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ES2251861A1 - Mono-axial fixation curved back screw for fractures and vertebral injuries, has double bevel opposite edge of screw head in contact with broad bevel of washer at angle with respect to sagittal plane - Google Patents

Mono-axial fixation curved back screw for fractures and vertebral injuries, has double bevel opposite edge of screw head in contact with broad bevel of washer at angle with respect to sagittal plane

Info

Publication number
ES2251861A1
ES2251861A1 ES200400279A ES200400279A ES2251861A1 ES 2251861 A1 ES2251861 A1 ES 2251861A1 ES 200400279 A ES200400279 A ES 200400279A ES 200400279 A ES200400279 A ES 200400279A ES 2251861 A1 ES2251861 A1 ES 2251861A1
Authority
ES
Spain
Prior art keywords
screw
washer
bevel
contact
fractures
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.)
Granted
Application number
ES200400279A
Other languages
Spanish (es)
Other versions
ES2251861B1 (en
Inventor
German Perez Cosias
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Surgival Co S A
SURGIVAL CO SA
Original Assignee
Surgival Co S A
SURGIVAL CO SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Surgival Co S A, SURGIVAL CO SA filed Critical Surgival Co S A
Priority to ES200400279A priority Critical patent/ES2251861B1/en
Publication of ES2251861A1 publication Critical patent/ES2251861A1/en
Application granted granted Critical
Publication of ES2251861B1 publication Critical patent/ES2251861B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass

Landscapes

  • 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)

Abstract

A back screw has a double bevel located opposite the edge of a screw head and in contact with the broad bevel of a washer at an angle of 20 degrees with respect to the sagittal plane. A tightening screw fastened to the washer has a wing with radius equal to that of the washer. The contact between bevels generates two continuous transverse lines.

Description

Tornillo monoaxial de fijación lumbosacra para fracturas y lesiones vertebrales.Lumbosacral Monoaxial Screw for vertebral fractures and injuries.

Objeto de la invenciónObject of the invention

La presente invención se refiere a un tornillo monoaxial de fijación lumbosacra para fracturas y lesiones vertebrales, de entre los diferentes medios de fijación de vértebras que utilizan tornillos transpediculares.The present invention relates to a screw luaxosacral fixation monoaxial for fractures and injuries vertebral, among the different means of fixation of vertebrae that use transpedicular screws.

Caracteriza esta invención una especial construcción corta del tornillo, lo que le hace menos invasivo y permite mayores angulaciones de las barras trans-versales del sistema de fijación y en mayor número de posiciones de las mismas.This invention characterizes a special short screw construction, which makes it less invasive and allows greater angulation of the bars trans-verbal fixation system and in greater number of positions thereof.

Aparte de ello incorpora una arandela especial y un tornillo interior de apriete, de tipo chincheta.Apart from that it incorporates a special washer and an internal tightening screw, pushpin type.

Antecedentes de la invenciónBackground of the invention

Tanto para la síntesis vertebral como para la corrección de deformidades de la columna se dispone, construyendo un montaje al menos entre dos vértebras, de unos medios de sujeción que incorporan, al menos, una pareja de tornillos, insertos en las vértebras de forma muy precisa, para facilitar el paso de las barras de unión entre vértebras. Aparte de ello, unas barras transversales, que fijan la posición de estas barra de unión bajo carga, obligan a las mismas a un perfecto paralelismo, para eludir con ello el posible daño a las vértebras.For both vertebral synthesis and for deformity correction of the column is arranged, building an assembly between at least two vertebrae, of some fastening means which incorporate at least one pair of screws, inserted in the vertebrae very precisely, to facilitate the passage of joining bars between vertebrae. Apart from that, some bars transverse, which fix the position of these tie bar under load, force them to a perfect parallelism, to avoid with it the possible damage to the vertebrae.

