WO2001010317A1 - Sistema de fijacion intervertebral para tratamientos de columna - Google Patents
Sistema de fijacion intervertebral para tratamientos de columna Download PDFInfo
- Publication number
- WO2001010317A1 WO2001010317A1 PCT/ES2000/000310 ES0000310W WO0110317A1 WO 2001010317 A1 WO2001010317 A1 WO 2001010317A1 ES 0000310 W ES0000310 W ES 0000310W WO 0110317 A1 WO0110317 A1 WO 0110317A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- head
- bar
- bowl
- tulip
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7041—Screws or hooks combined with longitudinal elements which do not contact vertebrae with single longitudinal rod offset laterally from single row of screws or hooks
Definitions
- the invention is applicable in the field of medicine and, specifically, in the field of bone surgery, making it possible to make fixed, mobile or connector plate fixations interchangeably that laterally displaces the rod fixation zone with respect to the area of the screw.
- One of the systems used for the immobilization of two or more bones consists in implanting in the same pedicle nails, each equipped with a head provided with means to fix thereto a bar that acts as a bridge between the different nails, so that at each of said nails being rigidly attached to the common bar, the respective bones are correspondingly immobilized.
- the bar is arranged perpendicularly to the screw, immovably, in the second case between the bar and the screw a label joint is established that allows to vary the orientation of the bar with respect to the screw, and in the third type bar and screw are related by an intermediate plate, which. the distance in a lateral direction, allowing a sharp offset between the elements repeatedly cited.
- the intervertebral fixation system that the invention proposes, usable with slight modifications in both fixed and mobile fixings and in systems provided with a connector plate, solves in a completely satisfactory way the problem previously exposed, in the two aspects mentioned, allowing the screw implantation it is carried out with physical independence from the rest of the pieces that participate in it, that is to say in the absence of the means for fixing the screw head nail of the bar of relationship between screws, which means that the implantation of the same can be carried out in optimal conditions, both from the point of view of manipulation and from the point of view of vision.
- the nail that participates in the system that is recommended, in its version corresponding to the fixed and mobile systems is structured by means of the functional combination of: a screw with a spherical head Ü7 ° ra ⁇ .er-te cant in the upper part, intended to be inserted into the bone; a tulip capable of receiving the screw head in its bosom, equipped with wide recesses for seating the bar and a strangulated mouth, with a trunk-conical configuration, which allows the screw head to pass, causing the latter to retain with the collaboration of an open washer, which is strangled by being axially pressed on the aforementioned trunk-conical mouth; an axial acting bowl on the said open washer and which is pressed in this direction by the bar itself, a second support and pressure bowl on the opposite area of said bar, and finally a screw cap, which is coupled to the mouth of the tulip and that is through which the final fixation and tightening of the set is made.
- Said cap is provided in its
- the screw head has an axial, blind and polygonal hole, which allows its implantation in the bone with the collaboration of an "Alien" key, prior to the implantation of the rest of the mechanisms of the nail
- the bowl of incidence on the open washer can incorporate in its bottom a prismatic-polygonal lug, coupling in the blind hole of the head, when it is a fixed system, or said bowl may present a semi-spherical internal surface, to establish a label coupling on the screw head.
- the plate in question will incorporate a housing similar to that of the tulip, substantially shorter and devoid of recesses, in which case it will exclusively receive the throttle bowl of the open washer, which will be threaded, while the bowl itself will be fixed to the other end of the connector plate, receiving within it a pseudomorse cone usable as a means of fixing to the connector plate and as a seat for the bar, which will be definitively fixed with the collaboration of a second bowl and a screw cap, as in the previous case.
- Said pseudomorse cone is extended in a short cylindrical neck and threaded of implantation in the connector plate, which after said implantation is fixed by means of a pin remaining integral with the plate.
- a cross-bar interconnection device collaborates, consisting of a piece provided with a laterally open recess, formally and dimensionally suitable for the implantation within one of the bars to be joined, recessed that intersects with a transverse hole of the piece itself, torn and intended for the implantation of the second bar, said piece also incorporating a threaded hole, which opens perpendicularly from the outside to said transverse hole and which is intended to receive a clamp plug with which press one bar against another, after selecting the relative position between them.
- the implantation of the screw is extremely easy and comfortable, with a perfect vision for the doctor of the work area, which also ensures an optimal structural rigidity for the whole, that is, a perfect immobilization of the rod with respect to the screw, without risk of unwanted movements of the bone elements to be joined, with minimal effort by the doctor, with a minimum intervention time, with the possibility in addition to conveniently stiffening the bars that participate in the system, after the proper positioning of them, and all this with the particularity that the multiple pieces that participate in the system, to achieve the fixation of the different elements, are provided to the doctor in a pre-assembly situation, that is to say conveniently related to each other, so that the latter must only carry out the tightening operations after the proper positioning or orientation of each of them.
