WO2016166423A1 - Screw/screwdriver system for osseous medium - Google Patents
Screw/screwdriver system for osseous medium Download PDFInfo
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- WO2016166423A1 WO2016166423A1 PCT/FR2016/000052 FR2016000052W WO2016166423A1 WO 2016166423 A1 WO2016166423 A1 WO 2016166423A1 FR 2016000052 W FR2016000052 W FR 2016000052W WO 2016166423 A1 WO2016166423 A1 WO 2016166423A1
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- Prior art keywords
- screwdriver
- screw
- thread
- rotation
- free end
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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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8645—Headless screws, e.g. ligament interference screws
-
- 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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8875—Screwdrivers, spanners or wrenches
- A61B17/8877—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit
- A61B17/8883—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit the driver bit acting on the periphery of the screw head
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8875—Screwdrivers, spanners or wrenches
- A61B17/8886—Screwdrivers, spanners or wrenches holding the screw head
- A61B17/8891—Screwdrivers, spanners or wrenches holding the screw head at its periphery
Definitions
- the present invention relates to screw-screwdriver systems for bone medium.
- the Practitioner realizes a pilot hole of a depth at least equal to the height of the head of the screw. But it is then limited to this depth and, in the case where, for example after verification by radiography, it turns out that this depth is considered insufficient, it is obliged to repeat the entire implantation process after removing the screw.
- the main object of the present invention is to provide a bone screw-screwdriver system which does not have the disadvantage of similar systems known from the prior art and which facilitates the work of orthopedic surgeons to place bone screws so that their proximal end is, according to their wishes, relatively far from the surface of the skin, while having a simpler structure that contributes to the reduction of the cost of such a system and that of surgical interventions.
- the subject of the present invention is a screw-screwdriver system for bone medium Mo, as defined in appended claim 1.
- Figures 1 to 5 show an embodiment of the screw-screwdriver system for bone medium according to the invention, Figures 1 & 3 to 5 being longitudinal sectional views of the system in four configurations taken in use, Figure 2 being a cross-sectional view of the system referenced in FIG. 1, and
- FIG. 6 represents a perspective view in another embodiment of the bone screw-screwdriver system according to the invention in a configuration that can functionally be comparable to that of FIG. 5.
- the invention relates to a screw-screwdriver system for applications in bone medium Mo, such as those mentioned in the preamble of the present description.
- the screw-screwdriver system according to the invention for bone medium Mo comprises a screw 10 defining a screw axis 12 and having two contiguous coaxial parts, namely: a proximal portion 13 and a distal portion 14, the proximal portion 13 having a section of polygonal shape, the distal portion 14 comprising a first thread 15-1, the nominal diameter at the top of the first thread having a value Sfv and the nominal diameter at the bottom of this first thread having a value Ffv.
- a screwdriver 20 essentially comprising a handle, a screwdriver rod 21 and coupling means for coupling the screw 10 with the screwdriver rod 21.
- the screwdriver rod whose one end is integral with the handle is defined along an axis of rotation 22 and its maximum transverse dimension has a value at most equal to Sfv, preferably equal to Ffv.
- the coupling means comprise an orifice 23 made in the screwdriver shaft 21 coaxially with the axis of rotation 22 and opening at least at the free end of the screwdriver shaft.
- this orifice 23 has a polygonal section substantially complementary to that of the proximal portion 13 of the screw 10 and the coupling means are arranged so that, when the screw 10 and the screwdriver rod 21 are coupled, the axes of screwing 12 and rotation 22 are substantially merged, and that the proximal portion 13 of the screw and the screwdriver rod 21 have relative to each other a degree of freedom in translation but no degree of freedom in rotation.
- a portion of the free end of the screwdriver rod 21 is substantially substantially conical truncated cone 24 substantially in the manner of a bevel, the small base 25 of the truncated cone being located on the face of this free end and has a diameter of a value at most equal to Sfv, preferably at most equal to Ffv, emphasizing that the value of the angel at the top of this truncated cone can be very small.
- the small base 25 of the truncated cone has a diameter of value at most equal to Sfv, and even more preferably, a diameter of value equal to Ffv.
- the proximal portion 13 of the screw 10 further comprises a second thread 15-2, FIG. 6, the nominal diameter at the top of this second thread having a value Sfv, the polygonal shape of this proximal portion 13 being obtained , in this embodiment, by at least one flat part 27, 28 made in at least this second thread 15-2.
- this second thread 15-2 is identical to the first thread 15-1, these first and second threads being furthermore made so that they are continuously screwed to one another.
- the bone screw-screwdriver system Mo comprises a screw 10 defining a screw axis 12 and comprising two coaxial contiguous parts, respectively a proximal portion 13 and a distal portion 14, the proximal portion 13 having a polygonal section, the distal portion 14 including a first thread 15-1 whose nominal diameter at the thread tip has a value Sfv and whose nominal diameter at the bottom of the thread has a value Ffv, a screwdriver 20 comprising a handle, a screwdriver rod 21 integral, at one of its ends, with the handle, this screwdriver rod being defined along an axis of rotation 22 and its maximum transverse dimension having a value at most equal to Sfv , and means for coupling the screw 10 with the screwdriver shaft 21, these coupling means comprising an orifice 23 made in
- the free end of the screwdriver rod 21 has a diameter of value at most equal to Ffv, preferably equal, and the orifice 23 consists of a slot 40 passing through the free end of the screwdriver rod 21 opening on the lateral surface of this free end.
