EP1725176A1 - Externer fixateur zur osteosynthese - Google Patents
Externer fixateur zur osteosyntheseInfo
- Publication number
- EP1725176A1 EP1725176A1 EP04719022A EP04719022A EP1725176A1 EP 1725176 A1 EP1725176 A1 EP 1725176A1 EP 04719022 A EP04719022 A EP 04719022A EP 04719022 A EP04719022 A EP 04719022A EP 1725176 A1 EP1725176 A1 EP 1725176A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- frame
- bone
- module
- fixator according
- 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.)
- Withdrawn
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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/66—Alignment, compression or distraction mechanisms
-
- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
-
- 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
-
- 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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/645—Devices extending alongside the bones to be positioned comprising a framework
Definitions
- the present invention relates to an external fixator for osteosynthesis according to the preamble of claim 1.
- Orthopedic corrections such as limb lengthening are nowadays carried out with so-called external fixators.
- the proximal end of a bone is connected through the skin by means of bone retention pins to an external (outside the body) frame, which takes on the mechanical loads that are normally borne by the bone during the lengthening process.
- the connection between the screws and the frame is realized with clamping jaws.
- the distal end of the bone is also connected through the skin to the frame with bone retention pins.
- the bone fixed in this way can then be separated by means of an osteotomy (saw cut) between the proximal and distal screws. All forces that are normally absorbed by the bone now go beyond the frame.
- the bone begins to form fibrous tissue in an effort to close the artificially created cleft.
- the extension can begin.
- the distal and proximal fragments are slowly pulled apart (approx. 1mm per day) and the tissue and bone grow with them.
- stop and the external fixator is left until the bone is consolidated and can take over all forces itself.
- Bone segments can be transported from one part of the bone to the other according to the same functional principle as with the extension to close a gap that e.g. B. has arisen from the removal of a tumor.
- the distal and proximal fragment are then held in their anatomically correct position by the frame. Additional bone retention pins are placed in between and the osteotomy is performed.
- the resulting middle segment is shifted without changing the overall length of the bone. The shift will stop when the gap is closed.
- the external frame has to be rigid in order to be able to transmit forces, and on the other hand it has to allow the fragments to move in a defined axis (parallel to the direction of extension). This movement must also be defined in time (e.g. 0.25 mm every six hours).
- telescopic structures Another disadvantage of telescopic structures is that the stability of the frame is adversely affected, so that telescopic structures generally have to be made comparatively solid in order to ensure reliable absorption of the load capacities.
- Arrangements are also known from the prior art which differ from the telescopic structure of a support rail.
- a device is known, the support rails of which each consist of two rigid support parts which are each connected to bone holding pins of a bone fragment, so that a relative longitudinal displacement of the bone fragments is possible.
- the second support part is designed as an auxiliary rail.
- the auxiliary splint can be moved on the main splint, whereby the relative movement of the bone fragments is achieved.
- This device too, must be kept relatively coarse and solid, since strong forces which have to be derived occur when the bone fragments move against one another.
- the object of the present invention is therefore to provide an external fixator for osteosynthesis which avoids the disadvantages mentioned. It should both be stable and reliably absorb the transmitted forces and be easy and simple to change in length. A comparatively simple structure is also sought.
- the fixator according to the invention has a frame with at least one rod, which absorbs the mechanical loads.
- Frame and Bones are connected via known connecting means, in particular bone holding pins. These connecting means are in turn connected to the frame via so-called clamping jaws. These jaws allow a detachable attachment and any arrangement and grouping on the frame.
- a module is provided which can be placed on the frame. With the module, a relative movement of two bone fragments can be brought about. It has at least two components. The first of the at least two components can be connected to the frame. The second of the two components is one with at least one clamping jaw
- the second component can be attached to the clamping jaw.
- the module also has a means with which the second component can be moved relative to the first component. A relative movement is thereby achieved. This has the effect that the bone fragment connected to the clamping jaw and thus to the second component can be moved via the clamping jaw to which the second component is connected.
