WO1998014121A1 - Vorrichtung zum auffinden von verriegelungsbohrungen bei implantaten - Google Patents
Vorrichtung zum auffinden von verriegelungsbohrungen bei implantaten Download PDFInfo
- Publication number
- WO1998014121A1 WO1998014121A1 PCT/EP1997/005360 EP9705360W WO9814121A1 WO 1998014121 A1 WO1998014121 A1 WO 1998014121A1 EP 9705360 W EP9705360 W EP 9705360W WO 9814121 A1 WO9814121 A1 WO 9814121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- implant
- magnet device
- magnetic
- locking
- 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
- A61B17/16—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
- A61B17/16—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
- A61B17/1707—Guides or aligning means for drills, mills, pins or wires using electromagnetic effects, e.g. with magnet and external sensors
Definitions
- the invention relates to a device for locating locking bores in implants, in particular for locating transverse bores in intramedullary locking nails.
- implants are often fixed with locking pins inserted transversely to the expected pressure or tensile load.
- a hollow or compact metal nail as an implant is driven longitudinally into the medullary cavity of the bone to stabilize the bone and locked with pin-shaped elements running transversely to it. This lock fixes the fracture in the correct position and ensures the correct length of the bone.
- the most common method currently used is to find the hole using X-rays and an image converter. You manipulate it until the hole of the nail on the screen has a round shape and then a sharp instrument (awl) is guided from the outside to the bone wall (cortex) with the tip exactly in the center of the hole. Then you switch off the image converter, perforate the cortex with the awl and then drill with a drill through the nail to the opposite bone wall and then screw in the locking screw.
- awl sharp instrument
- This method is also unsatisfactory because it is associated with a high exposure to X-rays for the patient and the surgical team. This method is particularly problematic for the surgical team, since such operations are often repeated several times a day, with the result that the radiation levels accumulate.
- a measuring head with a magnetic field measuring device which preferably consists of two Hall elements, is inserted into the hollow implant nail. These are connected to a processing and display unit via a line running in the implant nail.
- the magnetic field of an externally applied electric or permanent magnet which preferably has a ring shape, is measured.
- the invention has for its object to provide a device for locating locking holes in implants, with which the transverse hole can be found easily and precisely, without exposing the patient and the surgical team to radiation exposure and without complex measuring equipment, in certain embodiments even without electricity or only battery power is sufficient.
- a device for locating locking bores in implants in particular for locating transverse bores in intramedullary locking nails, and for coaxially aligning a drilling device with these transverse bores, which is characterized in that an axially symmetrical one introduced into the transverse bore of the implant Magnetic field generating first magnet device and a second magnet device are provided outside the implant, the magnet of the second magnet device located outside the implant being arranged so as to be movable in its alignment with the magnetic field generated by the first magnet device.
- a magnetic device that generates an axially symmetrical magnetic field is arranged in the transverse bore of the implant.
- a further magnetic device is provided outside the implant and is preferably movably arranged on a holder.
- the magnet of the second magnet device can thereby align itself freely in the magnetic field of the non-movable first magnet device.
- the position of the first magnet device and thus the position of the locking bore can therefore be determined from the position of the magnet of the second magnet device.
- the two magnet devices can each contain either a permanent magnet or an electromagnet, for example.
- all other components of the device, apart from the implant are preferably made of non-magnetizable material.
- the bone To insert the locking pins, the bone must be drilled out in line with the locking hole. This requires a drilling device with which the cortex can be pierced on both sides of the locking hole.
- a preferred further development of the invention therefore provides that the holder of the second magnetic device located outside the implant can also accommodate the drilling device. First, the magnetic device is arranged in the holder. The position of the bracket is then changed until the exact position of the locking hole is determined. The second magnetic device is then removed from the holder and instead the drilling device is inserted, which is then in the correct position in order to pierce the cortex in front of the locking hole.
- a sleeve which serves as a guide sleeve, is preferably provided in the holder.
- either the second magnet device or the drilling device can be inserted into this sleeve.
- the guide sleeve After the first incision, the guide sleeve is placed through the hole created on the outer cortex. After precise determination of the position of the locking hole by positioning the second magnet device, after fixing the guide sleeve and the holder, it is removed from the guide sleeve and the drilling device is inserted into the guide sleeve.