- the open washer that is axially pressed on the trunk-conical mouth of the tulip is dispensed with, in which case the axial actuating bowl on the washer has its lower part with a conical shape and sectioned into segments that are they can deform in the tightening to allow the spherical head of the screw to pass in advance and then perform the classic "clip" of clamping and clamping of such head, this subject being integral to the system.
- a complement is provided that allows the fixation of the corresponding bar that relates C sacral n to the vertebra or lumbar vertebrae, in the absence of the slightest tension.
- the fixation to the sacrum bone is based on the use of a template that, once the bar is fixed to the lumbar area of the spine, allows to establish the exact point at which the screw should be implanted, as well as the orientation of the same, although the angulation of the sacrum screws does not have to be exact since it must adapt to the head of the screw to form a kneecap.
- a connecting plate of angular configuration is used, suitably shaped to absorb the angle formed by the column in the area of attachment of the sacrum to the lumbar vertebrae, said connector plate counting in one of its ends with a transverse hole for coupling of the fixing bar to the column, hole with its indented interior to facilitate the grip on said bar and which intersects with a threaded hole for implantation of a tightening screw, preferably with a head type "Alien", while at the other end of the connector plate the fixing means to the screw head are established.
- Figure 2. Shows the same set of the previous figure duly assembled and cross-sectioned.
- Figures 3 and 4.- They show representations similar to those of figures 1 and 2, but corresponding to the realization of the mobile system.
- Figure 7 shows a side elevational view of the device provided for cross-bar joint, which also participates in the system of the invention.
- Figure 8. Shows a cross-sectional detail of the device of the previous figure, according to the cutting line A-B of said figure.
- Figure 9. Shows the finally assembled cross-linking device, together with the element that holds all the components together, which is independently represented in perspective.
- Figure 10. It shows a view in side elevation and in section of the connecting plate that participates ⁇ n the fixation system to the sacral bone, on the crue the screw head is attached and the bar that bridges and stiffens the sacrum with another or other vertebrae in the spine.
- Figure 11.- Shows a plan view of the said connector plate shown in the previous figure, in this case devoid of the fixing screw to the sacrum and the bar, even of the latter tightening screw.
- Figure 12. Shows a side elevational view of the pressing and holding bowl of the screw head, in an embodiment variant for mobile system.
- Figure 13.- Shows a sectional side elevation view of the bowl of the previous figure for fixed system.
- Figure 14.- Shows the assembly of the bowl of Figure 12 on the corresponding tulip that is part of the system object of the invention.
- head (2) of the rnil h or (1) is adapted to engage a tulip (4) provided at its proximal end with respect to the screw a frustoconical orifice (5), but determining such throttling hole ( 6) which allows the screw head (2) to pass through, said tulip also incorporating wide recesses (7), diametrically aligned, which allow the implantation of the bar (8) that constitutes the true link between vertebrae, as well as of an internal thread (9) in the area that frames these recesses (7).
- the tulip (4) is intended to receive an open washer (10) inside it, whose diameter, in a distended position, approximates the internal diameter of the lower section of the tulip (4), intended to be strangled radially over the lower area of the head (2) of the screw (1), by the axial displacement of a bowl (11), basically cylindrical as well as the tulip (4) , provided with a circumferential front of support on the washer (10), equipped with an axial pin (12), emerging from its bottom, attachable in the blind hole (3) of the head (2) of the screw and through which these elements are immobilized and equipped with an upper bed (13) for seating the bar (8).
- the bed (13) of the bowl (11) is intended to receive the support of the rod (8), and the axial pressure that, through a second bowl
- the plate when r.ra or e is provided with a connector plate (21), the plate will be provided with a housing (22) similar to that of the lower sector of the tulip (4) of the previous cases, with the same trunk-conically strangled mouth (5) and also provided with a thread (23), for coupling a bowl (11 "), also similar to the bowl (11) of the system fixed, with the same axial stud
- the connector plate (21) establishes a threaded hole (24) for fixing it to the tulip (4 "), which in this case configures a lower housing (25) for a pseudomorse cone (26), with a trunk-conical sector (27) and a threaded neck (28), between which a throat (29) is intended for immobilization of the pseudomorse cone (26) in order to ensure that when pressed by the bar will form a whole rigid body, which is supplied to the doctor conveniently coupled to the tulip (4 "), with the free end of its neck (28) riveted to prevent its decoupling of said tulip, but with a certain mobility to be able to conveniently orient the bar (8), the doctor making the final fixation with the collaboration of a captive screw (62) that plays in a side hole (61) of the plate (21), open towards the hole (24), intended to act on said throat (29), and more specifically to block or permanently immobilize the tulip (4 ") with respect cto the plate (21),
- the cross-bar joint device shown in Figures 7 and 8 participates in the system, materialized in a part (30) provided with a recess or housing (31) open laterally, concave configuration, approximately in "C", for coupling and settlement of one of the bars (8) to be joined, crossing this recess (31) with a transverse hole (32), torn in the same direction as said recessed (31) and intended for reception of the second bar (8 '), making the final fixation or blocking between both bars, after their proper relative positioning, with the collaboration of a threaded plug (33) that fits into a hole (34) also threaded the piece (30) and that presses the bar (8 ') against the bar (8).
