AU645780B2 - Multifunctional rachis osteosynthesis device - Google Patents

Multifunctional rachis osteosynthesis device Download PDF

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Publication number
AU645780B2
AU645780B2 AU72511/91A AU7251191A AU645780B2 AU 645780 B2 AU645780 B2 AU 645780B2 AU 72511/91 A AU72511/91 A AU 72511/91A AU 7251191 A AU7251191 A AU 7251191A AU 645780 B2 AU645780 B2 AU 645780B2
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Australia
Prior art keywords
fixing part
nut
connection member
screw
shaped
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Expired
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AU72511/91A
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AU7251191A (en
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Patrick Henry
Jean-Louis Vignaud
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    • 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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/701—Longitudinal elements with a non-circular, e.g. rectangular, cross-section
    • 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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7007—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
    • 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
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8665—Nuts
    • A61B2017/867—Nuts with integral locking or clamping means
    • A61B2017/868—Nuts with integral locking or clamping means self-locking due to part of nut being deformed upon tightening

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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)
  • General Health & Medical Sciences (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Electrotherapy Devices (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Materials For Medical Uses (AREA)
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  • Road Paving Structures (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
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  • Photographic Processing Devices Using Wet Methods (AREA)
  • Furniture Connections (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Saccharide Compounds (AREA)
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Abstract

The object of the invention is a rachis ostheosynthesis device with pedicular screws of the type comprising a pin (1) having a threaded ogival shape and a threaded head (3) which are separated by a hexagonal body (2), said screws being connected by a linking element (5, 6), characterized in that it is comprised, additionally, of an unique fixing part (7, 8) provided with a hole (9) for the passage of said threaded head to which is screwed a nut (4, 4') for locking the assembly consisting of the fixing part (7. 8) and of the linking element (5, 6) on the head (3), one of the two members, that is to say either the fixing part or the linking element, being conformed on its lower face so as to form a groove (17, 21) for receiving and rotationally locking said hexagonal body (2). Application to osteosynthesis.