- the drilling device is preferably designed in such a way that it can be prevented from penetrating too deeply, for example by means of a short drill and with the rest lying on the outer cortex at right angles to the drilling direction Edge. An adjustable spacer with scaling is also possible.
- the magnet of the second magnet device is preferably gimbaled via a rod or on a ball joint. It is then freely movable in space in its relative position and can align itself according to the magnetic field of the first magnet device. So that the force of gravity has no influence on the position of the magnet of the magnet device and thus on the determination of the position of the locking hole, the rod to which the magnet is attached is preferably suspended in a balanced manner.
- the side of the second magnet device facing away from the first magnet device is designed as a display device.
- the magnet of the second magnet device changes its relative position in space when it is moved towards the first magnet device, only if it is not moved along the axis of the first magnet device.
- the display device can therefore indicate when the magnet of the second magnet device changes its position.
- This display is to be carried out in a manner known per se and can be, for example, optical, acoustic, electrical or electronic.
- the display device can also be attached on the side facing the first magnet device.
- This display can be acoustic, electrical, optical or be of electronic type and indicates the central alignment of the magnet in the sleeve of the second magnet device.
- a target device is to be understood as an attachment which can be attached to the bone nail at the exposed end of the implant, ie in a device for finding transverse bends at the distal end at the end opposite the distal end of the bone nail.
- the aiming device has an arm which extends essentially parallel to the bone nail and on which the holder of the second magnet device is guided.
- the holder of the second magnetic device fastened to the aiming device is fastened to the aiming device in such a way that it can be adjusted on the arm of the aiming device both in the longitudinal direction of the implant and in a circular plane orthogonal thereto.
- another embodiment of the second magnet device is movably attached to a closed or almost closed circular ring rail that is movably attached in the longitudinal direction of the target device.
- a second rail is attached in the inner circle of the ring rail, which can be moved with little friction on the inside of the outer rail and covers over 180 ° of the inner circle of the ring rail.
- Oppositely polarized magnets are attached to the opposite sides of the inner rail (180 °), which are oriented in the field of the first magnet device.
- taring weights are attached to the ends of the inner rail, which balance the inner rail, or the thickness and shape of the rail in the sections accordingly chosen so that the position of the magnets of the inner rail is not affected by gravity. This makes it possible to carry out a rough preliminary orientation with regard to the position of the transverse bore.
- Another preferred embodiment of the target device provides for scaling both on the arm of the longitudinal rail and on the circular ring rail and the attachment of the holder. Knowing the coordinates that can be read from it makes it much easier to remove the locking bolts later when removing the implant.
- the first magnetic device located in the implant has a diameter that is smaller than or at most the same size as the diameter of the transverse bore in the implant.
- the first magnet device can then be easily removed from the transverse bore when the cortex is pierced on the side facing the second magnet device.
- the embodiments described below are suitable for introducing the first magnet device into the locking bore.
- the first magnet device can, for example, be introduced into a socket surrounding the locking bore with a thread, the socket preferably consisting of elastic, resorbable but sufficiently deformation-resistant material.
- the first magnet device can easily be screwed out of the locking hole through the first hole in the outer cortex, preferably into a thread that has the same thread, optionally locked and fitting into the guide sleeve, which is placed through the bore of the cortex on the implant.
- the opposite side of the cortex can then be pierced and the locking pin inserted.
- the first magnet device can also be introduced into a smooth socket surrounding the locking bore, the socket preferably consisting of elastic, resorbable but sufficiently deformation-resistant material.
- the first magnet device can easily be pulled out of the locking hole by means of a pull magnet, preferably into a possibly locked sleeve that fits into the guide sleeve and is placed on the implant through the hole in the cortex.
- the opposite side of the cortex can then also be pierced and the locking pin inserted.
- the core of the first magnet device is drilled through and thus allows removal by means of a wire inserted through the hole and then locked. It would also be possible to design the first magnet device with an eyelet on the side facing the second magnet device, through which the hook can remove the first magnet device through the guide sleeve on the second magnet device, which can also accommodate the drilling device.
- a further sleeve, which is placed on the implant through the bore of the cortex and fits into the guide sleeve, is preferably also used here.
