate is designed such that the parallel to the bone surface Cut areas through the pressure plate increase with increasing distance from the bone surface expand. The underside of the pressure plate intended for resting on the bones additionally has spherical depressions, so that cavities immediately after the implantation result between bone and pressure plate. The holes are symmetrical to the Longitudinal axis are elongated and have an opposite on their longitudinal walls the top of the pressure plate lowered abutment on which the screw head can move parallel to the longitudinal axis. When using the pressure plate, the bone surface the bone fragments unlocked according to known surgical techniques joined together and aligned, the pressure plate applied and a secure connection manufactured by firmly pressing and screwing with bone screws. Although the Pressure plate easier after bone fracture healing, d. H. without the use of instruments and without destroying the newly formed bone lamellae of the plate bed can, are still due to the strong pressure of the pressure plate on the bone surface the care of the bone and its healing is impaired.

Aufgabe der Erfindung ist es deshalb, eine Knochenplatte mit dazugehörigen Knochenschrauben und einer Bohrlehre zu entwickeln, die eine sichere Verbindung der Knochenbruchstücke auch unter Kompressionsbedingungen ermöglicht und nur durch den Sitz der Knochenschrauben im Knochen erreicht wird. The object of the invention is therefore a bone plate with associated bone screws and to develop a drilling jig that securely connects the bone fragments even possible under compression conditions and only by the seat of the bone screws is achieved in the bone.  

Die gestellte Aufgabe wird erfindungsgemäß durch die im Anspruch 1 genannten Merkmale gelöst.The object is achieved by the features mentioned in claim 1 solved.

Die osteosynthetische Knochenplatte wird wie bekannt an den Knochen angerichtet und lose auf den Knochen aufgelegt, ohne daß die Knochenhaut zu entfernen ist. Nacheinander werden in die Löcher mit dem konischen Gewinde die Bohrbuchse eingesetzt, das Knochenbruchstück vorgebohrt und das Gewinde in den Knochen geschnitten. Anschließend wird die Bohrlehre entfernt und die Knochenschraube eingeschraubt, bis der Schraubenkopf fest in der Knochenplatte sitzt. Für einen festen Sitz der Knochenschrauben in den Knochenbruchstücken sollten diese selbstschneidend sein und nur die ersten Gänge vorgeschnitten werden.As is known, the osteosynthetic bone plate is placed on the bone and loosely placed on the bone without removing the periosteum. One by one the drill bushing, the bone fragment, is inserted into the holes with the conical thread predrilled and the thread cut into the bone. Then the drilling jig removed and screwed in the bone screw until the screw head is firmly in the bone plate sits. For a tight fit of the bone screws in the bone fragments should these are self-tapping and only the first courses are pre-cut.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß die osteosynthetische Knochenplatte keine pressende Verbindung zur Knochenoberfläche erzeugt und die stabile Verbindung der Knochenbruchstücke über das Verklemmen des Schraubenkopfes der Knochenschraube in dem konischen Gewinde der Löcher in der Knochenplatte erreicht wird. Dadurch kann die Knochenschraube in allen Richtungen Kräfte aufnehmen. So wird erreicht, daß die Knochenhaut nicht zusätzlich zerstört und der Heilungsprozeß verbessert werden.The advantages achieved with the invention are in particular that the osteosynthetic Bone plate creates no pressing connection to the bone surface and the stable Connection of the bone fragments via the jamming of the screw head of the bone screw in the conical thread of the holes in the bone plate. Thereby the bone screw can absorb forces in all directions. This ensures that the periosteum is not additionally destroyed and the healing process is improved.

Eine vorteilhafte Ausgestaltung der Erfindung ist im Anspruch 2 angegeben. Durch diese Weiterbildung wird erreicht, daß beim Festziehen der Knochenschraube eine Längsbewegung längs der Knochenplatte erfolgt und so die Knochenbruchstücke aneinandergepreßt werden.An advantageous embodiment of the invention is specified in claim 2. Through this training is achieved that a longitudinal movement when tightening the bone screw takes place along the bone plate and so the bone fragments are pressed together.

Die Weiterbildung der Erfindung nach Anspruch 3 erlaubt ein präzises Einbringen der Knochenschrauben und einen festen Sitz in den Knochenbruchstücken.The development of the invention according to claim 3 allows a precise insertion of the bone screws and a tight fit in the bone fragments.

Die Erfindung soll nachstehend anhand eines Ausführungsbeispieles näher erläutert werden. In der zugehörigen Zeichnung zeigen:The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing:

Fig. 1 eine Knochenplatte mit eingesetzter Bohrlehre und Knochenschraube. Fig. 1 shows a bone plate with inserted drilling jig and bone screw.