Description

4 1" 1,6 2 0*I 0000* 0* This invention is relative to a device permitting an osteosynthesis of rachis from the rear by means of implants, a portion of which is intended for bone anchorage in vertebral pedicles and another portion is intended to accommodate either a plate or a rod in order to connect the screws together.
As a rule, pedicular screws are implanted, that are connected solely either through plates or through rods.
The purpose of the invention is to provide an instrument of simple design, permitting a specially accurate and reliable positioning and locking of a plate as well as a rod, in order to facilitate the osteosynthesis of rachis, regardless of the anatomical conditions and deformations caused by kyphosis, scoliosis or scolio-kyphosis.
The invention provides a device for the osteosynthesis of rachis, comprising spaced-apart pedicular screws and connecting means for rigidly connecting together said pedicular screws, each pedicular screw comprising a threaded, ogivalshaped point and a threaded head separated by a body having an hexagonal cross-section, said connecting means comprising an elongated connection member and, associated to each screw, a fixing part provided with a traversing hole for the threaded head of the screw, and a nut screwed onto said threaded head for locking together said screws and said connecting means, wherein each fixing part or connection member comprises on its side facing the screw body, a groove for the accommodation of said hexagonal body and the locking against rotation of said screw, said locking being thus made independent from the tightening force of said nut.
Optionally, when said elongated connection member consists in a rod, each fixing part comprises on its side facing said nut a groove in the bottom of which said hole is provided, one flank of said groove forming a shoulder LI> while the other flank defines a concave-shaped 1/i A 2 2a accommodation surface for said rod, in that said locking nut is provided on its side facing said fixing part with a truncated portion capable of engaging said shoulder on the one hand and said rod on the other hand.
Alternatively, when said elongated connection member consists in a plate having traversing elongated openings for the passage of said screw heads, each fixing part is a U-shaped part having a pair of parallel lateral depending protrusions and overlapping the outer surface of said plate, in that said traversing hole provided in said U-shaped fixing part is an elongated hole, in that said plate is provided on its outer surface with transverse ribs and in that said U-shaped fixing part also is provided on its side facing said plate with 15 traverse ribs.
In one embodiment each nut has on its side opposite *said fixing part with a cylindrical tubular extension which is split diametrally for receiving a nut-tightening tool.
20 Figure 1 of the drawing is an exploded view of an embodiment of the device of the invention for fixing a rod, figure 2 is a cross section view of the device of figure 1 in an assembled condition, 25 figure 3 is an exploded view of an embodiment of the device for fixing a plate.
The device of the invention comprises pedicular screws of a known general type, consisting of three parts: a point i, a body 2, and a head 3.
The screw is made from materials approved for surgical uses in order to be bio-compatible and to eliminate any breaks of the materials when it enters the vertebral 3 0A body.
The screw point 1 is threaded and ogival-shaped and it is advantageous that the conicity of thread bottom and thread top is different.
The head of the screw 3 is cylindrical-shaped with a threading compatible for a locking nut for either a rod 5 (figure 1) or a plate 6 (figure 3) by means of one auxiliary part (7 or 8) provided with a smooth hole 9 at its central portion and threaded onto the head 3.
Nuts have an extension at their top in form of a cylindrical tubular part 10 provided with slots 11 permitting the nuts to be locked whereas the opposing parts are slightly moved closer to each other by means of a plier prior to the insertion of the screw head 3 into the auxiliary part 7,8 Besides, means are provided on either the sole auxiliary part or the connecting member for pedicular screws, in order to provide a seat for accommodation of and a locking means against rotation of the body 2 of screws with respect to said connecting member.
In the embodiment illustrated in figures 1 and 2, the auxiliary or sole intermediary part 7 is interposed between a rod 12 featuring a cylindrical section of a diameter adequate to withstand the rachis stresses and efforts, whereas the smooth surface has the advantage to permit a flexion in order to achieve a bending to some extent, to match the distorsions or the anatomy of rachis.
At its upper face, the part 7 comprises a central groove 13 in the bottom of which there is a hole 9. One of the flanks of groove 13 is straight and forms a shoulder 14 and the other groove flank defines a concave-shaped surface 15 housing the rod 12 by the hole 9.
In this embodiment, nuts 4 are extended at their lower portion by a truncated portion 16 capable of abutting (figure 2) on the one hand, on the edge of shoulder 14, and on the other hand, on rod 12 located in its housing when the assembly 7,12 is fixed and locked on a screw head 3.
At its lower part, the part is provided with a groove 17 (figure 2) associated to the body 2 and accommodating it while simultaneously locking it against rotation.
In the embodiment of figure 3, the sole intermediary part 8 is generally shaped as a U-part designed to overlap a sacrolumbar plate 18, with prebend and rectangular cross section, and comprising here and there oval-shaped holes 19 for accommodating the heads of screws 3.
The upper face of plate 18 is provided with transversal striae 20, and the lower face is provided with a groove 21 similar to the groove 13 of the part 7, and designed to accommodate and lock the bodies of screws 2.
The intermediary part 8 has a central portion featuring a hole 9, preferably oval-shaped for easier introduction of the screw head 3 and flanked by two lateral protusions 22 for guiding and wedging the part 8 along the upper striated face of plate 18, whereas the face of part 8 opposing striae 20 features matching striae.
Striae eliminate the need to move screw head 3 in the oval-shaped hole 19, once the nut 4' is clamped.
Nut 4' is similar to that shown in figures 1 and 2, except that it has no truncated portion at its base.
By altering the screw sizes the device of the invention makes it possible, in whatever embodiment, to achieve vertebral stabilizations on all the height of the dorsal sacrolumbar rachis.

Claims (4)