- Another embodiment of the device according to the invention enables removal or removal from the transverse bore of the first magnet device through or into the hollow interior of the implant, in which the first magnet device is arranged to be displaceable or deformable.
- a first magnetic device consisting of two electromagnets coupled to one another can also be selected, in which a hollow, soft iron core is attached in a ring shape around each of the two openings in the transverse bore, around which the coils are wound.
- the locking hole itself remains just as free as the inner cavity of the implant. The need to remove the magnetic device for inserting the locking pins is eliminated.
- each implant is attached with several locking pins.
- several devices according to the invention can also be used simultaneously to find several locking holes. It depends on the individual case whether the first magnetic devices should be polarized in the same or opposite directions. Both variants are conceivable. Electromagnets that can be operated individually are preferably used for the first magnet devices. In this way, a crosswise influencing of the second magnetic devices by the further first magnetic devices is to be avoided.
- permanent magnets for the first magnet device can also be used if there is sufficient spacing between the transverse bores to use.
- the second magnet device for the rough alignment must be varied such that two magnets of opposite polarity, which are rigidly connected to one another at a fixed angle, are used instead of a magnet. When the bisector between the magnets is in a vertical position, the position of both holes can be determined.
- the transverse bore holes are only a short distance from one another, it can be assumed that the relative stability of the implants means that they are not or not significantly twisted against one another. Therefore, after finding a transverse bore marked by a first magnetic device, the other holes can be localized without difficulty using a mechanical target gauge.
- FIG. 1 shows a cross-section of a tubular bone fixed with a bone nail and locking screws.
- Fig. 2 shows schematically the application of the device according to the invention at the distal end of a bone nail inserted into a long bone.
- 3 shows the detail of a bone nail with two locking bores and first magnetic devices arranged therein.
- FIG. 4 shows a nailed tubular bone with a target device for locating the distal locking holes and then piercing the cortex.
- FIG. 5 shows a cross section through a nailed thigh with a target device with a circular ring rail and an inner rail.
- 6a shows the second magnet device with a side which is designed as a display device and faces away from the first magnet device.
- 6b shows a further embodiment of the second magnet alignment with a side facing away from the first magnet device designed as a display device.
- 6c shows a further embodiment of the second magnetic alignment with one of the first designed as a display device
- FIG. 8 shows the second magnet device with a display device on the side facing the first magnet device.
- 9 shows the second magnet device in an embodiment with two magnets coupled via a rigid angle.
- a tubular bone 3 can be seen, which was fixed with a bone nail 4.
- the bone nail 4 is driven into the medullary cavity of the bone.
- One or more locking pins or screws are provided at the distal end for the final fixation and fixing of the length of the bone.
- two screws 5 are provided for this purpose. It is clear that the exact position of the locking holes 6 after driving in the bone nail 4 is difficult to determine.
- the screw holes 6 for the locking screws 5 must be drilled from the outside so that the screws can be screwed in. In order that the bone nail 4 fixes the bone 3 exactly and the bone is no longer weakened as absolutely necessary, an exact determination of the holes is absolutely necessary.
- FIG. 2 the application of the device according to the invention is shown schematically.
- a bone nail 4 is inserted into the distal end of a tubular bone 3 shown.
- the further procedure is only described using a locking hole 6.
- a magnet device 1 is located in the locking hole 6. This generates an axially symmetrical magnetic field, which is also shown.
- the magnet of the second magnet device 2 shown here in different positions — is movable in its orientation outside the implant 4 arranged on the magnetic field generated by the first magnetic device 1. By moving the magnet of the second magnet device 2 in the magnetic field of the first magnet device 1, the position of the second magnet device 2 is determined in which it is exactly in the axis of the first magnet device 1. Then it is precisely aligned with the locking hole 6 in the bone nail 4.
- FIG. 3 shows the detail of a distal end of a bone nail 4 with two different possibilities for fastening the magnetic device 1 in the bone nail 4.
- all locking bores 6 within a bone nail will generally be equipped with a magnetic device 1 in the same way.
- two variants are to be explained in one illustration.
- a smooth socket 7 surrounding the locking hole 6 is shown, the socket 7 preferably consisting of elastic, resorbable but sufficiently deformation-resistant material.
