FR2877831A1 - Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle - Google Patents

Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle Download PDF

Info

Publication number
FR2877831A1
FR2877831A1 FR0412004A FR0412004A FR2877831A1 FR 2877831 A1 FR2877831 A1 FR 2877831A1 FR 0412004 A FR0412004 A FR 0412004A FR 0412004 A FR0412004 A FR 0412004A FR 2877831 A1 FR2877831 A1 FR 2877831A1
Authority
FR
France
Prior art keywords
clip
piece
clamping device
spinal
rod tightening
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.)
Pending
Application number
FR0412004A
Other languages
French (fr)
Inventor
Jean Pierre Huitema
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR0412004A priority Critical patent/FR2877831A1/en
Publication of FR2877831A1 publication Critical patent/FR2877831A1/en
Pending 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
    • 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
    • A61B17/7034—Screws or hooks with U-shaped head or back through which longitudinal rods pass characterised by a lateral opening

Abstract

The device has a clip with transversal axle that supports in two circular cavities (3) having a complete elasticity caused by a recess (4). The cavities partially rise during starting of tightening of a spinal rod and lower when a protrusion of the clip passes on a side of a vertical projection of the axle. The clip has a vertical hole that supports to allow rotation of a head (1) of an implant.

Description

2877831 12877831 1

La présente invention a pour objet un dispositif de blocage afin de solidariser des tiges rachidiennes aux vis pédiculaires et aux crochets ou toute autre broche pénétrant dans la matière osseuse.  The present invention relates to a locking device for securing spinal rods pedicle screws and hooks or any other pin penetrating the bone material.

On connaît essentiellement les systèmes de fixation par vis s'introduisant dans un corps de section U. Ces systèmes ont beaucoup d'inconvénients lors de la pose. Le praticien se trouvant assez loin du champ opératoire, l'amorçage des vis dans le filetage ou sur le filetage est très difficile; d'autre part lorsque l'effet de serrage se produit sur la tige rachidienne, le corps de section U a tendance à s'écarter, supprimant ainsi les effets de serrage d'autant que la tige n'est pas systématiquement rectiligne dans le corps de section U. L'effet de matage entre la tige et la vis fait que peu de temps après l'opération on constate une certaine mobilité sur tout l'appareillage au risque d'avoir un glissement latéral ou vertical des tiges rachidiennes.  Essentially known are fastening systems by screws introduced into a body section U. These systems have many disadvantages during installation. The practitioner is far enough from the operative field, the priming of the screws in the thread or on the thread is very difficult; on the other hand, when the tightening effect occurs on the spinal rod, the body of section U tends to move away, thus eliminating the effects of tightening especially as the rod is not always straight in the body The matting effect between the rod and the screw means that shortly after the operation there is a certain mobility on all the equipment, with the risk of lateral or vertical sliding of the spinal rods.

D'autres fabricants ou constructeurs ont essayé différents systèmes aboutissant à des inconvénients similaires.  Other manufacturers or manufacturers have tried different systems with similar disadvantages.

On connaît également le système de serrage à clip déposé sous le n 03 04439 où mécaniquement l'effet de blocage est pratiquement nul car la tête n'a aucune élasticité verticale, celle-ci est occasionnée partiellement par la déformation des axes latéraux et la forme du clip révèle l'inefficacité du serrage de la tige rachidienne.  It is also known the clip clamping system deposited under No. 03 04439 where mechanically the locking effect is practically zero because the head has no vertical elasticity, this is partly caused by the deformation of the lateral axes and the shape of the clip reveals the inefficient tightening of the spinal rod.

Le dispositif selon l'invention permet de remédier à tous ces problèmes dans la mesure où l'effet de blocage est produit par un clip venant sertir la tige rachidienne par un effet ressort occasionné par un support élastique.  The device according to the invention overcomes all these problems insofar as the locking effect is produced by a clip from crimping the spinal rod by a spring effect caused by an elastic support.

L'ensemble du mécanisme sera exécuté dans un métal biocompatible dans les inox ou titane ayant une limite élastique élevée.  The entire mechanism will be performed in a biocompatible metal in stainless steel or titanium having a high yield strength.

L'invention est décrite ci-après selon un mode de réalisation particulier non limitatif en regard des dessins annexés sur lesquels: - la figure 1 représente de profil une tête de vis ou de crochet.  The invention is described below according to a particular non-limiting embodiment with reference to the accompanying drawings, in which: FIG. 1 is a profile of a screw or hook head.