Fig. 2 eine Knochenplatte mit länglichem Loch zur Aufnahme der Knochenschrauben und Fig. 2 shows a bone plate with an elongated hole for receiving the bone screws and

Fig. 3 eine Draufsicht auf die Knochenplatte aus Fig. 2. Fig. 3 is a plan view of the bone plate of FIG. 2.

Eine osteosynthetische Knochenplatte 1 weist in Abhängigkeit von ihrer Anwendung mehrere Löcher 2 zur Aufnahme von Knochenschrauben 3 auf. Die Löcher 2 sind derart gestaltet, daß sie ein zur Knochenoberfläche verlaufendes konisches Gewinde 4 aufweisen. Analog dazu ist der Schraubenkopf 5 der Knochenschraube 3 ebenfalls mit einem konischen Gewinde versehen. Dabei sind die Gewindesteigung des Knochengewindes und die des Kopfgewindes der Knochenschraube 3 gleich. Eine in die Löcher 2 einsetzbare Bohrlehre 6 weist ebenfalls ein konisches Außengewinde auf, das analog zum konischen Gewinde 4 verläuft. Die Bohrlehre 6 ist weiterhin mit einem durchgehenden Innengewinde 7 zur Führung eines Gewindebohrers versehen.Depending on its application, an osteosynthetic bone plate 1 has a plurality of holes 2 for receiving bone screws 3 . The holes 2 are designed such that they have a conical thread 4 running to the bone surface. Similarly, the screw head 5 of the bone screw 3 is also provided with a conical thread. The thread pitch of the bone thread and that of the head thread of the bone screw 3 are the same. A drilling jig 6 which can be inserted into the holes 2 likewise has a conical external thread which runs analogously to the conical thread 4 . The drilling jig 6 is also provided with a continuous internal thread 7 for guiding a tap.

Durch die Gestaltung der Löcher 2 in der Knochenplatte 1 und des Schraubenkopfes 5 der Knochenschraube 3 mit einem konischen Gewinde wird erreicht, daß sich der Schraubenkopf 5 beim Anziehen in der Knochenplatte 1 verklemmt und die Knochenschrauben 3 so fest mit der Knochenplatte 1 verbunden wird. Die Lage des einzubringenden Knochengewindes zum konischen Gewinde 4 in der Knochenplatte 1 wird durch die Führung des Gewindebohrers in der Bohrlehre 6 gewährleistet.The design of the holes 2 in the bone plate 1 and the screw head 5 of the bone screw 3 with a conical thread ensures that the screw head 5 is jammed in the bone plate 1 when tightening and the bone screws 3 are thus firmly connected to the bone plate 1 . The position of the bone thread to be introduced relative to the conical thread 4 in the bone plate 1 is ensured by the guidance of the tap in the drilling jig 6 .

Der Vorteil dieser Lösung liegt darin, daß die sichere Verbindung der Knochenbruchstücke nicht durch ein Anpressen der Knochenplatte 1 auf der Knochenoberfläche sondern nur durch den Sitz der Knochenschrauben 3 in den Knochenbruchstücken erreicht wird. Damit wird die Knochenhaut nicht zusätzlich beeinträchtigt und der Heilungsprozeß wird beschleunigt.The advantage of this solution is that the secure connection of the bone fragments is not achieved by pressing the bone plate 1 on the bone surface but only by the seat of the bone screws 3 in the bone fragments. This means that the periosteum is not additionally impaired and the healing process is accelerated.

In einer weiteren Ausführung kann, wie in den Fig. 2 und 3 dargestellt, mindestens ein Loch 8 in der Knochenplatte 1 parallel zu ihrer Längsachse eine längliche Form aufweisen, wobei die endseitigen Radien unterschiedliche Abmessungen besitzen. Der zur Knochenbruchstelle abgewandte Radius ist kleiner gestaltet als der zur Knochenbruchstelle zugewandte Radius. Das Loch 8 ist konisch gestaltet und mit einem umlaufenden Innengewinde 9 versehen. Die Konizität des Loches 8 entspricht wiederum der des Schraubenkopfes 5 der Knochenschraube 3. Der Vorteil dieser Lösung liegt darin, daß beim Festziehen der Knochenschraube 3 eine Bewegung längs der Knochenplatte und damit eine Kompression der Knochenbruchstücke erfolgt.In a further embodiment, as shown in FIGS. 2 and 3, at least one hole 8 in the bone plate 1 can have an elongated shape parallel to its longitudinal axis, the end radii having different dimensions. The radius facing away from the bone fracture is made smaller than the radius facing towards the bone fracture. The hole 8 is conical and provided with a circumferential internal thread 9 . The taper of the hole 8 in turn corresponds to that of the screw head 5 of the bone screw 3 . The advantage of this solution is that when the bone screw 3 is tightened there is a movement along the bone plate and thus a compression of the bone fragments.