- the magnetic device can be easily and preferably with a pull magnet that attracts the magnet device, preferably into a possibly locked sleeve 33 which fits into the guide sleeve and which is placed on the implant through the hole in the cortex , be removed.
- the variant shown on the right in the figure shows a socket 8 surrounding the locking bore 6 with a thread, the socket 8 preferably being made of elastic, resorbable but sufficiently deformation-resistant material.
- this magnetic device can be screwed out of the bone nail 4, preferably into an identical one Threaded, optionally locked and fitting into the guide sleeve 34, which is placed through the bore of the cortex on the implant.
- a locking screw can then be screwed in instead of the magnetic device.
- a target device 9 can also serve to simplify the finding of the locking bores 6.
- the target device 9 is attached to one end of the bone nail 4. It has an arm 10 which runs essentially parallel to the bone nail 4. On this arm 10, which is provided with a scale, an annular ring rail 14 oriented orthogonally to the bone and provided with a scale is movably arranged on a carriage 16.
- the holder 1 1 is movable both in the longitudinal direction of the implant and on the ring rail 14 in a circular plane and on the attachment 12.
- the second magnet device 2 is moved in its holder 11 on the arm 10 or the circular ring rail 14 and on the angle-scaled attachment 12 until the orientation of its magnet matches that of the locking hole to be found.
- a display device on the side of the second magnet device 2 facing away from the bone nail 4 is used.
- the bracket 1 1 is then first fixed in this position and the coordinates read.
- an incision is made down to the bone.
- the guide sleeve 13 fastened to the holder 11 is then lowered onto the bone in the direction of the first localization through the incision opening.
- the second magnet device 2 is inserted into the sleeve 1 3, and with it the exact position of the bore 6 is determined.
- the sleeve 1 3 and holder 1 1 are fixed and the coordinates are read again.
- the second Magnet device 2 can be removed and instead a drilling device, not shown, can be inserted into the holder.
- the cortex is then drilled through with the drilling device inserted into the sleeve 13, a spacer 15 attached to the sleeve preventing the drill from penetrating too deeply.
- the first magnet device 1 is then removed from the bone nail 4. This can be done by a pull magnet in its own sleeve, which is also in the sleeve
- FIG. 5 shows a cross section through a femur with a target device according to the invention.
- a movable carriage 16 is attached to an arm 10 provided with a scaling, on which a circular ring rail 14 oriented orthogonally to the bone and provided with a scaling is fastened.
- a holder 1 1 via an angle-scaled attachment 12, consisting of a slide and a ball joint, fully movable but securely lockable.
- a sleeve 1 3 is fixed, in which a second magnet device 2 can be used.
- an inner rail 17 is attached with low friction and movability, which covers over 180 ° of the inner circle.
- oppositely polarized magnets 18, 19 are attached, which are exactly 180 ° opposite each other on the circle described by the ring rail 14.
- tare weights 37 are attached, which balance the inner rail 1 7, so that the position of the magnets 18, 19 of the inner rail 1 7 is not influenced by gravity.
- FIG. 6a shows the second magnet device with a side which is designed as a display device and faces away from the first magnet device.
- an inner sleeve 20 there is an axis 21 attached to the sleeve wall, in the middle of which a ball joint or a gimbal 22 is attached.
- a rod 23 is connected to the axis 21 via the ball joint 22.
- a magnet 24 is fastened to the rod 23 on the side facing the first magnet device.
- This side of the inner sleeve 20 is closed with a membrane 25.
- a buoyancy weight 29 and an optically clearly visible attachment 26, which in the example is designed in a ring shape, are attached.
- FIG. 6b shows the second magnet device in an embodiment which has been changed in details compared to FIG. 6a. So here the connection between axis 21 and rod 23 is designed as a gimbal 22. Furthermore, a point contact 35 is attached to the end plate 44, which can be designed as 27 in the example above. The upper end of the rod on the side facing away from the first magnet device is designed here as contact 38. When contact is made between 35 and 38, a signal is transmitted via line 39 to display 39.
- FIG. 6c shows the second magnet device in an embodiment which has been changed in details compared to FIG. 6a.