- the system further comprises means for maintaining coaxial axes of rotation 22 and screwing 12 when the screwdriver rod 21 and the screw 10 are translatable relative to each other when they are both subjected to a rotational movement for screwing screw 10 into the bone medium Mo.
- These holding means may be of different shapes but, quite advantageously, they consist of a pin Br, of course with a diameter much smaller than Ffv, which is integral with the free end of the rod.
- the pin Br is furthermore integral with the free end of the screwdriver rod 21 so that its axis and the screwing and rotation axes 22 and 22 are coaxial so that the pin is able to be plugged into the breakthrough made in FIG. screw 10 when screwing the latter into the bone medium Mo and so that it can slide in this breakthrough.
- This pin also has the role of guiding the screw during its introduction and its screwing into the bone, thus allowing the practitioner to be certain that it will certainly play its role of liaison between, for example, two portions fractured bone.
- the screwdriver 20 is disposable, for example made of one of the following materials: metal material, plastic material.
- the screw-driver system according to the invention operates and is used as described below with reference to FIGS. 1 to 6, more particularly in its embodiment according to FIG.
- the screw 10 enters the bone medium Mo by making a self-tapping breakthrough and the small base 25 approaches the face Mof of this middle Mo up against it, figure 3.
- the free end of the screwdriver rod 21 is shaped cone frustum 24, after being abutted against the face Mof of the bone medium, this end penetrates slightly into the bone medium by performing a milling, figure 4 and 5, the depth of this milling being a function of the angle at the top of the truncated cone.
- edges 41, 42 of the slot 40 favor the realization of this milling, acting in the bone medium Mo such as "knives” or a conical end a drill bit.
- the Practitioner is certain that the free end of the proximal portion 13 of the screw is in the bone medium Mo and removed from the face Mof of this bone medium, FIG. 5 in accordance with the aims of the invention set forth in the preamble of the present description.
- the value of the withdrawal of the free end of the proximal portion 13 of the screw is a function in particular of the value of the vertex angle of the truncated cone and the friability of the bone medium.
- the practitioner will therefore choose, in a range of screwdriver rods according to the invention that he will have at his disposal, the one that has the truncated cone adapted to obtain the desired result. .
Abstract
The system according to the invention comprises a screw 10 of axis 12 having a proximal part 13 of polygonal shape and a distal part 14 with a thread 15-1 of diameter Sfv, a screwdriver comprising a handle and a screwdriver rod 21 of axis 22, of which the transverse dimension has a value at most equal to Sfv, an orifice 23 formed in the free end of the rod 21 and having a polygonal cross section matching that of the part 13, means for coupling the screw 10 to the screwdriver rod 21, these coupling means comprising a pin Br rigidly connected to the free end of the screwdriver rod 21 and a bore formed in the screw 10 along its screwing axis, with a cross section substantially matching that of the pin. Use for reducing bone fractures, particularly in the hands and feet.
Description
SYSTEME VIS-TOURNEVIS POUR MILIEU OSSEUX VIS-SCREWDRIVER SYSTEM FOR BONE MEDIA
La présente invention concerne les systèmes vis-tournevis pour milieu osseux. The present invention relates to screw-screwdriver systems for bone medium.
II est connu que, dans le domaine de la chirurgie osseuse, il est souvent fait appel, notamment lors de la réduction de fractures, à des vis pour solidariser des os entre eux. It is known that, in the field of bone surgery, it is often used, particularly during the reduction of fractures, screws to secure bones together.
Or, plus particulièrement, mais non exclusivement, dans le cas de la chirurgie orthopédique de la main ou du pied, il est impératif que les têtes des vis implantées n'affleurent pas à la surface des os, afin d'éviter notamment de blesser la peau, les chairs, les muscles, etc. However, more particularly, but not exclusively, in the case of orthopedic surgery of the hand or foot, it is imperative that the heads of the implanted screws do not flop on the surface of the bones, in particular to avoid injuring the skin, flesh, muscles, etc.
Dans ce but, avant d'implanter une telle vis dans un os, le Praticien réalise un avant-trou d'une profondeur au moins égale à la hauteur de la tête de la vis. Mais il est alors limité à cette profondeur et, dans le cas où, par exemple après vérification par radiographie, il s'avère que cette profondeur est jugée insuffisante, il est obligé de recommencer tout le processus d'implantation après avoir retiré la vis. For this purpose, before implanting such a screw in a bone, the Practitioner realizes a pilot hole of a depth at least equal to the height of the head of the screw. But it is then limited to this depth and, in the case where, for example after verification by radiography, it turns out that this depth is considered insufficient, it is obliged to repeat the entire implantation process after removing the screw.
Une telle manipulation est très gênante pour le Praticien, et surtout néfaste pour le patient car elle contribue à allonger le temps de l'intervention avec toutes les conséquences et obligations qui en découlent. Such manipulation is very inconvenient for the practitioner, and especially harmful for the patient because it helps to lengthen the time of the intervention with all the consequences and obligations that result.
Des moyens pour mettre en œuvre cette technique sont connus, par exemple ceux décrits dans le US 2014/107712. Mais ils ne répondent pas notamment au problème de l'enfoncement en profondeur, en milieu osseux, de l'extrémité proximale des vis' osseuses. Means for implementing this technique are known, for example those described in US 2014/107712. But they do not respond particularly depressing problem in depth, bony middle of the proximal end of the screws' bone.
