WO2000019925A1 - Intermedullary nail - Google Patents
Intermedullary nail Download PDFInfo
- Publication number
- WO2000019925A1 WO2000019925A1 PCT/DE1999/003254 DE9903254W WO0019925A1 WO 2000019925 A1 WO2000019925 A1 WO 2000019925A1 DE 9903254 W DE9903254 W DE 9903254W WO 0019925 A1 WO0019925 A1 WO 0019925A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cap
- intramedullary nail
- proximal end
- nail
- screwed
- Prior art date
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
- A61B17/72—Intramedullary pins, nails or other devices
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
-
- 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
- A61B17/1725—Guides or aligning means for drills, mills, pins or wires for applying transverse screws or pins through intramedullary nails or pins
-
- 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
- A61B17/685—Elements to be fitted on the end of screws or wires, e.g. protective caps
-
- 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
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
- A61B17/921—Impactors or extractors, e.g. for removing intramedullary devices for intramedullary devices
Definitions
- the invention relates to an intramedullary nail which can be connected at the proximal end to a holder arrangement for inserting or extracting the nail, an external and / or an internal thread being provided for fastening the holding arrangement to the proximal end of the intramedullary nail
- the object of the invention is to provide an intramedullary nail in which welding of the cap to the end of the intramedullary nail is prevented.
- Fig. 4 shows a modified version of the intramedullary nail
- the intramedullary nail 1 has an external thread 2 at the end.
- the cap 3 shown in FIG. 2 has an internal thread 6.
- FIG. 4 shows an intramedullary nail 1 with an internal thread 13. 10 denotes a notch at the proximal end of the intramedullary nail, which interacts with a screw which serves to lock the intramedullary nail in the bone.
- FIGS. 5 and 6 show a cap which has an undercut 8 on the outside of the base. This undercut makes it possible to use an instrument with which the cap is not only rotatable but can also be held.
- the elastic molded element 15 is located on the outside of the cap and comes to rest on the upper edge of the intramedullary nail according to FIG. 4 when the cap is screwed in.
- FIG. 6 shows a cap with an external threaded pin 16.
- the elastic molded element lies on the edge of the recess of the intramedullary nail after being screwed in, so that a build-up of tension between the cap and intramedullary nail is avoided.
Abstract
The invention relates to an intermedullary nail that can be joined on a proximal end to a holder for the insertion or extraction of the nail, whereby an outer and/or inner thread is provided on the proximal end of the nail for securing the holder thereto. As known per se, a cap (3) with a matching thread can be screwed onto the proximal end. An elastic moulded element (15) is provided on the bottom (7) of the cap. The proximal end of the intermedullary nail (1) is brought into contact with said element when the cap (3) is screwed on.
Description
MarknagelIntramedullary nail
Die Erfindung betrifft einen Marknagel der am proximalen Ende mit einer Haiteanordnung für das Einsetzen bzw. Extrahieren des Nagels verbindbar ist, wobei zur Befestigung der Halteanordnung am proximalen Ende des Marknagels ein Außen- und/oder ein Innengewinde vorgesehen sindThe invention relates to an intramedullary nail which can be connected at the proximal end to a holder arrangement for inserting or extracting the nail, an external and / or an internal thread being provided for fastening the holding arrangement to the proximal end of the intramedullary nail
Ein derartiger Marknagel ist beispielsweise aus der EP 565216 bekannt.Such an intramedullary nail is known, for example, from EP 565216.
Bei Marknägeln ist es darüber hinaus bekannt am proximalen Ende eine Kappe aufzusetzen. Diese liegt in der Gegend der Knochenöffnung, durch die der Marknagel eingebracht wurde und dient zum einen als Platzhalter für das Ausschlaginstrumentarium. Andererseits werden die senkrecht zur Marknagelachse liegenden Bohrungen vor dem Einwachsen von Gewebe geschützt, so daß das Ausschlaginstrumentarium ohne zusätzliche Arbeitsgänge eingeschraubt werden kann.With intramedullary nails, it is also known to put a cap on the proximal end. This is in the area of the bone opening through which the intramedullary nail was inserted and serves on the one hand as a placeholder for the rash instruments. On the other hand, the holes perpendicular to the intramedullary nail axis are protected against tissue ingrowth, so that the extraction instruments can be screwed in without additional operations.
Als Werkstoff für die Marknägel und Kappen werden verschiedene Titanlegierungen verwendet, die infoige eines Spannungsaufbaues zu Kaltverschweißungen neigen. Dies kann dazu führen, daß die Kappe unter Umständen nur mit einem erheblichen Aufwand wieder von dem proximalen Ende des Marknagels zu trennen ist.Various titanium alloys are used as the material for the intramedullary nails and caps, which tend to cold weld when the tension builds up. This can mean that the cap can only be separated from the proximal end of the intramedullary nail with considerable effort.