El solicitante dispone de una patente de invención, de N° ES 2 154227, denominada: "Sistema poliaxial de fijación de vértebras", que incorpora tornillos poliaxiales de inserción, que permitan posicionar la barra longitudinal independientemente de la orientación del eje del tornillo, así como de medios de fijación de las barras transversales, mediante coronas dentadas que posibilitan la unión no ortogonal entre barras longitudinales.The applicant has a patent for invention of No. ES 2 154227, called: "Polyaxial system of fixation of vertebrae ", which incorporates polyaxial screws of insertion, which allow to position the longitudinal bar regardless of the orientation of the screw shaft, as well as of means for fixing the crossbars by means of crowns teeth that allow non-orthogonal connection between bars Longitudinal

No obstante lo anterior, junto a esta invención convive la construcción de los tornillos monoaxiales, es decir, de aquellos tornillos más convencionales en los que la cabeza y el cuerpo se constituyen en pieza única.Notwithstanding the foregoing, together with this invention coexists the construction of monoaxial screws, that is, of those more conventional screws in which the head and the body constitute a single piece.

En estos sistemas de raquis monoaxiales se requiere una gran precisión en la orientación de las barras longitudinales durante el proceso de estabilización del sistema, cosa que no facilita la construcción del tornillo en la totalidad de los casos. Así mismo se requiere su adecuada instrumentación en quirófano.In these monoaxial spine systems, requires great precision in the orientation of the bars Longitudinal during the system stabilization process, something that does not facilitate the construction of the screw in the whole of the cases. It also requires its proper instrumentation in operating room

El solicitante desconoce la existencia de tornillos monoaxiales que resuelvan la problemática anteriormente descrita, con la sencillez y eficacia de la invención que ahora se procede a describir, en base a un conjunto de tornillo en construcción especial.The applicant is unaware of the existence of monoaxial screws that solve the problem before described, with the simplicity and effectiveness of the invention that is now proceed to describe, based on a screw assembly in special construction

Descripción de la invenciónDescription of the invention

La presente invención se refiere a un tornillo monoaxial de fijación lumbosacra para fracturas y lesiones vertebrales, de entre todos aquellos diferentes medios de fijación de vértebras que utilizan conjuntos de tornillos transpediculares de tipo monoaxial.The present invention relates to a screw luaxosacral fixation monoaxial for fractures and injuries vertebral, among all those different means of fixation of vertebrae that use transpedicular screw assemblies monoaxial type.

Caracteriza esta invención una especial construcción corta del tornillo, lo que le hace menos invasivo y acorta los tiempos de intervención, reduciendo las necesidades de anestesia y de quirófano. En este tornillo se conjuga el referido acortamiento con una especial construcción de la zona de cuna de la barra, configurada en doble biselado opuesto con arista viva central.This invention characterizes a special short screw construction, which makes it less invasive and shortens intervention times, reducing the needs of anesthesia and operating room. In this screw the referred one is conjugated shortening with a special construction of the cradle area of the bar, configured in opposite double bevel with live edge central.

Esta forma especial permite mayores angulaciones de las barras transversales del sistema de fijación y en mayor número de posiciones de las mismas, en conjunción con la especial construcción de la arandela intermedia, la cual dispone su base inferior ampliamente biselada, lo que posibilita que se mantenga el contacto de arandela y barra a lo largo del tramo de apoyo de aquella sobre ésta, incluso con una importante angulación respecto del plano sagital.This special shape allows for greater angulations. of the crossbars of the fixing system and in greater number of positions thereof, in conjunction with the special construction of the intermediate washer, which has its base Widely bevelled bottom, which allows the washer and rod contact along the support section of that on this one, even with an important angulation regarding of the sagittal plane.

Completa la invención un tornillo interior de apriete, de tipo chincheta, inserto en el cuerpo de la arandela y con la generatriz de su ala de igual radio que la de ésta.The invention completes an inner screw of tighten, pushpin type, inserted into the body of the washer and with the generatrix of its wing of the same radius as its wing.