Aussi, la présente invention a-t-elle essentiellement pour but de réaliser un système vis-tournevis pour milieu osseux qui ne présente pas l'inconvénient des systèmes similaires connus de l'art antérieur et qui facilite le travail des chirurgiens orthopédistes pour mettre en place des vis osseuses de façon que leur extrémité proximale soit, selon leur souhait, relativement assez éloignée de la surface de la peau, tout en ayant une structure des plus simples qui concourt à la réduction du coût de revient d'un tel système et de celui des interventions chirurgicales.
Plus précisément, la présente invention a pour objet un système vis- tournevis pour milieu osseux Mo, tel que défini dans la revendication 1 annexée. Also, the main object of the present invention is to provide a bone screw-screwdriver system which does not have the disadvantage of similar systems known from the prior art and which facilitates the work of orthopedic surgeons to place bone screws so that their proximal end is, according to their wishes, relatively far from the surface of the skin, while having a simpler structure that contributes to the reduction of the cost of such a system and that of surgical interventions. More specifically, the subject of the present invention is a screw-screwdriver system for bone medium Mo, as defined in appended claim 1.
D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante donnée en regard des dessins annexés à titre illustratif mais nullement limitatif, dans lesquels : Other features and advantages of the present invention will become apparent from the following description given with reference to the accompanying drawings, by way of illustration but in no way limiting, in which:
Les figures 1 à 5 représentent un mode de réalisation du système vis- tournevis pour milieu osseux selon l'invention, les figures 1 & 3 à 5 étant des vues en coupe longitudinale du système dans quatre configurations prises lors de son utilisation, la figure 2 étant une vue en coupe transversale du système référencée sur la figure 1 , et Figures 1 to 5 show an embodiment of the screw-screwdriver system for bone medium according to the invention, Figures 1 & 3 to 5 being longitudinal sectional views of the system in four configurations taken in use, Figure 2 being a cross-sectional view of the system referenced in FIG. 1, and
La figure 6 représente une vue en perspective cavalière d'un autre mode de réalisation préféré du système vis-tournevis pour milieu osseux selon l'invention dans une configuration qui peut fonctionnellement être comparable à celle selon la figure 5. FIG. 6 represents a perspective view in another embodiment of the bone screw-screwdriver system according to the invention in a configuration that can functionally be comparable to that of FIG. 5.
Il est tout d'abord précisé que, dans la présente description, si l'adverbe "sensiblement" est associé à un qualificatif d'un moyen donné, ce qualificatif doit être compris au sens strict ou approché. It is first of all specified that, in the present description, if the adverb "substantially" is associated with a qualifier of a given means, this qualifier must be understood in the strict sense or approached.
L'invention concerne un système vis-tournevis pour des applications en milieu osseux Mo, comme celles qui ont été évoquées au préambule de la présente description. The invention relates to a screw-screwdriver system for applications in bone medium Mo, such as those mentioned in the preamble of the present description.
Le système vis-tournevis selon l'invention pour milieu osseux Mo, comporte une vis 10 définissant un axe de vissage 12 et comportant deux parties contiguës coaxiales, à savoir : une partie proximale 13 et une partie distale 14, la partie proximale 13 ayant une section de forme polygonale, la partie distale 14 comprenant un premier filetage 15-1 , le diamètre nominal au sommet de ce premier filetage ayant une valeur Sfv et le diamètre nominal au fond de ce premier filetage ayant une valeur Ffv. The screw-screwdriver system according to the invention for bone medium Mo comprises a screw 10 defining a screw axis 12 and having two contiguous coaxial parts, namely: a proximal portion 13 and a distal portion 14, the proximal portion 13 having a section of polygonal shape, the distal portion 14 comprising a first thread 15-1, the nominal diameter at the top of the first thread having a value Sfv and the nominal diameter at the bottom of this first thread having a value Ffv.
Il comporte en outre un tournevis 20 comprenant essentiellement un manche, une tige de tournevis 21 et des moyens de couplage pour coupler la vis 10 avec la tige de tournevis 21.
La tige de tournevis dont une extrémité est solidaire du manche est définie selon un axe de rotation 22 et sa dimension transversale maximale a une valeur au plus égale à Sfv, de préférence égale à Ffv. It further comprises a screwdriver 20 essentially comprising a handle, a screwdriver rod 21 and coupling means for coupling the screw 10 with the screwdriver rod 21. The screwdriver rod whose one end is integral with the handle is defined along an axis of rotation 22 and its maximum transverse dimension has a value at most equal to Sfv, preferably equal to Ffv.
Quant aux moyens de couplage, ils comprennent un orifice 23 réalisé dans la tige de tournevis 21 de façon coaxiale avec l'axe de rotation 22 et débouchant au moins à l'extrémité libre de la tige de tournevis. As for the coupling means, they comprise an orifice 23 made in the screwdriver shaft 21 coaxially with the axis of rotation 22 and opening at least at the free end of the screwdriver shaft.
De plus, cet orifice 23 présente une section polygonale sensiblement complémentaire de celle de la partie proximale 13 de la vis 10 et les moyens de couplage sont agencés de façon que, lorsque la vis 10 et la tige de tournevis 21 sont couplées, les axes de vissage 12 et de rotation 22 soient sensiblement confondus, et que la partie proximale 13 de la vis et la tige de tournevis 21 présentent l'une par rapport à l'autre un degré de liberté en translation mais aucun degré de liberté en rotation. In addition, this orifice 23 has a polygonal section substantially complementary to that of the proximal portion 13 of the screw 10 and the coupling means are arranged so that, when the screw 10 and the screwdriver rod 21 are coupled, the axes of screwing 12 and rotation 22 are substantially merged, and that the proximal portion 13 of the screw and the screwdriver rod 21 have relative to each other a degree of freedom in translation but no degree of freedom in rotation.