- the present invention thus builds on a traditional frame with simple, non-telescopic elements. These simple rods are widely used and allow a modular construction of different frames.
- a preferred construction is the parallel arrangement of two rods, so that a double rail is created.
- the frame is aligned so that it points in the direction of displacement.
- Such a frame is provided with clamping jaws, to which the bone holding pins are fixed. The forces go over the immovable frame without mechanical feed units.
- the actual invention is an additional device, referred to herein as a module, which is preferably attached only temporarily in order to accomplish an extension increment and Can be removed at any time without having to remove the entire fixator.
- a time schedule for such an extension procedure can consist of a short extension time (approx. 2 minutes) and a long static time (approx. 6 hours).
- a short extension time approximately 2 minutes
- a long static time approximately 6 hours.
- all the jaws of the fixator are tightened and the module is ineffective and not mechanically loaded. Stability is guaranteed by the simple frame.
- the bone is brought into a relieved position.
- those jaws that hold the bone fragment to be transported are easily released so that they can be moved on the frame.
- the module attached according to the invention now enables a controlled displacement of the clamping jaws along the frame. This can be done by turning a handwheel.
- the displacement is effected in particular by a threaded spindle.
- the spindle can optionally also be rotated directly via a hexagon instead of the handwheel.
- the jaws After moving the jaws by a certain amount (e.g. 0.25 mm), the jaws are tightened again and the power flow goes directly to the frame regardless of the module.
- the module is not used during the static time period.
- the module can be dismantled and the frame remains alone on the bone until it is consolidated.
- module Due to the relatively weak mechanical load on the module, it can be built much more filigree than a conventional one Extension apparatus. It therefore makes sense to build the module very easily, for example from aluminum, so that it can also be left on the frame in the static time periods.
- the frame is preferably formed from at least two rods arranged in parallel.
- other arrangements are also conceivable and in principle it is possible to carry out a frame with only one rod.
- FIG. 1 shows a perspective view of an external fixator according to the invention
- FIG. 1 shows a perspective view of a fixator 1 according to the invention.
- the fixator 1 has a frame 2, in which two rods 3a, 3b are provided in the exemplary embodiment in FIG.
- a number of clamping jaws 4 are provided on the frame 2, more precisely on the bars 3a and 3b.
- 4 clamping jaws 4a, 4b, 4c, 4d and 4e, 4f, 4g, 4h are arranged in a group.
- Each jaw is connected to a connecting means, for example a bone holding pin.
- the bone retention pin is inserted into the bone.
- the clamping jaws enable the bone to be connected to the bars 3a, 3b and thus to the frame 2.
- the bone holding pins are omitted in the illustration in FIG. 1. Only the bore for a bone holding pin is shown, which is identified by way of example on the clamping jaw 4b with the reference number 14.
- a module 5 is provided.
- module 5 is shown schematically in FIG. 2.
- the module 5a is connected to the frame 2.
- the module 5 has a first component 6 and a second component 7.
- the first component 6 can be connected to the frame. This connection is particularly firm.
- the second component 7, however, is slidably connected to the frame. It is supported on the jaws 4, which are connected via the bone holding pins or another connecting means to the bone fragment to be displaced.
- first component 6a is also preferably connected to the clamping jaws 4e and 4g.
- the connection of the first component 6a and the second component 7a of the module 5a to the corresponding clamping jaws is preferably carried out with the aid of the same screws and nuts 9 with which the clamping jaws 4 are also fixed on the rod 3a, 3b. If a displacement of a bone fragment is now to be effected, the nuts 9a-d are loosened slightly, for example by half a turn or a full turn. As a result, the clamping jaws 4a-4d are displaceable on the rods 3a, 3b.
- the threaded rod 8a of the module 5a initially prevents this. It has a certain holding function, which proves to be very advantageous during the shift phase.
- the threaded rod 8a is now turned by turning the handwheel 15a.
- a hexagon 16a, 16b can also be provided, so that the rotary movement does not take place with the handwheel, but with an appropriate tool.