- la figure 2 représente de face une tête de vis ou de crochet de section U. - la figure 3 représente de profil le clip en position de serrage sur une tige rachidienne.  FIG. 2 is a front view of a screw or hook head of section U. FIG. 3 is a profile view of the clip in a clamping position on a spinal rod.

- la figure 4 représente de face le clip en position de serrage sur une tige rachidienne.  - Figure 4 shows the front clip in the clamping position on a spinal rod.

2877831 2 En référence à ces dessins, le dispositif de serrage selon l'invention est composé de deux pièces (1,5). Sur la figure 1 on a représenté de profil la pièce (1). Celle-ci possède une fente latérale de chaque côté (2) avec dans sa partie supérieure une entrée chanfreinée suivie d'une découpe circulaire (3) dans laquelle viendra se loger l'axe transversal (6) du clip (5). Après cette découpe circulaire, les fentes latérales sont prolongées par un évidement (4) afin de donner toute l'élasticité à la tête de l'implant (1) lors du blocage de la tige rachidienne (7) dans la pièce (1) au fond de la partie en U (12) représentée par la figure 2.  In reference to these drawings, the clamping device according to the invention is composed of two parts (1,5). In Figure 1 is shown in profile the part (1). It has a lateral slot on each side (2) with in its upper part a chamfered entry followed by a circular cutout (3) in which will be housed the transverse axis (6) of the clip (5). After this circular cut, the lateral slots are extended by a recess (4) to give all the elasticity to the head of the implant (1) during the locking of the spinal rod (7) in the piece (1) at bottom of the U-shaped portion (12) shown in FIG.

La tige rachidienne (7) est abaissée et ramenée à l'intérieur de la pièce en U avec un instrument prenant appui sur deux fraisages saillants (11) à la base extérieure de la tête d'implant. L'introduction du clip (5) est facilitée par la partie chanfreinée des fentes latérales.  The spinal rod (7) is lowered and brought back inside the U-shaped part with an instrument resting on two projecting millings (11) at the outer base of the implant head. The introduction of the clip (5) is facilitated by the chamfered portion of the side slots.

La figure 3 représente la position du clip (5) lorsque le serrage et le blocage sont en pleine application. L'axe (6) traverse entièrement le clip (5) de façon à ne fragiliser en aucun cas les appuis lors du serrage. Hormis cet axe (6) qui ne doit en aucun cas se déformer, le clip (5) a un profil parfaitement étudié avec, à sa base, une protubérance (8) qui, lors du serrage, bascule de l'autre côté de la projection verticale de l'axe (6). Cette protubérance (8) qui sert à bloquer le système est arrêtée dans sa rotation par l'appui du nez du clip (9) se trouvant à l'opposé de cette protubérance (8).  Figure 3 shows the position of the clip (5) when the clamping and locking are in full application. The shaft (6) completely traverses the clip (5) so as not to weaken the supports during tightening. Apart from this axis (6), which must in no way be deformed, the clip (5) has a perfectly studied profile with, at its base, a protrusion (8) which, when tightening, switches to the other side of the vertical projection of the axis (6). This protuberance (8) which serves to lock the system is stopped in its rotation by the support of the nose of the clip (9) located opposite of this protuberance (8).

La figure 4 représente le clip (5) traversé par son axe (6) qui prend appui dans les deux cages de rotation (3) ayant une complète élasticité provoquée par l'évidement (4). Cette partie élastique de la tête de l'implant se lève partiellement lors du début du serrage et se rabaisse lorsque la protubérance (8) du clip (5) passe de l'autre côté de la projection verticale de l'axe (6). Cette position permet un blocage complet des mouvements avants et arrières de la tige rachidienne (7). Le serrage est occasionné par la rotation du clip (5), rotation elle-même occasionnée en prenant appui par un trou (10) usiné verticalement dans le clip (5). Le clip (5) est traversé par un axe (6) sur toute sa largeur dépassant de part et d'autre afin de venir prendre appui dans les cavités circulaires (3) prévues à cet effet. Aucune partie du clip n'est élastique. Le serrage est occasionné par cette protubérance (8) du clip (5) bloqué dans sa rotation par le nez du clip (9) prenant tout simplement appui sur la tige rachidienne (7) signalant en même temps le serrage complet.  FIG. 4 shows the clip (5) traversed by its axis (6) which bears in the two rotation cages (3) having a complete elasticity caused by the recess (4). This elastic part of the head of the implant rises partially at the beginning of the clamping and is lowered when the protrusion (8) of the clip (5) passes on the other side of the vertical projection of the axis (6). This position allows complete blockage of the front and back movements of the spinal rod (7). Clamping is caused by the rotation of the clip (5), rotation itself caused by being supported by a hole (10) machined vertically in the clip (5). The clip (5) is traversed by an axis (6) over its entire width protruding from both sides to bear in the circular cavities (3) provided for this purpose. No part of the clip is elastic. The tightening is caused by this protrusion (8) of the clip (5) blocked in its rotation by the nose of the clip (9) simply pressing on the spinal rod (7) simultaneously signaling the complete tightening.