Selon une caractéristique de la présente invention, une portion de l'extrémité libre de la tige de tournevis 21 est conformée sensiblement en tronc de cône 24 sensiblement régulier à la façon d'un biseau, la petite base 25 de ce tronc de cône étant située sur la face de cette extrémité libre et présente un diamètre d'une valeur au plus égale à Sfv, de préférence au plus égale à Ffv, en soulignant que la valeur de l'ange au sommet de ce tronc de cône peut être très faible. According to a feature of the present invention, a portion of the free end of the screwdriver rod 21 is substantially substantially conical truncated cone 24 substantially in the manner of a bevel, the small base 25 of the truncated cone being located on the face of this free end and has a diameter of a value at most equal to Sfv, preferably at most equal to Ffv, emphasizing that the value of the angel at the top of this truncated cone can be very small.
De façon préférentielle, la petite base 25 du tronc de cône a un diamètre de valeur au plus égale à Sfv, et encore plus préférentiellement, un diamètre de valeur égale à Ffv. Preferably, the small base 25 of the truncated cone has a diameter of value at most equal to Sfv, and even more preferably, a diameter of value equal to Ffv.
Selon une réalisation avantageuse, la partie proximale 13 de la vis 10 comporte en outre un second filetage 15-2, figure 6, le diamètre nominal au sommet de ce second filetage ayant une valeur Sfv, la forme polygonale de cette partie proximale 13 étant obtenue, dans ce mode de réalisation, par au moins un méplat 27, 28 réalisé dans au moins ce second filetage 15-2. According to an advantageous embodiment, the proximal portion 13 of the screw 10 further comprises a second thread 15-2, FIG. 6, the nominal diameter at the top of this second thread having a value Sfv, the polygonal shape of this proximal portion 13 being obtained , in this embodiment, by at least one flat part 27, 28 made in at least this second thread 15-2.
De façon préférentielle, ce second filetage 15-2 est identique au premier filetage 15-1 , ces premier et second filetages étant en outre réalisés de façon qu'ils soient en continu de vissage l'un de l'autre. Preferably, this second thread 15-2 is identical to the first thread 15-1, these first and second threads being furthermore made so that they are continuously screwed to one another.
Dans le mode de réalisation selon les figures 1 à 5, l'orifice 23 réalisé dans une extrémité libre de la tige de tournevis 21 est un orifice borgne.
Cependant, selon le mode de réalisation encore plus préférentiel comme évoqué sur la figure 6, le système vis-tournevis pour milieu osseux Mo comporte une vis 10 définissant un axe de vissage 12 et comportant deux parties contiguës coaxiales, respectivement une partie proximale 13 et une partie distale 14, la partie proximale 13 ayant une section de forme polygonale, la partie distale 14 comprenant un premier filetage 15-1 dont le diamètre nominal au sommet de filet a une valeur Sfv et dont le diamètre nominal au fond de filet a une valeur Ffv, un tournevis 20 comprenant un manche, une tige de tournevis 21 solidaire, par une de ses extrémités, du manche, cette tige de tournevis étant définie selon un axe de rotation 22 et sa dimension transversale maximale ayant une valeur au plus égale à Sfv, et des moyens pour coupler la vis 10 avec la tige de tournevis 21 , ces moyens de couplage comprenant un orifice 23 réalisé dans la tige de tournevis 21 de façon coaxiale avec l'axe de rotation 22 et débouchant au moins à l'extrémité libre de cette tige de tournevis, cet orifice ayant en outre une section polygonale sensiblement complémentaire de celle de la partie proximale 13 de la vis, ces moyens de couplage étant en outre agencés de façon que, lorsque la vis 10 et la tige de tournevis 21 sont couplées, les axes de vissage 12 et de rotation 22 soient sensiblement confondus, et que la partie proximale 13 de la vis et la tige de tournevis 21 présentent l'une par rapport à l'autre un degré de liberté en translation et aucun degré de liberté en rotation. In the embodiment according to Figures 1 to 5, the orifice 23 formed in a free end of the screwdriver shaft 21 is a blind hole. However, according to the even more preferred embodiment as mentioned in FIG. 6, the bone screw-screwdriver system Mo comprises a screw 10 defining a screw axis 12 and comprising two coaxial contiguous parts, respectively a proximal portion 13 and a distal portion 14, the proximal portion 13 having a polygonal section, the distal portion 14 including a first thread 15-1 whose nominal diameter at the thread tip has a value Sfv and whose nominal diameter at the bottom of the thread has a value Ffv, a screwdriver 20 comprising a handle, a screwdriver rod 21 integral, at one of its ends, with the handle, this screwdriver rod being defined along an axis of rotation 22 and its maximum transverse dimension having a value at most equal to Sfv , and means for coupling the screw 10 with the screwdriver shaft 21, these coupling means comprising an orifice 23 made in the screwdriver shaft 21 coaxially with the axis of rotation 22 and opening at least at the free end of this screwdriver rod, this orifice further having a polygonal section substantially complementary to that of the proximal portion 13 of the screw, these coupling means being furthermore arranged so that when the screw 10 and the screwdriver shaft 21 are coupled, the screwing and rotational axes 22 are substantially merged, and the proximal portion 13 of the screw and the screwdriver shaft 21 relative to the other a degree of freedom in translation and no degree of freedom in rotation.