Descripción de los dibujosDescription of the drawings

Se complementa la presente memoria descriptiva, con un juego de planos, ilustrativos del ejemplo preferente y nunca limitativo de la invención.This descriptive report is complemented, with a set of drawings, illustrative of the preferred example and never limiting the invention.

La Figura 1 es una perspectiva del conjunto del tornillo transpedicular de la invención.Figure 1 is a perspective of the whole of the transpedicular screw of the invention.

La Figura 2 es una explosión de los tres componentes del mismo, así como una vista en planta superior de su pieza principal.Figure 2 is an explosion of the three components thereof, as well as a top plan view of its main piece

La Figura 3 muestra un montaje del sistema que incorpora este tornillo.Figure 3 shows a system assembly that incorporate this screw.

Realización preferente de la invenciónPreferred Embodiment of the Invention

A la vista de lo anteriormente enunciado, la presente invención se refiere a un tornillo monoaxial de fijación lumbosacra para fracturas y lesiones vertebrales, de entre los diferentes conjuntos de tornillos transpediculares de tipo monoaxial, que reduce el número de elementos componentes del sistema, esencialmente caracterizado por conjugar una construcción corta, en sentido longitudinal, del cuerpo (1.1) tornillo (1) con una construcción en doble biselado (1.2) opuesto con arista viva (1.3) central de la zona de cuna (1.4) de la barra (4); así como una arandela (2) intermedia con amplio bisel (2.1) de su base inferior, generando dos líneas continuas y transversales en su proyección, de contacto de la barra (4), con la línea curva de la arista (1.3) de la cuna (1.4) del tornillo (1) y a lo largo del tramo de contacto de la misma con el bisel (2.1) de la arandela (2), en angulación respecto del plano sagital de hasta 20°.In view of the foregoing, the The present invention relates to a monoaxial fixing screw lumbosacral fractures and vertebral lesions, among different sets of transpedicular type screws monoaxial, which reduces the number of component elements of the system, essentially characterized by combining a construction cut, lengthwise, the body (1.1) screw (1) with a double beveled construction (1.2) opposite with a sharp edge (1.3) center of the cradle area (1.4) of the bar (4); as well as an intermediate washer (2) with wide bevel (2.1) from its base lower, generating two continuous and transversal lines in its projection, contact bar (4), with the curved line of the edge (1.3) of the cradle (1.4) of the screw (1) and along the section of contact of the same with the bevel (2.1) of the washer (2), in angulation with respect to the sagittal plane of up to 20 °.

Caracteriza también un tornillo de apriete (3), superior a la arandela (2), de tipo chincheta, inserto en el cuerpo de la arandela (2) y con la generatriz de su ala (3.1) de igual radio que la de ésta.It also features a clamping screw (3), upper than the washer (2), pushpin type, inserted in the body of the washer (2) and with the generatrix of its wing (3.1) of equal radio than this one.

El conjunto formado por varias parejas de tornillos monoaxiales (1,2 3) unidos por barras (4) se arma mediante otras barras transversales (5) unidas a estas barras (4) mediante tornillos (6) de autosujeción convencionales.The set formed by several couples of monoaxial screws (1,2 3) attached by bars (4) are assembled by other crossbars (5) attached to these bars (4) by means of conventional self-clamping screws (6).

No altera la esencialidad de esta invención variaciones en materiales, forma, tamaño y disposición de los elementos componentes, descritos de manera no limitativa, bastando ésta para proceder a su reproducción por un experto.It does not alter the essentiality of this invention variations in materials, shape, size and arrangement of component elements, described in a non-limiting manner, sufficient this one to proceed to its reproduction by an expert.