1. A device for the osteosynthesis of rachis, comprising spaced-apart pedicular screws and connecting means for rigidly connecting together said pedicular screws, each pedicular screw comprising a threaded, ogival- shaped point and a threaded head separated by a body having an hexagonal cross-section, said connecting means comprising an elongated connection member and, associated to each screw, a fixing part provided with a traversi ig hole for the threaded head of the screw, and a nut screwed onto said threaded head for locking together said screws and said connecting means, wherein each fixing part or connection member comprises on its side facing the screw body, a groove for the accommodation of said hexagonal body and the locking against rotation of said screw, said locking being thus made independent from the tightening force of said nut.
2. A device according to claim 1, wherein said elongated connection member consists in a rod, and wherein each fixing part comprises on its side facing said nut a groove in the bottom of which said hole is provided, one flank of said groove forming a shoulder 25 while the other flank defines a concave-shaped accommodation surface for said rod, in that said locking nut is provided on its side facing said fixing part with a truncated portion capable of engaging said shoulder on the one hand and said rod oil the other hand.
3. A device according to claim 1, wherein said elongated connection member consists in a plate having traversing elongated openings for the passage of said screw heads, and wherein each fixing part is a U-shaped part having a pair of parallel lateral depending protrusions and overlapping the outer surface of said plate, in that said traversing hole provided in said U- shaped fixing part is an elongated hole, in that said i\ plate is provided on its outer surface with transverse l~q S:022030A 6 ribs and in that said U-shaped fixing part also is provided on its side facing said plate with traverse ribs.
4. A device according to any one of claims 1 to 3, wherein each nut has on its side opposite saic fixing part with a cylindrical tubular extension which is split diametrally for receiving a nut-tightening tool. A device for the osteosynthesis of rachis substantially as herein described with reference to the accompanying drawings. DATED this 16th day of November 1993 JEAN-LOUIS VIGNAUD and PATRICK HENRY By their Patent Attorneys GRIFFITH HACK CO. *0* **o ABSTRACT The object of the invention is a device for the os- teosynthesis of rachis having pedicular screws, of the type that comprises a threaded, ogival-shaped point (1) and a threaded head that are separated by a hexagonal body said screws being linked by a connection member characterised in that it also comprises a sole fixing part provided with a passage hole for said threaded head on which a nut is screwed for loc'kin the assem- bly consisting of the fixing part and the connection member on said head one of these, either the fixing part or the connection member having its inner face shaped in order to provide a groove (17,21) for the accomo- dation and locking against rotation of said hexagonal body (2) Application: osteosynthesis Figure 1
AU72511/91A 1990-02-08 1991-02-08 Multifunctional rachis osteosynthesis device Expired AU645780B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001633A FR2657775B1 (en) 1990-02-08 1990-02-08 MULTIFUNCTIONAL SPINDLE OR PLATE RACHIDIAN INSTRUMENTATION.
FR9001633 1990-02-08

Publications (2)

Publication Number Publication Date
AU7251191A AU7251191A (en) 1991-09-03
AU645780B2 true AU645780B2 (en) 1994-01-27

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AU72511/91A Expired AU645780B2 (en) 1990-02-08 1991-02-08 Multifunctional rachis osteosynthesis device

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EP (1) EP0441084B1 (en)
JP (1) JP2554298B2 (en)
AT (1) ATE135551T1 (en)
AU (1) AU645780B2 (en)
BG (1) BG60286B2 (en)
CA (1) CA2051408C (en)
DE (1) DE69026067T2 (en)
DK (1) DK0441084T3 (en)
DZ (1) DZ1470A1 (en)
ES (1) ES2086391T3 (en)
FI (1) FI102512B1 (en)
FR (1) FR2657775B1 (en)
GR (1) GR3020170T3 (en)
HU (1) HU209422B (en)
IE (1) IE74188B1 (en)
IS (1) IS1587B (en)
MA (1) MA22018A1 (en)
NO (1) NO180322C (en)
PT (1) PT96202B (en)
RO (1) RO107081B1 (en)
RU (1) RU2043081C1 (en)
TN (1) TNSN90149A1 (en)
TR (1) TR25016A (en)
WO (1) WO1991011967A1 (en)