Selon une caractéristique de la présente invention, l'extrémité libre de la tige de tournevis 21 présente un diamètre de valeur au plus égale à Ffv, de préférence égale, et l'orifice 23 est constitué d'une fente 40 traversant de part en part l'extrémité libre de la tige de tournevis 21 en s'ouvrant sur la surface latérale de cette extrémité libre. According to a feature of the present invention, the free end of the screwdriver rod 21 has a diameter of value at most equal to Ffv, preferably equal, and the orifice 23 consists of a slot 40 passing through the free end of the screwdriver rod 21 opening on the lateral surface of this free end.
Dans ce cas, il est très avantageux que le système comporte en outre des moyens pour maintenir coaxiaux les axes de rotation 22 et de vissage 12 quand la tige de tournevis 21 et la vis 10 se translatent l'une par rapport à l'autre lorsqu'elles sont soumises toutes les deux à un mouvement de rotation pour le vissage de la vis 10 dans le milieu osseux Mo.
Ces moyens de maintien peuvent être de différentes formes mais, de façon tout à fait avantageuse, ils sont constitués d'une broche Br, bien entendu d'un diamètre très inférieur à Ffv, qui est solidaire de l'extrémité libre de la tige de tournevis 21 , et d'une percée réalisée dans la vis 10 selon son axe de vissage, cette percée ayant une section sensiblement complémentaire de celle de la broche de façon que cette dernière soit apte à y être enfichée sans jeu notable. In this case, it is very advantageous that the system further comprises means for maintaining coaxial axes of rotation 22 and screwing 12 when the screwdriver rod 21 and the screw 10 are translatable relative to each other when they are both subjected to a rotational movement for screwing screw 10 into the bone medium Mo. These holding means may be of different shapes but, quite advantageously, they consist of a pin Br, of course with a diameter much smaller than Ffv, which is integral with the free end of the rod. screwdriver 21, and a breakthrough made in the screw 10 along its screw axis, this breakthrough having a section substantially complementary to that of the spindle so that the latter is adapted to be plugged without significant play.
La broche Br est en outre solidaire de l'extrémité libre de la tige de tournevis 21 de façon que son axe et les axes de vissage 12 et de rotation 22 soient coaxiaux pour que la broche soit apte à être enfichée dans la percée réalisée dans la vis 10 lors du vissage de cette dernière dans le milieu osseux Mo et pour qu'elle puisse glisser dans cette percée. The pin Br is furthermore integral with the free end of the screwdriver rod 21 so that its axis and the screwing and rotation axes 22 and 22 are coaxial so that the pin is able to be plugged into the breakthrough made in FIG. screw 10 when screwing the latter into the bone medium Mo and so that it can slide in this breakthrough.
De cette façon, lorsque le vissage en profondeur de la vis est obtenu au souhait du praticien, la tige de tournevis 21 et la broche Br peuvent être retirées ensemble par simple traction sur la tige de tournevis (éventuellement via le manche). Cette seule opération favorise grandement le travail du praticien, et surtout le sécurise car elle l'assure que la broche Br n'est pas restée in situ, par exemple par inadvertance, après l'opération. In this way, when the screwing in depth of the screw is obtained at the discretion of the practitioner, the screwdriver rod 21 and the pin Br can be removed together by simply pulling on the screwdriver rod (possibly via the handle). This single operation greatly favors the work of the practitioner, and especially secures because it ensures that the Br pin has not remained in situ, for example inadvertently after the operation.
Cette broche a également pour rôle de guider la vis lors de son introduction et de son vissage dans l'os, permettant ainsi au Praticien d'être certain qu'elle va jouer à coup sûr son rôle de liaison entre, par exemple, deux portions de l'os fracturé. This pin also has the role of guiding the screw during its introduction and its screwing into the bone, thus allowing the practitioner to be certain that it will certainly play its role of liaison between, for example, two portions fractured bone.
Il est en outre bien entendu préférable et avantageux que le tournevis 20 soit à usage unique, par exemple réalisé dans l'un des matériaux suivants : matériau métallique, matériau plastique. It is of course also preferable and advantageous that the screwdriver 20 is disposable, for example made of one of the following materials: metal material, plastic material.
Le système vis-tournevis selon l'invention fonctionne et s'utilise comme décrit ci-dessous en regard des figures 1 à 6, plus particulièrement dans son mode de réalisation selon la figure 6. The screw-driver system according to the invention operates and is used as described below with reference to FIGS. 1 to 6, more particularly in its embodiment according to FIG.
Il est par exemple supposé qu'il est prévu, pour réunir deux os ou deux portions d'un os fracturé, d'implanter une vis comme celle décrite dans le FR2855391 au nom du Demandeur et commercialisée par la Société AREX sous la Marque SCRU 2®.
Pour ce faire, le Praticien commence par accoupler la vis 10 avec la tige de tournevis comme illustré sur la figure 1 . It is for example assumed that it is intended, for joining two bones or two portions of a fractured bone, to implant a screw such as that described in FR2855391 in the name of the Applicant and marketed by the AREX Company under the SCRU Mark 2 ® . To do this, the Practitioner begins by coupling the screw 10 with the screwdriver shaft as shown in FIG.
Puis, en soutenant cet ensemble, par exemple manuellement, il commence à visser la vis 10 dans le milieu osseux Mo en tournant la tige de tournevis 21 , par exemple au moyen d'un manche ou analogue, manuellement ou avec une visseuse automatique. Then, by supporting this assembly, for example manually, he begins to screw the screw 10 in the bone medium Mo by turning the screwdriver shaft 21, for example by means of a handle or the like, manually or with an automatic screwdriver.