2877831 3 La morphologie de ce clip permet une installation dans l'implant (1) avec la protubérance (8) présentée vers l'avant ou l'arrière et permet ainsi un serrage d'un côté ou de l'autre facilitant ainsi le travail en fonction de la place constatée dans le champ opératoire.  2877831 3 The morphology of this clip allows installation in the implant (1) with the protuberance (8) presented forwards or backwards and thus allows clamping on one side or the other, thus facilitating the work. depending on the position observed in the operative field.

Ce dispositif de serrage s'adapte aux têtes de vis pédiculaires et crochets ou tout autre broche pénétrant dans la matière osseuse.  This clamping device adapts to the pedicle screw heads and hooks or any other pin penetrating the bone material.

Lorsque les implants sont en place dans la partie osseuse, le praticien préforme les tiges rachidiennes selon l'indication et les installe à l'intérieur de la pièce (1). Lorsque la tige rachidienne (7) est installée dans le fond de la pièce de section U, le clip (5) sera engagé dans les fentes (2) jusqu'à ce que l'axe (6) se place dans les cavités circulaires (3) laissant à ce moment-là la tige (7) maintenue dans son implant tout en restant mobile de part et d'autre. Lorsque le positionnement définitif est déterminé, un instrument sera appliqué dans le trou (10) ; il suffit alors de faire un mouvement arrière afin de serrer la pièce (5) sur la tige (7).  When the implants are in place in the bone part, the practitioner preforms the spinal rods according to the indication and installs them inside the room (1). When the spinal rod (7) is installed in the bottom of the part of section U, the clip (5) will be engaged in the slots (2) until the axis (6) is placed in the circular cavities ( 3) leaving at this time the rod (7) maintained in its implant while remaining mobile on both sides. When the final positioning is determined, an instrument will be applied in the hole (10); it is then sufficient to make a rearward movement to tighten the piece (5) on the rod (7).

L'installation du clip (5) diminue le temps d'exécution du travail. Le trou (10) de la pièce (5) permet également un déserrage extrêmement rapide donnant ainsi au chirurgien la possibilité de se reprendre et parfaire l'installation des implants.  Installing the clip (5) decreases the execution time of the job. The hole (10) of the part (5) also allows an extremely fast loosening thus giving the surgeon the opportunity to recover and perfect the installation of the implants.

Claims (1)