- a relative movement is generated by the rotation of the threaded spindle 8a, indicated by the arrow 10.
- the length of the displacement can be defined by the pitch of the threaded spindle.
- Revolution correspond to a distance of 1 mm, which is a common distance for a bone extension per day. It should be noted that the nuts 9e-9h are not loosened during the extension process. You stay firm.
- module 5b results in detail from the illustration in FIG.
- Both the first component and the second component have recesses 12a, 12b, 12c for engagement with one jaw 4 each.
- the two components 6b, 7b are placed on the jaws 4. Bores 11a, 11b, 11c are also provided, into which the screws of the clamping jaws 4 can be inserted.
- This design ensures that the first component 6b and the second component 7b fit snugly on the clamping jaws 4, as can be seen, for example, from the illustration in FIG. It is pointed out that in the illustration in FIGS. 1 and 2, the first component engages only two clamping jaws 4e and 4g, whereas the second component 7 engages four clamping jaws 4a, 4b, 4c, 4d.
- this design can be modified as desired without departing from the principle according to the invention.
- component 6 can also be moved differently in that component 7 is arranged in a fixed manner.
- the bone fragment can also be shifted in both directions if the component 6 is fixed.
- the direction of rotation on the spindle determines the direction of displacement.
- the module 5 according to the invention can consequently be placed independently of the desired direction of displacement of the bone fragment. It is therefore also characterized by universality.
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2004/000674 WO2005092220A1 (de) | 2004-03-10 | 2004-03-10 | Externer fixateur zur osteosynthese |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1725176A1 true EP1725176A1 (de) | 2006-11-29 |
Family
ID=34957100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04719022A Withdrawn EP1725176A1 (de) | 2004-03-10 | 2004-03-10 | Externer fixateur zur osteosynthese |
Country Status (9)
Country | Link |
---|---|
US (1) | US20070123858A1 (de) |
EP (1) | EP1725176A1 (de) |
JP (1) | JP4601664B2 (de) |
KR (1) | KR101190447B1 (de) |
CN (1) | CN100518679C (de) |
AU (1) | AU2004317510A1 (de) |
BR (1) | BRPI0418625B1 (de) |
CA (1) | CA2559497C (de) |
WO (1) | WO2005092220A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009100459A1 (en) * | 2008-02-08 | 2009-08-13 | Texas Scottish Rite Hospital For Children | External fixation strut |
US8083740B2 (en) * | 2008-09-28 | 2011-12-27 | Maryam Eslami | Device for facilitating the healing of bone including Olecranan |
CN101862217B (zh) * | 2009-04-18 | 2012-09-05 | 方玉树 | 双轨式外固定支架 |
US8282636B2 (en) | 2009-08-10 | 2012-10-09 | Imds Corporation | Orthopedic external fixator and method of use |
US8585703B2 (en) * | 2010-12-09 | 2013-11-19 | Stryker Trauma Sa | Adjustment tool for external fixator |
US9962188B2 (en) | 2013-10-29 | 2018-05-08 | Cardinal Health 247. Inc. | External fixation system and methods of use |
CN103829994B (zh) * | 2014-03-24 | 2016-02-03 | 曾行行 | 一种骨科小腿胫骨外固定支架 |
CN105686872B (zh) * | 2016-03-10 | 2019-02-05 | 成都新澳冠医疗器械有限公司 | 一种用于骨延长的桥接组合内固定系统 |
TWI561206B (en) * | 2016-04-01 | 2016-12-11 | E Da Hospital | A regulatable external fixator |