Au fur et à mesure que la tige de tournevis tourne autour de son axe de rotation 22, la vis 10 pénètre dans le milieu osseux Mo en y réalisant une percée par auto-taraudage et la petite base 25 s'approche de la face Mof de ce milieu Mo jusqu'à buter contre elle, figure 3. As the screwdriver shaft rotates about its axis of rotation 22, the screw 10 enters the bone medium Mo by making a self-tapping breakthrough and the small base 25 approaches the face Mof of this middle Mo up against it, figure 3.
Le Praticien continuant à tourner la tige de tournevis, la vis 10 continue à pénétrer dans le milieu osseux. Corrélativement, comme la petite base 25 est arrêtée par la face Mof de ce milieu osseux et comme il existe, entre la tige de tournevis et la vis, seulement un degré de liberté en translation, la tige de tournevis 21 reste sensiblement fixe en butée contre la face Mof alors que la vis 10 continue à avancer dans le milieu osseux Mo (vers la droite selon la représentation des figures 1 à 6) jusqu'à se désolidariser de la tige de tournevis, figures 5 et 6. As the practitioner continues to turn the screwdriver shaft, the screw 10 continues to penetrate the bone medium. Correlatively, since the small base 25 is stopped by the face Mof of this bone medium and as it exists, between the screwdriver shaft and the screw, only a degree of freedom in translation, the screwdriver shaft 21 remains substantially fixed in abutment against the face Mof while the screw 10 continues to advance in the bone medium Mo (to the right according to the representation of Figures 1 to 6) to disengage from the screwdriver shaft, Figures 5 and 6.
Cependant, avantageusement comme l'extrémité libre de la tige de tournevis 21 est conformée en tronc de cône 24, après être venue en butée contre la face Mof du milieu osseux, cette extrémité pénètre légèrement dans le milieu osseux en y réalisant un fraisage, figure 4 et 5, la profondeur de ce fraisage étant fonction de l'angle au sommet du tronc de cône. However, advantageously as the free end of the screwdriver rod 21 is shaped cone frustum 24, after being abutted against the face Mof of the bone medium, this end penetrates slightly into the bone medium by performing a milling, figure 4 and 5, the depth of this milling being a function of the angle at the top of the truncated cone.
Il est à noter en outre que les arêtes 41 , 42 de la fente 40, dans le mode de réalisation préféré selon la figure 6, favorisent la réalisation de ce fraisage, agissant dans le milieu osseux Mo comme des "couteaux" ou une extrémité conique d'une mèche de perçage. It should be noted further that the edges 41, 42 of the slot 40, in the preferred embodiment according to FIG. 6, favor the realization of this milling, acting in the bone medium Mo such as "knives" or a conical end a drill bit.
Lorsque la tige de tournevis 21 et la vis 10 sont désolidarisées, le Praticien est certain que l'extrémité libre de la partie proximale 13 de la vis est dans le milieu osseux Mo et en retrait de la face Mof de ce milieu osseux, figure 5, conformément aux buts de l'invention exposés au préambule de la présente description.
En fait, la valeur du retrait de l'extrémité libre de la partie proximale 13 de la vis est fonction notamment de la valeur de l'angle au sommet du tronc de cône et de la friabilité du milieu osseux. En fonction de la valeur du retrait qu'il souhaite obtenir, le Praticien choisira donc, dans une gamme de tiges de tournevis selon l'invention qu'il aura à sa disposition, celle qui a le tronc de cône adapté pour obtenir le résultat recherché.
When the screwdriver rod 21 and the screw 10 are disengaged, the Practitioner is certain that the free end of the proximal portion 13 of the screw is in the bone medium Mo and removed from the face Mof of this bone medium, FIG. 5 in accordance with the aims of the invention set forth in the preamble of the present description. In fact, the value of the withdrawal of the free end of the proximal portion 13 of the screw is a function in particular of the value of the vertex angle of the truncated cone and the friability of the bone medium. According to the value of the withdrawal that he wishes to obtain, the practitioner will therefore choose, in a range of screwdriver rods according to the invention that he will have at his disposal, the one that has the truncated cone adapted to obtain the desired result. .