4 REVENDICATIONS4 CLAIMS 1) Dispositif de serrage s'adaptant aux têtes de vis pédiculaires, crochets et toute autre broche pénétrant dans la matière osseuse, dans le cadre des opérations du rachis, caractérisé en ce qu'il comprend une première et une seconde pièce (1,5) s'accouplant par un effet de glissement dans une fente chanfreinée (2) de la pièce (1).  1) Clamping device adapted to the pedicle screw heads, hooks and any other pin penetrating the bone material, in the context of spine operations, characterized in that it comprises a first and a second piece (1.5 ) mating by a sliding effect in a chamfered slot (2) of the part (1). 2) Dispositif de serrage s'adaptant aux têtes de vis pédiculaires et crochets selon la revendication 1, caractérisé en ce que les fentes chanfreinée (2) de la pièce (1) présentent dans leur partie supérieure une cavité (3) permettant à l'axe de la pièce (5) de faire une rotation.  2) Clamping device adapted to pedicle screw heads and hooks according to claim 1, characterized in that the chamfered slots (2) of the part (1) have in their upper part a cavity (3) allowing the axis of the piece (5) to rotate. 3) Dispositif de serrage s'adaptant aux têtes. de vis pédiculaires et crochets selon. l'une quelconque des revendications 1 et 2, caractérisé en ce que la fente (2) de la pièce (1.) est prolongée par un évidement (4) permettant d'obtenir l'élasticité- de la matière.  3) Clamping device adapting to the heads. of pedicle screws and hooks according to. any one of claims 1 and 2, characterized in that the slot (2) of the piece (1.) is extended by a recess (4) to obtain the elasticity of the material. 4) Dispositif de serrage- s'adaptant aux têtes de vis pédiculaires et crochets selon l'une quelconque des revendications 1, 2 et 3, caractérisé en ce que la pièce (5) présente une protubérance (8) qui, lorsque la pièce (5) prend appui sur son axe (6) de part et d'autre dans les cavités (3), permet ainsi, après rotation de la pièce (5) de bloquer une tige rachidienne (7) par effet de pression de la protubérance (8) occasionné par l'élasticité du mécanisme, elle-même augmentée par l'évidement (4).  4) Clamping device - adapting to pedicle screw heads and hooks according to any one of claims 1, 2 and 3, characterized in that the piece (5) has a protrusion (8) which, when the piece ( 5) is supported on its axis (6) on both sides in the cavities (3), thus, after rotation of the workpiece (5) to block a spinal rod (7) by the pressure effect of the protrusion ( 8) caused by the elasticity of the mechanism, itself increased by the recess (4). 5) Dispositif de serrage s'adaptant aux têtes de vis pédiculaires et crochets selon l'une quelconque des revendications 1, 2, 3 et 4, caractérisé en ce que la tête (1) de section U possède à sa base extérieure un fraisage saillant (11) permettant de prendre appui afin d'abaisser la tige rachidienne (7) dans le fond de l'implant (12).  5) Clamping device adapted to the pedicle screw heads and hooks according to any one of claims 1, 2, 3 and 4, characterized in that the head (1) section U has at its outer base a projecting milling (11) to bear in order to lower the spinal rod (7) in the bottom of the implant (12). 6) Dispositif de serrage s'adaptant aux têtes de vis pédiculaires et crochets selon l'une quelconque des revendications précédentes, caractérisé en ce que la pièce (5) est munie d'un trou vertical (10) qui permet de prendre appui afin de réaliser une rotation de la pièce, la dite rotation s'arrête lorsque le nez (9) de la pièce vient en butée sur la tige rachidienne (7).  6) Clamping device adapted to pedicle screw heads and hooks according to any one of the preceding claims, characterized in that the part (5) is provided with a vertical hole (10) which allows to take support in order to rotate the piece, said rotation stops when the nose (9) of the piece abuts on the spinal rod (7).
FR0412004A 2004-11-12 2004-11-12 Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle Pending FR2877831A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0412004A FR2877831A1 (en) 2004-11-12 2004-11-12 Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0412004A FR2877831A1 (en) 2004-11-12 2004-11-12 Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle

Publications (1)

Publication Number Publication Date
FR2877831A1 true FR2877831A1 (en) 2006-05-19

Family

ID=36241817

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0412004A Pending FR2877831A1 (en) 2004-11-12 2004-11-12 Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle

Country Status (1)

Country Link
FR (1) FR2877831A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717067A1 (en) * 1994-03-11 1995-09-15 Huitema Jean Pierre Transverse fixing, used in surgery, for spinal column supporting rods
US5476462A (en) * 1992-06-30 1995-12-19 Zimmer, Inc. Spinal implant system
EP1064885A1 (en) * 1999-07-02 2001-01-03 Sulzer Orthopedics Ltd. Spinal fixator
WO2003096916A1 (en) * 2002-05-21 2003-11-27 Peter Metz-Stavenhagen Anchoring element for securing a rod on a vertebra
FR2853522A1 (en) * 2003-04-10 2004-10-15 Jean Pierre Huitema Pedicle screw and laminar hook clamping device, has clip including hole and two side axles sliding in respective slots of cylindrical part and taking respective circular cavities as axes to crimp spinal cord by simple rotation
FR2865925A1 (en) * 2004-02-10 2005-08-12 Is Medical Spinal rods integrating device for pedicular system, has machined parts receiving rods and with lateral drills to introduce transversal bar serving as clip to connect parts, where bar has radiated part to block rods with lower part of bar