- the inner sleeve 20 is extended beyond the glass plate with cross hair 27 and contains an optical lens 43 as a termination of the magnetic device on the side facing away from the first magnetic device.
- FIG. 7 shows the second magnet device with a reading device between the magnet and ball joint.
- an inner sleeve 20 there is an axis 21 fastened in the sleeve wall, in the middle of which a ball joint or a gimbal 22 is attached.
- a rod 23 is connected to the axis 21 via the ball joint 22.
- a magnet 24 is fastened to the rod 23 on the side facing the first magnet device.
- This side of the inner sleeve 20 is closed with a membrane 25.
- an optically clearly visible attachment 26 which in the example is of a ring-shaped design, is attached to the rod 23.
- the side of the inner sleeve 20 facing away from the first magnet device is closed with a glass plate 27 on which a crosshair is applied.
- An annular light source 28 can be mounted in the inner sleeve below the glass plate;
- the illumination of the target device can advantageously also take place in front of the surgeon's eye via an illuminated lens known in medicine.
- the advantage of this exemplary embodiment is a greater deflectability of the second magnet device.
- FIG. 8 shows the second magnet device with a display device on the side facing the first magnet device.
- an inner sleeve 20 there is an axis 21 attached to the sleeve wall, in the middle of which a ball joint 22 is attached.
- a rod 23 is connected to the axis 21 via the ball joint 22.
- a magnet 24 is fastened to the rod 23 on the side facing the first magnet device.
- This side of the inner sleeve 20 is closed with a membrane 25.
- a point contact 35 is attached to the membrane.
- a contact tip 36 is formed on the magnet 24.
- When contacts 35 and 36 are touched, a signal of an acoustic, optical, electrical or electronic type is triggered, which reaches line 39 to display 39a.
- the two sides of the rod 23 with the devices attached to them are balanced against each other by a buoyancy weight 29.
- the inner sleeve 20 is closed on the side facing away from the first magnet device with an end plate 44, which can be designed like the plate 27.
- FIG. 9 shows a second magnet device as described in FIGS. 6, 7 and 8 in an embodiment with two magnets coupled via a rigid angle.
- This exemplary embodiment can be used if permanent magnets are used for the first magnet device with a sufficient spacing of the transverse bores.
- a rigid angle 30 is attached to the rod 23, at the ends of which two magnets 31, 32 with opposite polarity are attached. These align in the magnetic field of the oppositely polarized first magnetic devices 1, 1 '.
- the signs + and - show the polarity of the magnets, the broken lines the magnetic field lines.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97912086A EP0930846A1 (de) | 1996-09-30 | 1997-09-30 | Vorrichtung zum auffinden von verriegelungsbohrungen bei implantaten |
AU49423/97A AU4942397A (en) | 1996-09-30 | 1997-09-30 | System for locating locking perforations in implants |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19640474.6 | 1996-09-30 | ||
DE1996140474 DE19640474A1 (de) | 1996-09-30 | 1996-09-30 | Vorrichtung zum Auffinden von Verriegelungsbohrungen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998014121A1 true WO1998014121A1 (de) | 1998-04-09 |
Family
ID=7807557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/005360 WO1998014121A1 (de) | 1996-09-30 | 1997-09-30 | Vorrichtung zum auffinden von verriegelungsbohrungen bei implantaten |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0930846A1 (de) |
AU (1) | AU4942397A (de) |
DE (1) | DE19640474A1 (de) |
WO (1) | WO1998014121A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT504341B1 (de) * | 2006-10-17 | 2008-05-15 | Eva Dr Ruprechter | Verfahren zum auffinden von löchern in implantaten sowie vorrichtung |