Claims (1)

1. Tornillo monoaxial de fijación lumbosacra para fracturas y lesiones vertebrales, de entre los diferentes conjuntos de tornillos transpediculares de tipo monoaxial, esencialmente caracterizado por disponer un tornillo (1) con cuerpo (1.1) corto y una construcción en doble biselado (1.2) opuesto con arista viva (1.3) central de la zona de cuna (1.4) de la barra (4); así como una arandela (2) intermedia con amplio bisel (2.1) de su base inferior, generando dos líneas continuas y transversales en su proyección, de contacto de la barra (4), con la línea curva de la arista (1.3) de la cuna (1.4) del tornillo (1) y a lo largo del tramo de contacto de la misma con el bisel (2.1) de la arandela (2), en angulación respecto del plano sagital de hasta 20°; así como un tornillo de apriete (3), superior a la arandela (2), de tipo chincheta, inserto en el cuerpo de la arandela (2) y con la generatriz de su ala (3.1) de igual radio que la de ésta.1. Lumbosacral monoaxial fixation screw for fractures and vertebral lesions, among the different sets of transpedicular monoaxial type screws, essentially characterized by having a screw (1) with a short body (1.1) and a double bevel construction (1.2) opposite with live edge (1.3) central of the cradle area (1.4) of the bar (4); as well as an intermediate washer (2) with wide bevel (2.1) of its lower base, generating two continuous and transverse lines in its projection, of contact of the bar (4), with the curved line of the edge (1.3) of the cradle (1.4) of the screw (1) and along its section of contact with the bevel (2.1) of the washer (2), angled with respect to the sagittal plane of up to 20 °; as well as a tightening screw (3), superior to the washer (2), of pushpin type, inserted in the body of the washer (2) and with the generator of its wing (3.1) of the same radius as that of the latter.
ES200400279A 2004-02-09 2004-02-09 LUMBOSACRA MONOAXIAL FIXING SCREW FOR FRACTURES AND VERTEBRAL INJURIES. Expired - Fee Related ES2251861B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES200400279A ES2251861B1 (en) 2004-02-09 2004-02-09 LUMBOSACRA MONOAXIAL FIXING SCREW FOR FRACTURES AND VERTEBRAL INJURIES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200400279A ES2251861B1 (en) 2004-02-09 2004-02-09 LUMBOSACRA MONOAXIAL FIXING SCREW FOR FRACTURES AND VERTEBRAL INJURIES.

Publications (2)

Publication Number Publication Date
ES2251861A1 true ES2251861A1 (en) 2006-05-01
ES2251861B1 ES2251861B1 (en) 2008-11-16

Family

ID=36370878

Family Applications (1)

Application Number Title Priority Date Filing Date
ES200400279A Expired - Fee Related ES2251861B1 (en) 2004-02-09 2004-02-09 LUMBOSACRA MONOAXIAL FIXING SCREW FOR FRACTURES AND VERTEBRAL INJURIES.

Country Status (1)

Country Link
ES (1) ES2251861B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465158A2 (en) * 1990-07-04 1992-01-08 Seyed Mohammad Hossein Mehdian Apparatus for use in the treatment of spinal disorders
EP0682918A1 (en) * 1994-05-20 1995-11-22 Groupe Lepine Spinal osteosynthesis device
FR2747028A1 (en) * 1996-04-09 1997-10-10 Stryker France Sa Bone anchor for prosthetic joint
US6585737B1 (en) * 1998-04-30 2003-07-01 Stryker Spine Backbone osteosynthesis system with collar and lock
EP0880344B1 (en) * 1996-02-15 2003-08-06 Prof. Dr. med. Peter Griss Osteosynthetic mounting element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0465158A2 (en) * 1990-07-04 1992-01-08 Seyed Mohammad Hossein Mehdian Apparatus for use in the treatment of spinal disorders
EP0682918A1 (en) * 1994-05-20 1995-11-22 Groupe Lepine Spinal osteosynthesis device
EP0880344B1 (en) * 1996-02-15 2003-08-06 Prof. Dr. med. Peter Griss Osteosynthetic mounting element
FR2747028A1 (en) * 1996-04-09 1997-10-10 Stryker France Sa Bone anchor for prosthetic joint
US6585737B1 (en) * 1998-04-30 2003-07-01 Stryker Spine Backbone osteosynthesis system with collar and lock

Also Published As

Publication number Publication date
ES2251861B1 (en) 2008-11-16

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