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476462A (en) * 1992-06-30 1995-12-19 Zimmer, Inc. Spinal implant system
FR2717067A1 (en) * 1994-03-11 1995-09-15 Huitema Jean Pierre Transverse fixing, used in surgery, for spinal column supporting rods
EP1064885A1 (en) * 1999-07-02 2001-01-03 Sulzer Orthopedics Ltd. Spinal fixator
WO2003096916A1 (en) * 2002-05-21 2003-11-27 Peter Metz-Stavenhagen Anchoring element for securing a rod on a vertebra
FR2853522A1 (en) * 2003-04-10 2004-10-15 Jean Pierre Huitema Pedicle screw and laminar hook clamping device, has clip including hole and two side axles sliding in respective slots of cylindrical part and taking respective circular cavities as axes to crimp spinal cord by simple rotation
FR2865925A1 (en) * 2004-02-10 2005-08-12 Is Medical Spinal rods integrating device for pedicular system, has machined parts receiving rods and with lateral drills to introduce transversal bar serving as clip to connect parts, where bar has radiated part to block rods with lower part of bar

Similar Documents

Publication Publication Date Title
EP0971639B1 (en) Device for backbone osteosynthesis with offset intervertebral fixing rod
EP1978894B1 (en) Surgical implant with extracortical support for a ligament transplant
EP1933743B1 (en) Accessory for tensioning a flexible link
EP0392927B1 (en) Vertebral implant for osteosynthesis device
EP2874552B1 (en) Device for guiding a surgical instrument into position on a bone-anchor element including a means for realigning a link rod with the anchor element, and related system of surgical instruments
FR2948553A1 (en) ANTI-RETRACTOR DEVICE WITH DRAWERS FOR PROSTHESIS
FR2781359A1 (en) Osteosynthesis frame for spinal surgery has rod with clamps to hold cross bars with anchor screws
EP1185209A1 (en) Implant for osteosynthesis device in particular of the backbone
EP0578807A1 (en) Osteosynthesis implant assembly and fitting device
EP1480569A1 (en) Connection system between a spinal rod and a transverse bar
FR2712482A1 (en) Extradiscal intervertebral prosthesis.
FR2788958A1 (en) Tissue retractor for spinal operations with posterior access has jaws shaped to give an inner recess
EP2636815B1 (en) U-bolt for attaching a handrail top rail to a post
FR2926456A1 (en) Ligament transplant fixing device for reconstructing e.g. posterior cruciate ligament, has insertion part impacted in tunnel that is formed in bone, where insertion part has passage hole through which transplant is passed
WO2016051088A1 (en) Accessory for tensioning an elongate element
CA2330497A1 (en) Linking device for surgical instrument
FR2877831A1 (en) Spinal rod tightening device for spinal column operation field, has cavities having complete elasticity to partially rise during starting of rod tightening and lower when clip`s protrusion passes on side of vertical projection of axle
FR3026635B1 (en) ANCILLARY FOR PRE-TENSIONING A LONGILINE ELEMENT FOR ATTACHING AN IMPLANT TO A BONE MEMBER
FR2745708A1 (en) TRANSVERSE SPINNING BONDING DEVICE
FR2853522A1 (en) Pedicle screw and laminar hook clamping device, has clip including hole and two side axles sliding in respective slots of cylindrical part and taking respective circular cavities as axes to crimp spinal cord by simple rotation
FR2930720A1 (en) CONNECTION MEMBER BETWEEN A LONGITUDINAL ELEMENT OF A VERTEBRAL OSTEOSYNTHESIS DEVICE AND A VERTEBRA, A VERTEBRAL OSTEOSYNTHESIS DEVICE COMPRISING SAME AND TOOL FOR ITS POSE
FR2780630A1 (en) SURGICAL INSTRUMENT AND ITS CONNECTING DEVICE FOR FOLLOWING DETERMINED AND INDEPENDENT ANGULAR POSITIONS, FAST ASSEMBLY AND / OR DISASSEMBLY OF THE MOBILE CUTTING ELEMENT AND ITS OPERATION HANDLE
FR2948555A1 (en) Osteosynthesis intra-medullary posterior plate, has proximal part fixed on external face of bone, and distal part that is housed in medullary duct of bone, where parts are coupled by mechanical connection e.g. screw nut
WO2021144515A1 (en) Removable attachment system on a mast for a non-implantable medical device
FR2793403A1 (en) Lock for pedicular screws and laminar hooks used in spinal surgery has slotted bush gripping truncated cylindrical head on screw

Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20060731

TP Transmission of property
D3 Ip right revived