US11826077B2 (en) | 2020-03-23 | 2023-11-28 | Texas Scottish Rite Hospital For Children | External fixation strut |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2333033A (en) * | 1943-06-11 | 1943-10-26 | Leslie E Mraz | Bone splint |
CH579438A5 (de) * | 1974-05-22 | 1976-09-15 | Jaquet Henri | |
US4361144A (en) * | 1980-06-02 | 1982-11-30 | Slaetis Paer E V | External compression frame for stabilizing unstable pelvic fractures |
US4502473A (en) * | 1981-08-06 | 1985-03-05 | National Research Development Corp. | Apparatus for external fixation of bone fractures |
DE3611319A1 (de) | 1986-04-04 | 1987-10-15 | Witzel Ulrich | Fixateur externe zur osteosynthese |
US4747394A (en) * | 1986-10-08 | 1988-05-31 | Watanabe Orthopedic Systems, Inc. | Spinal retractor |
US4848368A (en) * | 1988-04-25 | 1989-07-18 | Kronner Richard F | Universal external fixation frame assembly |
JPH03501093A (ja) * | 1988-05-26 | 1991-03-14 | フセソユズニ クルガンスキ ナウチニ ツェントル “ボススタノビテルナヤ トラフマトロギア イ オルトペディア” | 骨接合用自動伸延装置 |
CH678485A5 (de) * | 1988-12-15 | 1991-09-30 | Jaquet Orthopedie | |
US5207676A (en) * | 1989-02-27 | 1993-05-04 | Jaquet Orthopedie S.A. | External fixator with controllable damping |
IT1262781B (it) * | 1993-03-15 | 1996-07-04 | Giovanni Faccioli | Attrezzo e metodo per la riduzione esterna di fratture |
GB9325698D0 (en) * | 1993-12-15 | 1994-02-16 | Richardson James B | Patient-operated orthopedic device |
US5620442A (en) * | 1995-05-12 | 1997-04-15 | Bailey; Kirk J. | Method and apparatus for external fixation of small bones |
IT1289103B1 (it) * | 1996-05-15 | 1998-09-25 | Orthofix Srl | Fissatore esterno compatto |
US6224594B1 (en) * | 1997-10-10 | 2001-05-01 | Rimlon Ltd. | Devices for passive motion of joints under traction |
DE19848715C1 (de) * | 1998-10-22 | 2000-08-24 | Aesculap Ag & Co Kg | Osteosynthetisches Haltesystem |
FR2836371A1 (fr) * | 2002-02-28 | 2003-08-29 | Eurosurgical | Connecteur pour dispositif d'ancrage vertebral par voie anterieure |
-
2004
- 2004-03-10 CA CA2559497A patent/CA2559497C/en not_active Expired - Fee Related
- 2004-03-10 JP JP2007502418A patent/JP4601664B2/ja not_active Expired - Fee Related
- 2004-03-10 BR BRPI0418625-7A patent/BRPI0418625B1/pt not_active IP Right Cessation
- 2004-03-10 KR KR1020067018125A patent/KR101190447B1/ko active IP Right Grant
- 2004-03-10 EP EP04719022A patent/EP1725176A1/de not_active Withdrawn
- 2004-03-10 WO PCT/IB2004/000674 patent/WO2005092220A1/de active Application Filing
- 2004-03-10 CN CNB2004800423566A patent/CN100518679C/zh not_active Expired - Fee Related
- 2004-03-10 AU AU2004317510A patent/AU2004317510A1/en not_active Abandoned
-
2006
- 2006-09-08 US US11/519,195 patent/US20070123858A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2005092220A1 * |
Also Published As
Publication number | Publication date |
---|---|
BRPI0418625A (pt) | 2007-05-29 |
CA2559497C (en) | 2013-05-14 |
US20070123858A1 (en) | 2007-05-31 |
CN1925802A (zh) | 2007-03-07 |
BRPI0418625B1 (pt) | 2015-05-05 |
CA2559497A1 (en) | 2005-10-06 |
KR20070031869A (ko) | 2007-03-20 |
JP2007528250A (ja) | 2007-10-11 |
AU2004317510A1 (en) | 2005-10-06 |
KR101190447B1 (ko) | 2012-10-11 |
JP4601664B2 (ja) | 2010-12-22 |
CN100518679C (zh) | 2009-07-29 |
WO2005092220A1 (de) | 2005-10-06 |
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Legal Events
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