Claims
1. Système vis-tournevis pour milieu osseux (Mo), comportant : 1. Screw-screwdriver system for bone medium (MB), comprising:
• une vis (10) définissant un axe de vissage (12) et comportant deux parties contiguës coaxiales, respectivement une partie proximale (13) et une partie distale (14), la partie proximale (13) ayant une section de forme polygonale, la partie distale (14) comprenant un premier filetage (15-1 ), le diamètre nominal au sommet de ce premier filetage ayant une valeur Sfv et le diamètre nominal au fond de ce premier filetage ayant une valeur Ffv, « un tournevis (20) comprenant un manche, une tige de tournevis (21 ) solidaire, par une de ses extrémités, du dit manche, ladite tige de tournevis étant définie selon un axe de rotation (22) et sa dimension transversale maximale ayant une valeur au plus égale à Sfv, et des moyens pour coupler la vis (10) avec ladite tige de tournevis (21 ), ces moyens de couplage comprenant un orifice (23) réalisé dans ladite tige de tournevis (21 ) de façon coaxiale avec ledit axe de rotation (22) et débouchant au moins à l'extrémité libre de la tige de tournevis, cet orifice (23) ayant une section polygonale sensiblement complémentaire de celle de ladite partie proximale (13) de la vis (10), ces dits moyens de couplage étant en outre agencés de façon que, lorsque la vis (10) et la tige de tournevis (21 ) sont couplées, les axes de vissage (12) et de rotation (22) soient sensiblement confondus et que la partie proximale (13) de la vis et la tige de tournevis (21 ) présentent l'une par rapport à l'autre un degré de liberté en translation et aucun degré de liberté en rotation, caractérisé par le fait que l'extrémité libre de ladite tige de tournevis (21 ) présente un diamètre de valeur au plus égale à Ffv et que ledit orifice (23) est constitué d'une fente (40) traversant de part en part ladite extrémité libre de la tige de tournevis (21 ) en s'ouvrant sur la surface latérale de cette extrémité libre. • a screw (10) defining a screw axis (12) and comprising two contiguous portions coaxial, respectively a proximal portion (13) and a distal portion (14), the proximal portion (13) having a polygonal section, distal portion (14) comprising a first thread (15-1), the nominal diameter at the top of this first thread having a value Sfv and the nominal diameter at the bottom of this first thread having a value Ffv, "a screwdriver (20) comprising a handle, a screwdriver rod (21) integral at one of its ends with said handle, said screwdriver shaft being defined along an axis of rotation (22) and its maximum transverse dimension having a value at most equal to Sfv, and means for coupling the screw (10) with said screwdriver shaft (21), said coupling means comprising an orifice (23) formed in said screwdriver shaft (21) coaxially with said axis of rotation (22) and opening at least at the free end of the screwdriver shaft, said orifice (23) having a polygonal section substantially complementary to that of said proximal portion (13) of the screw (10), said coupling means being furthermore arranged so that, when the screw (10) and the screwdriver shaft (21) are coupled, the screwing (12) and rotation (22) axes are substantially coincidental and that the proximal portion (13) of the screw and the screwdriver shaft (21) have one with respect to the other a degree of freedom in translation and no degree of freedom in rotation, characterized in that the free end of said screwdriver shaft (21) has a diameter of value at most equal to Ffv and that said orifice (23) consists of a slot (40) passing right through said free end of the screwdriver rod (21) opening on the lateral surface of this free end.
2. Système selon la revendication 1 , caractérisé par le fait qu'il comporte des moyens pour maintenir coaxiaux les axes de rotation (22) et de vissage (12) quand la tige de tournevis (21 ) et la vis (10) se translatent l'une par rapport à l'autre lorsqu'elles sont soumises toutes lés deux à un
mouvement de rotation pour le vissage de la vis (10) dans le milieu osseux (Mo). 2. System according to claim 1, characterized in that it comprises means for maintaining coaxial axes of rotation (22) and screwing (12) when the screwdriver shaft (21) and the screw (10) are translated relative to each other when both are subject to a rotational movement for screwing the screw (10) into the bone medium (MB).
3. Système selon la revendication 3, caractérisé par le fait que les moyens pour maintenir coaxiaux les axes de rotation (22) et de vissage (12) sont constitués d'une broche (Br) solidaire de l'extrémité libre de la tige de tournevis (21 ), et d'une percée réalisée dans la vis (10) selon son axe de vissage d'une section sensiblement complémentaire de celle de ladite broche, la broche étant agencée sur l'extrémité libre de la tige de tournevis de façon que les axes de vissage (12) et de rotation (22) soient coaxiaux pour que ladite broche soit apte à être enfichée dans ladite percée lors du vissage de la vis (10) dans le milieu osseux. 3. System according to claim 3, characterized in that the means for maintaining coaxial axes of rotation (22) and screwing (12) consist of a pin (Br) integral with the free end of the rod of screwdriver (21), and a breakthrough made in the screw (10) along its axis of screwing a section substantially complementary to that of said pin, the pin being arranged on the free end of the screwdriver rod so that the screwing axes (12) and rotation (22) are coaxial so that said pin is adapted to be plugged into said piercing when screwing the screw (10) in the bone medium.
4. Système vis-tournevis pour milieu osseux (Mo), comportant : 4. Screw-screwdriver system for bone medium (MB), comprising:
• une vis ( 0) définissant un axe de vissage (12) et comportant deux parties contiguës coaxiales, respectivement une partie proximale (13) et une partie distale (14), la partie proximale (13) ayant une section de forme polygonale, la partie distale (14) comprenant un premier filetage (15-1 ), le diamètre nominal au sommet de ce premier filetage ayant une valeur Sfv et le diamètre nominal au fond de ce premier filetage ayant une valeur Ffv, A screw (0) defining a screw axis (12) and having two contiguous coaxial portions, a proximal portion (13) and a distal portion (14), respectively, the proximal portion (13) having a polygonal cross-section; distal portion (14) comprising a first thread (15-1), the nominal diameter at the top of this first thread having a value Sfv and the nominal diameter at the bottom of this first thread having a value Ffv,
• un tournevis (20) comprenant un manche, une tige de tournevis (21 ) solidaire, par une de ses extrémités, du dit manche, et définie selon un axe de rotation (22) et des moyens pour coupler la vis (10) avec ladite tige de tournevis (21 ), ces moyens de couplage comprenant un orifice (23) réalisé dans l'extrémité libre de ladite tige de tournevis (21 ) de façon coaxiale avec ledit axe dé rotation (22) et débouchant au moins à cette extrémité libre, cet orifice ayant en outre une section polygonale sensiblement complémentaire de celle de ladite partie proximale (13), ces dits moyens de couplage étant en outre agencés de façon que, lorsque la vis (10) et la tige de tournevis (21 ) sont couplées, les axes de vissage (12) et de rotation (22) soient sensiblement confondus, et que la partie proximale (13) et la tige de tournevis (21 ) présentent l'une par rapport à l'autre un degré de liberté en translation et aucun degré de liberté en rotation, une portion de l'extrémité libre de ladite tige de tournevis (21 ) étant conformée sensiblement en tronc de cône (24) sensiblement régulier à la façon d'un biseau, la petite base (25)
du dit tronc de cône étant située sur la face de cette extrémité libre, caractérisé par le fait que la petite base (25) du dit tronc de cône a un diamètre de valeur au plus égale à Sfv. A screwdriver (20) comprising a handle, a screwdriver rod (21) integral, at one of its ends, with said handle, and defined along an axis of rotation (22) and means for coupling the screw (10) with said screwdriver shaft (21), said coupling means comprising an orifice (23) formed in the free end of said screwdriver shaft (21) coaxially with said axis of rotation (22) and opening at least at this end free, this orifice further having a polygonal section substantially complementary to that of said proximal portion (13), said coupling means being furthermore arranged so that when the screw (10) and the screwdriver rod (21) are coupled, the screwing axes (12) and rotation (22) are substantially merged, and that the proximal portion (13) and the screwdriver shaft (21) have a degree of freedom with respect to each other. translation and no degree of freedom in rotation, a portion of the ext free end of said screwdriver shaft (21) being substantially substantially cone-shaped (24) substantially regular in the manner of a bevel, the small base (25) said truncated cone being located on the face of this free end, characterized in that the small base (25) of said truncated cone has a diameter of value at most equal to Sfv.