US8628538B2 (en) | 2009-10-28 | 2014-01-14 | Chirmat Sa | Device for positioning and adjusting a viewing axis |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19812129B4 (de) * | 1998-03-19 | 2005-03-17 | Matthias Wolter | Vorrichtung zum Auffinden von Verriegelungsbohrungen |
AU7940900A (en) * | 1999-11-10 | 2001-06-06 | Eeg, Ltd. | Method for locating holes in orthopaedic devices |
DE20314742U1 (de) | 2003-09-24 | 2003-12-04 | Stryker Trauma Gmbh | Zielgerät für einen Verriegelungsnagel sowie Verriegelungsnagel |
WO2009109371A2 (en) * | 2008-03-04 | 2009-09-11 | Sector 6 Technologies S.A. | Device for targeting locking holes in intramedullary nails |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3332642A1 (de) * | 1983-09-09 | 1985-04-04 | Ortopedia Gmbh, 2300 Kiel | Vorrichtung zum auffinden von querbohrungen intramedullaerer implantate |
EP0273872A1 (de) * | 1986-12-02 | 1988-07-06 | G. CREMASCOLI S.p.A. | Intramedullärnagel und Nagelgerät |
US5049151A (en) * | 1989-12-20 | 1991-09-17 | Durham Alfred A | Magnetic positioner arrangement for locking screws for orthopedic hardward |
US5127913A (en) * | 1991-04-22 | 1992-07-07 | Thomas Jr Charles B | Apparatus and method for implanting an intramedullary rod |
EP0589592A2 (de) * | 1992-09-22 | 1994-03-30 | ORTHOFIX S.r.l. | Zentrierungsmittel für Löcher von Marknägeln |
DE4344470A1 (de) | 1993-12-22 | 1995-06-29 | Effner Biomet Gmbh | Vorrichtung zum Auffinden der Querbohrung bei einem in einen Röhrenknochen eingebrachten hohlen Verriegelungsnagel |
US5514145A (en) * | 1994-05-04 | 1996-05-07 | Durham; Alfred A. | Magnetic positioner arrangement for locking screws for orthopedic hardware |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1265088B1 (it) * | 1993-05-20 | 1996-10-30 | Maurizio Luigi Valsecchi | Dispositivo magnetico per la individuazione della posizione e direzione dell'asse di forature ossee nelle tecniche di inchiodamento |
-
1996
- 1996-09-30 DE DE1996140474 patent/DE19640474A1/de not_active Withdrawn
-
1997
- 1997-09-30 WO PCT/EP1997/005360 patent/WO1998014121A1/de not_active Application Discontinuation
- 1997-09-30 AU AU49423/97A patent/AU4942397A/en not_active Abandoned
- 1997-09-30 EP EP97912086A patent/EP0930846A1/de not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3332642A1 (de) * | 1983-09-09 | 1985-04-04 | Ortopedia Gmbh, 2300 Kiel | Vorrichtung zum auffinden von querbohrungen intramedullaerer implantate |
DE3332642C2 (de) | 1983-09-09 | 1988-06-16 | Ortopedia Gmbh, 2300 Kiel, De | |
EP0273872A1 (de) * | 1986-12-02 | 1988-07-06 | G. CREMASCOLI S.p.A. | Intramedullärnagel und Nagelgerät |
US5049151A (en) * | 1989-12-20 | 1991-09-17 | Durham Alfred A | Magnetic positioner arrangement for locking screws for orthopedic hardward |
US5127913A (en) * | 1991-04-22 | 1992-07-07 | Thomas Jr Charles B | Apparatus and method for implanting an intramedullary rod |
EP0589592A2 (de) * | 1992-09-22 | 1994-03-30 | ORTHOFIX S.r.l. | Zentrierungsmittel für Löcher von Marknägeln |
DE4344470A1 (de) | 1993-12-22 | 1995-06-29 | Effner Biomet Gmbh | Vorrichtung zum Auffinden der Querbohrung bei einem in einen Röhrenknochen eingebrachten hohlen Verriegelungsnagel |
US5514145A (en) * | 1994-05-04 | 1996-05-07 | Durham; Alfred A. | Magnetic positioner arrangement for locking screws for orthopedic hardware |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT504341B1 (de) * | 2006-10-17 | 2008-05-15 | Eva Dr Ruprechter | Verfahren zum auffinden von löchern in implantaten sowie vorrichtung |
US8628538B2 (en) | 2009-10-28 | 2014-01-14 | Chirmat Sa | Device for positioning and adjusting a viewing axis |
Also Published As
Publication number | Publication date |
---|---|
AU4942397A (en) | 1998-04-24 |
EP0930846A1 (de) | 1999-07-28 |
DE19640474A1 (de) | 1998-04-09 |
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