Claims (3)

1. Osteosynthetische Knochenplatte mit mehreren in Längsrichtung angeordneten runden und/oder länglichen Löchern zur Aufnahme von Knochenschrauben, sowie Knochenschraube und Bohrlehre, dadurch gekennzeichnet, daß in die Knochenplatte (1) angeordneten Löcher (2) mit einem zur Knochenoberfläche verlaufenden konischen Gewinde (4) versehen sind, daß die Knochenschraube (3) einen Schraubenkopf (5) mit einem analog zum konischen Gewinde (4) verlaufenden konischen Außengewinde aufweist und daß die Bohrlehre (6) ein analog zum konischen Gewinde (4) verlaufendes konisches Außengewinde sowie ein zur Knochenschraube (3) identisches mittig angeordnetes Innengewinde (7) aufweist.1. Osteosynthetic bone plate with several longitudinally arranged round and / or elongated holes for receiving bone screws, as well as bone screw and drilling jig, characterized in that holes ( 2 ) arranged in the bone plate ( 1 ) with a conical thread ( 4 ) running to the bone surface. are provided that the bone screw ( 3 ) has a screw head ( 5 ) with a conical external thread that runs analogously to the conical thread ( 4 ) and that the drilling jig ( 6 ) has a conical external thread that runs analogous to the conical thread ( 4 ) as well as a to the bone screw ( 3 ) has an identical, centrally arranged internal thread ( 7 ). 2. Osteosynthetische Knochenplatte nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eines der in der Knochenplatte (1) angeordneten länglichen Löcher (8) mit endseitigen Radien unterschiedlicher Abmessungen und einem umlaufenden konischen Innengewinde (9) versehen ist.2. Osteosynthetic bone plate according to claim 1, characterized in that at least one of the elongated holes ( 8 ) arranged in the bone plate ( 1 ) is provided with end radii of different dimensions and a circumferential conical internal thread ( 9 ). 3. Osteosynthetische Knochenplatte nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Gewindesteigung des Knochengewindes und die des konischen Außengewindes des Schraubenkopfes (5) gleich sind.3. Osteosynthetic bone plate according to claims 1 and 2, characterized in that the thread pitch of the bone thread and that of the conical external thread of the screw head ( 5 ) are the same.
DE19934341980 1993-12-09 1993-12-09 Osteosynthetic bone plate Expired - Fee Related DE4341980B4 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19934341980 DE4341980B4 (en) 1993-12-09 1993-12-09 Osteosynthetic bone plate
DE9321544U DE9321544U1 (en) 1993-12-09 1993-12-09 Osteosynthetic plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934341980 DE4341980B4 (en) 1993-12-09 1993-12-09 Osteosynthetic bone plate

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DE4341980A1 true DE4341980A1 (en) 1995-06-14
DE4341980B4 DE4341980B4 (en) 2005-02-17

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WO2000053110A1 (en) * 1999-03-09 2000-09-14 Synthes Ag Chur Bone plate
WO2000053111A1 (en) * 1999-03-09 2000-09-14 Synthes Ag Chur Bone plate with conical screw threads
US6623486B1 (en) 1999-09-13 2003-09-23 Synthes (U.S.A.) bone plating system
US6669701B2 (en) 2000-01-27 2003-12-30 Synthes (Usa) Bone plate
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US6821278B2 (en) 2000-06-26 2004-11-23 Synthes Ag Chur Bone plate
WO2006072379A1 (en) 2004-12-30 2006-07-13 Königsee Implantate und Instrumente zur Osteosynthese GmbH Osteosynthesis plate, e.g. a plate for the head of the radius- or humerus, with a plurality of bore holes for receiving bone screws
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WO1997009000A1 (en) * 1995-09-06 1997-03-13 Synthes Ag Chur Bone plate
DE19858889B4 (en) * 1998-12-19 2008-08-07 Wolter, Dietmar, Prof. Dr.Med. Fixation system for bones
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KR100604452B1 (en) * 1999-03-09 2006-07-26 신테스 아게 츄어 Bone plate
WO2000053110A1 (en) * 1999-03-09 2000-09-14 Synthes Ag Chur Bone plate
WO2000053111A1 (en) * 1999-03-09 2000-09-14 Synthes Ag Chur Bone plate with conical screw threads
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US7341589B2 (en) 1999-09-13 2008-03-11 Synthes (U.S.A.) Bone plating system
US6623486B1 (en) 1999-09-13 2003-09-23 Synthes (U.S.A.) bone plating system
US9161791B2 (en) 2000-01-27 2015-10-20 DePuy Synthes Products, Inc. Bone Plate
US6669701B2 (en) 2000-01-27 2003-12-30 Synthes (Usa) Bone plate
US7354441B2 (en) 2000-01-27 2008-04-08 Synthes (U.S.A.) Bone plate
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