- Figure 9 shows the cross-mounted device between bars finally assembled, which involves a cap (37) that is formally and dimensionally capable of attaching to the top of the piece (30), in order to prevent this piece separates from the bar (8 ') and retains the screw cap (33), so that the cross-linking device remains mounted before or after its installation with respect to the bars (8), which is considerably facilitated its manipulation
- the cap (37) has in its upper base a hole (3. 8) through which gives accepo to the plug (33 ⁇ oar? "Ue it can be threaded and respective holes (39) and (39 ') for the passage of the bar (8') through and through the transverse hole (32).
- the cap (37) holds together the piece (30), bar (8 ') and the screw cap ( 33), since the bar (8 ') is prevented from moving when inserted through said holes, while the cap (37) retains the threaded plug (33) inside it, but allows its axial displacement relative to the hole (34) so that it can exert or relieve pressure on the bar (8).
- the hole (47) for implantation and fixation of the bar (48) that connects the connecting plate connected to the sacrum with the adjacent area of the column has its internal surface provided with grooves (58) in turn destined to boost grip on said bar, specifically when it is pressed into its housing by a screw (59), preferably "Alien” type, which threads into a hole (60) of the sector (44) of the connector plate (40), which opens perpendicularly towards the hole (47) for implanting said bar.
- a variant embodiment of the bowl (11) or (11 ') is shown in Figures 12, 13 and 14, when the open washer (10) is dispensed with in the system.
- the assembly is delivered assembled, so that for its disassembly, special tweezers will be necessary, first of all the assembly must be untied and through the groove of the Tulip (4) through which the bowl slightly appears, taking advantage of the threads, the special clamp will be nailed, preventing the bowl from moving and driving the screw, to allow the screw to exit.
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (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)
- Prostheses (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU64447/00A AU6444700A (en) | 1999-08-05 | 2000-08-04 | Intervertebral fixing system used in treatments of the spinal column |
DE60020131T DE60020131D1 (de) | 1999-08-05 | 2000-08-04 | Intervertebrales fixierungssystem zur verwendung bei der behandlung des rückgrates |
AT00951549T ATE295126T1 (de) | 1999-08-05 | 2000-08-04 | Intervertebrales fixierungssystem zur verwendung bei der behandlung des rückgrates |
EP00951549A EP1210914B1 (en) | 1999-08-05 | 2000-08-04 | Intervertebral fixing system used in treatments of the spinal column |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES009901798A ES2153331B1 (es) | 1999-08-05 | 1999-08-05 | Sistema de fijacion intervertebral para tratamientos de columna. |
ESP9901798 | 1999-08-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001010317A1 true WO2001010317A1 (es) | 2001-02-15 |
Family
ID=8309550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2000/000310 WO2001010317A1 (es) | 1999-08-05 | 2000-08-04 | Sistema de fijacion intervertebral para tratamientos de columna |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1210914B1 (es) |
AT (1) | ATE295126T1 (es) |
AU (1) | AU6444700A (es) |
DE (1) | DE60020131D1 (es) |
ES (1) | ES2153331B1 (es) |
WO (1) | WO2001010317A1 (es) |
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WO2005016161A1 (es) * | 2003-07-25 | 2005-02-24 | Traiber, S.A. | Dispositivo de fijación vertebral para tratamiento de la espondilolistesis |
WO2007141347A1 (es) * | 2006-06-05 | 2007-12-13 | Traiber, S.L. | Dispositivo de fijación vertebral y herramienta para. montaje de dicho dispositivo |
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Also Published As
Publication number | Publication date |
---|---|
ES2153331A1 (es) | 2001-02-16 |
EP1210914A1 (en) | 2002-06-05 |
ES2153331B1 (es) | 2001-09-01 |
AU6444700A (en) | 2001-03-05 |
ATE295126T1 (de) | 2005-05-15 |
EP1210914B1 (en) | 2005-05-11 |
DE60020131D1 (de) | 2005-06-16 |
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