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FR2719759B1 (en) * 1994-05-16 1996-08-30 Charles Khalife Intervertebral osteosynthesis system, in particular with transverse reinforcement device.
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FR2736258B1 (en) * 1995-07-07 1997-10-17 Eurosurgical DEVICE FOR FIXING ON A STEM OF AN ORGAN, PARTICULARLY FOR A RACHIDIAN ORTHOPEDIC INSTRUMENTATION
DE19607517C1 (en) 1996-02-28 1997-04-10 Lutz Biedermann Bone screw for osteosynthesis
US5713900A (en) * 1996-05-31 1998-02-03 Acromed Corporation Apparatus for retaining bone portions in a desired spatial relationship
FR2768609B1 (en) 1997-09-23 2000-01-14 Dimso Sa SCREW AND PLATE SYSTEM FOR OSTEOSYNTHESIS OF THE RACHIS
ES2166258B1 (en) * 1999-05-11 2004-11-16 Jesus Burgos Flores PROCEDURE AND APPLIANCES USED FOR SURGICAL TREATMENT BY PREVIOUS ENDOSCOPIC TECHNIQUE OF DISEASES OF THE VERTEBRAL COLUMN, ESPECIALLY SCHOLIOSIS.
EP1080692A1 (en) 1999-09-03 2001-03-07 Bone & Joint Research S.A. Flexible connection for bone anchor means
WO2002028299A1 (en) * 2000-10-05 2002-04-11 Jesus Burgos Flores Method and apparatus for surgical treatment of diseases of the vertebral column, especially scoliosis, using anterior endoscopic technique
DE60114149T2 (en) * 2001-04-24 2007-04-05 Co-Ligne Ag Instrumentation for the stabilization of certain vertebrae of the spine
FR2831420B1 (en) 2001-10-30 2004-07-16 Vitatech APPARATUS FOR HOLDING THE SPIN WITH JOINTING ASSEMBLY
FR2831419B1 (en) 2001-10-30 2004-07-16 Vitatech APPARATUS FOR HOLDING RUBBER ASSEMBLY WITH BALL JOINT
FR2848408B1 (en) 2002-12-17 2005-08-19 Vitatech DEVICE WITH ANTERIOR PLATE FOR MAINTAINING THE RACHIS
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US4743260A (en) * 1985-06-10 1988-05-10 Burton Charles V Method for a flexible stabilization system for a vertebral column
FR2615095A1 (en) * 1987-05-15 1988-11-18 Fabrication Materiel Orthopedi Osteosynthesis instrumentation for the correction of lumbar scoliosis through the posterior
AU638265B2 (en) * 1989-07-26 1993-06-24 Aesculap Ag & Co. Kg Device for straightening, securing, compressing and elongating the spinal column

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10034690B2 (en) 2014-12-09 2018-07-31 John A. Heflin Spine alignment system
US10736668B2 (en) 2014-12-09 2020-08-11 John A. Heflin Spine alignment system

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GR3020170T3 (en) 1996-09-30
MA22018A1 (en) 1991-07-01
FI906130A0 (en) 1990-12-13
RO107081B1 (en) 1993-09-30
PT96202A (en) 1991-09-30
NO180322B (en) 1996-12-23
IE74188B1 (en) 1997-07-16
EP0441084A1 (en) 1991-08-14
IS1587B (en) 1996-03-01
RU2043081C1 (en) 1995-09-10
CA2051408A1 (en) 1991-08-09
CA2051408C (en) 1997-12-30
AU7251191A (en) 1991-09-03
ES2086391T3 (en) 1996-07-01
PT96202B (en) 1998-07-31
IS3657A7 (en) 1991-08-09
IE904456A1 (en) 1991-08-14
FI102512B (en) 1998-12-31
FR2657775B1 (en) 1992-05-29
HU913515D0 (en) 1992-02-28
WO1991011967A1 (en) 1991-08-22
NO180322C (en) 1997-04-02
TNSN90149A1 (en) 1991-03-05
BG60286B2 (en) 1994-04-29
FI906130A (en) 1991-08-09
HUT60120A (en) 1992-08-28
JP2554298B2 (en) 1996-11-13
DE69026067D1 (en) 1996-04-25
NO905367L (en) 1991-08-09
NO905367D0 (en) 1990-12-12
DE69026067T2 (en) 1996-10-02
FR2657775A1 (en) 1991-08-09
JPH04506923A (en) 1992-12-03
DZ1470A1 (en) 2004-09-13
EP0441084B1 (en) 1996-03-20
TR25016A (en) 1992-09-01
DK0441084T3 (en) 1996-07-22
FI102512B1 (en) 1998-12-31
HU209422B (en) 1994-06-28
ATE135551T1 (en) 1996-04-15

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