Aufgabe der Erfindung ist es, einen Marknagel bereitzustellen, bei dem ein Verschweißen der Kappe mit dem Ende des Marknagel verhindert wird.The object of the invention is to provide an intramedullary nail in which welding of the cap to the end of the intramedullary nail is prevented.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß - wie an sich bekannt - auf das proximale Ende eine mit einem korrespondierenden Gewinde versehene Kappe aufschraubbar ist und daß im Kappengrund der Kappe ein elastisches Formelement vorgesehen ist, an dem das proximale Ende des Marknagels nach dem Aufschrauben der Kappe anliegt.
Weitere Ausgestaltungen ergeben sich aus den Unteransprüchen.This object is achieved in that - as is known per se - a cap provided with a corresponding thread can be screwed onto the proximal end and that an elastic molded element is provided in the cap base of the cap, on which the proximal end of the intramedullary nail after unscrewing the Cap fits. Further refinements result from the subclaims.
Die Erfindung soll nachfolgend unter Bezug auf die Zeichnungen erläutert werden.The invention will be explained below with reference to the drawings.
Dabei zeigt:It shows:
Fig. 1 eine vereinfachte Darstellung des Marknagels,1 is a simplified representation of the intramedullary nail,
Fig. 2 eine Ansicht der Kappe teilweise im Schnitt,2 is a view of the cap partially in section,
Fig. 3 das proximale Ende des Marknagels mit aufgeschraubter Kappe,3 shows the proximal end of the intramedullary nail with the cap screwed on,
Fig. 4 eine abgewandelte Ausführung des Marknagels undFig. 4 shows a modified version of the intramedullary nail and
Fig. 5 und 6 Ausbildungen der Kappe.5 and 6 designs of the cap.
Der Marknagel 1 hat gemäß Figur 1 am Ende ein Außengewinde 2. Die in Figur 2 dargestellt Kappe 3 weist ein Innengewinde 6 auf.According to FIG. 1, the intramedullary nail 1 has an external thread 2 at the end. The cap 3 shown in FIG. 2 has an internal thread 6.
Wie aus der Figur 2 bzw.. 3 ersichtlich, liegt das Ende des Marknagels 1 nach dem Aufschrauben der Kappe 3 an dem im Kappengrund 5 befindlichen elastischen Formelement 15 an, so daß eine direkte Berührung und damit ein Spannungsaufbau, der zu einem Verschweißen von Marknagelende und Kappe führen könnte, vermieden wird.As can be seen from FIGS. 2 and 3, the end of the intramedullary nail 1, after the cap 3 has been screwed on, rests against the elastic molded element 15 located in the cap base 5, so that there is direct contact and thus a build-up of tension, which leads to a welding of the intramedullary nail end and cap could be avoided.
Die Figur 4 zeigt einen Marknagel 1 mit einem Innengewinde 13. Mit 10 ist eine Kerbe am proximalen Ende des Marknagels bezeichnet, die mit einer Schraube zusammenwirkt, die zur Verriegelung des Marknagels im Knochen dient.FIG. 4 shows an intramedullary nail 1 with an internal thread 13. 10 denotes a notch at the proximal end of the intramedullary nail, which interacts with a screw which serves to lock the intramedullary nail in the bone.
Die Figuren 5 und 6 zeigen eine Kappe, die an der Bodenaußenseite eine Hinterschneidung 8 aufweist. Diese Hinterschneidung ermöglicht es, daß man ein Instrument verwenden kann, mit dem die Kappe nicht nur drehbar ist sondern auch festgehalten werden kann.
Bei der Ausführung nach Figur 5 befindet sich das elastische Formelement 15 an der Außenseite der Kappe und kommt beim Einschrauben der Kappe zur Auflage auf dem oberen Rand des Marknagels gemäß Figur 4.FIGS. 5 and 6 show a cap which has an undercut 8 on the outside of the base. This undercut makes it possible to use an instrument with which the cap is not only rotatable but can also be held. In the embodiment according to FIG. 5, the elastic molded element 15 is located on the outside of the cap and comes to rest on the upper edge of the intramedullary nail according to FIG. 4 when the cap is screwed in.
Die Figur 6 zeigt eine Kappe mit einem Außengewindestift 16. Auch hierbei liegt das elastische Formelement nach dem Einschrauben auf dem Rand der Ausnehmung des Marknagels auf, so daß ein Spannungsaufbau zwischen Kappe und Marknagel vermieden wird.
FIG. 6 shows a cap with an external threaded pin 16. Here, too, the elastic molded element lies on the edge of the recess of the intramedullary nail after being screwed in, so that a build-up of tension between the cap and intramedullary nail is avoided.
Claims
1. Marknagel der am proximalen Ende mit einer Halteanordnung für das Einsetzen bzw. Extrahieren des Nagels verbindbar ist, wobei zur Befestigung der Halteanordnung am proximalen Ende des Marknagels ein Außen- und/oder ein Innengewinde vorgesehen sind, ' dadurch gekennzeichnet, daß - wie an sich bekannt - auf das proximale Ende eine mit einem korrespondierenden Gewinde versehene Kappe (3) aufschraubbar ist und daß im Kappengrund (7) der Kappe (4) ein elastisches Formelement (15) vorgesehen ist, an dem das proximale Ende des Marknagels (1) nach dem Aufschrauben der Kappe (3) anliegt.1. intramedullary nail which can be connected at the proximal end to a holding arrangement for inserting or extracting the nail, an external and / or an internal thread being provided for fastening the holding arrangement to the proximal end of the intramedullary nail, ' characterized in that - as at known - a cap (3) provided with a corresponding thread can be screwed onto the proximal end and that an elastic molded element (15) is provided in the cap base (7) of the cap (4), on which the proximal end of the intramedullary nail (1) after screwing on the cap (3).
2. Marknagel nach Anspruch 1 , dadurch gekennzeichnet, daß der Marknagel am proximalen Ende ein Außengewinde (2) aufweist auf das die mit einem Innengewinde (6) versehene Kappe (4) aufschraubbar ist.2. intramedullary nail according to claim 1, characterized in that the intramedullary nail has an external thread (2) at the proximal end onto which the cap (4) provided with an internal thread (6) can be screwed on.
3. Marknagel nach Anspruch 1 , dadurch gekennzeichnet, daß der Marknagel ein Innengewinde (13) aufweist in das ein mit einem Außengewindestift 16 versehene Kappe (4) schraubbar ist.3. intramedullary nail according to claim 1, characterized in that the intramedullary nail has an internal thread (13) into which a cap (4) provided with an external threaded pin 16 can be screwed.
4. Marknagel nach Anspruch 1, dadurch gekennzeichnet, daß der Marknagel ein Innengewinde (13) aufweist in das eine mit einem Außengewinde 12 versehene Kappe (4) einschraubbar ist.4. intramedullary nail according to claim 1, characterized in that the intramedullary nail has an internal thread (13) into which a cap (4) provided with an external thread 12 can be screwed.
5. Marknagel nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß an dem äußeren Kappenboden eine Hinterschneidung (8) vorgesehen ist. 5. intramedullary nail according to one of the preceding claims, characterized in that an undercut (8) is provided on the outer cap bottom.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29818323.4 | 1998-10-02 | ||
DE29818323U DE29818323U1 (en) | 1998-10-02 | 1998-10-02 | Intramedullary nail |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000019925A1 true WO2000019925A1 (en) | 2000-04-13 |
Family
ID=8063894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003254 WO2000019925A1 (en) | 1998-10-02 | 1999-10-01 | Intermedullary nail |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE29818323U1 (en) |
WO (1) | WO2000019925A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003063721A1 (en) | 2000-08-16 | 2003-08-07 | Align Technology, Inc. | Systems and methods for removing gingiva from teeth |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE529060T1 (en) * | 2007-11-13 | 2011-11-15 | Citieffe Srl | REMOVABLE CLOSURE UNIT FOR AXIAL BONE CONSOLIDATION IMPLANTS |
CN108523983A (en) * | 2018-03-22 | 2018-09-14 | 中国人民解放军第七五医院 | A kind of blocking nail merging auxiliary device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0250057A2 (en) * | 1986-06-20 | 1987-12-23 | DS-Chemie GmbH | Moulding mass |
WO1989007056A1 (en) * | 1988-01-29 | 1989-08-10 | Biomet, Inc. | Variable wall thickness interlocking intramedullary nail and method for making same |
FR2656212A1 (en) * | 1989-12-27 | 1991-06-28 | Hardy Jeanmarie | CENTRO-MEDALLIONAL ENCLOSURE SYSTEM FOR IMMOBILIZING A FRACTURE OF A BONE. |
EP0565216A2 (en) | 1992-04-10 | 1993-10-13 | AAP GmbH & Co. Betriebs KG | Medullar nail |
WO1998034555A1 (en) * | 1997-02-11 | 1998-08-13 | Orthomatrix, Inc. | Modular intramedullary fixation system and insertion instrumentation |
-
1998
- 1998-10-02 DE DE29818323U patent/DE29818323U1/en not_active Expired - Lifetime
-
1999
- 1999-10-01 WO PCT/DE1999/003254 patent/WO2000019925A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0250057A2 (en) * | 1986-06-20 | 1987-12-23 | DS-Chemie GmbH | Moulding mass |
WO1989007056A1 (en) * | 1988-01-29 | 1989-08-10 | Biomet, Inc. | Variable wall thickness interlocking intramedullary nail and method for making same |
FR2656212A1 (en) * | 1989-12-27 | 1991-06-28 | Hardy Jeanmarie | CENTRO-MEDALLIONAL ENCLOSURE SYSTEM FOR IMMOBILIZING A FRACTURE OF A BONE. |
EP0565216A2 (en) | 1992-04-10 | 1993-10-13 | AAP GmbH & Co. Betriebs KG | Medullar nail |
WO1998034555A1 (en) * | 1997-02-11 | 1998-08-13 | Orthomatrix, Inc. | Modular intramedullary fixation system and insertion instrumentation |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003063721A1 (en) | 2000-08-16 | 2003-08-07 | Align Technology, Inc. | Systems and methods for removing gingiva from teeth |
Also Published As
Publication number | Publication date |
---|---|
DE29818323U1 (en) | 1999-01-28 |
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