5. Système selon la revendication 4, caractérisé par le fait que la petite base (25) du dit tronc de cône a un diamètre de valeur Ffv. 5. System according to claim 4, characterized in that the small base (25) of said truncated cone has a diameter of Ffv value.
6. Système selon l'une des revendications 4 et 5, caractérisé par le fait que ladite partie proximale (13) comporte un second filetage (15-2), le diamètre nominal au sommet de ce second filetage ayant une valeur Sfv, la forme polygonale de cette partie proximale (13) étant obtenue par au moins un méplat (27, 28) réalisé sur au moins ledit second filetage (15-2). 6. System according to one of claims 4 and 5, characterized in that said proximal portion (13) comprises a second thread (15-2), the nominal diameter at the top of the second thread having a value Sfv, the shape polygonal of this proximal portion (13) being obtained by at least one flat (27, 28) formed on at least said second thread (15-2).
7. Système selon la revendication 6, caractérisé par le fait que ledit second filetage (15-2) est identique au premier filetage (15-1), lesdits premier et second filetages étant en continu l'un de l'autre. 7. System according to claim 6, characterized in that said second thread (15-2) is identical to the first thread (15-1), said first and second threads being continuously from one another.
8. Système selon l'une des revendications précédentes, caractérisé par le fait que ledit tournevis (20) est à usage unique. 8. System according to one of the preceding claims, characterized in that said screwdriver (20) is disposable.
9. Système selon la revendication 8, caractérisé par le fait que ladite tige de tournevis est réalisée dans l'un des matériaux suivants : matériau métallique, matériau plastique.
9. System according to claim 8, characterized in that said screwdriver rod is made of one of the following materials: metal material, plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16718387.0A EP3282985A1 (en) | 2015-04-13 | 2016-03-18 | Screw/screwdriver system for osseous medium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1500754 | 2015-04-13 | ||
| FR1500754A FR3034647A1 (en) | 2015-04-13 | 2015-04-13 | VIS-SCREWDRIVER SYSTEM FOR BONE MEDIA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016166423A1 true WO2016166423A1 (en) | 2016-10-20 |
Family
ID=53269614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2016/000052 WO2016166423A1 (en) | 2015-04-13 | 2016-03-18 | Screw/screwdriver system for osseous medium |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3282985A1 (en) |
| FR (1) | FR3034647A1 (en) |
| WO (1) | WO2016166423A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354299A (en) * | 1992-12-07 | 1994-10-11 | Linvatec Corporation | Method of revising a screw in a tunnel |
| WO1997006731A1 (en) * | 1995-08-14 | 1997-02-27 | Mitek Surgical Products, Inc. | Suture anchor assembly |
| WO2000059389A1 (en) * | 1999-04-02 | 2000-10-12 | Osteotech, Inc. | Surgical bone screw |
| US6187008B1 (en) * | 1999-07-07 | 2001-02-13 | Bristol-Myers Squibb | Device for temporarily fixing bones |
| EP1110510A1 (en) * | 1999-12-23 | 2001-06-27 | Karl Storz GmbH & Co. KG | Screw driven non-centrally |
| FR2855391A1 (en) | 2003-05-30 | 2004-12-03 | Xavier Renard | AUTO COMPRESSIVE SCREW TO JOIN TWO PORTIONS OF BONE |
| US20140107712A1 (en) | 2012-10-12 | 2014-04-17 | Smith & Nephew, Inc. | Fusion implant |
| US20140194937A1 (en) * | 2013-01-04 | 2014-07-10 | The General Hospital Corporation Dba Massachusetts General Hospital | Fastener |
-
2015
- 2015-04-13 FR FR1500754A patent/FR3034647A1/en not_active Withdrawn
-
2016
- 2016-03-18 EP EP16718387.0A patent/EP3282985A1/en not_active Withdrawn
- 2016-03-18 WO PCT/FR2016/000052 patent/WO2016166423A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5354299A (en) * | 1992-12-07 | 1994-10-11 | Linvatec Corporation | Method of revising a screw in a tunnel |
| WO1997006731A1 (en) * | 1995-08-14 | 1997-02-27 | Mitek Surgical Products, Inc. | Suture anchor assembly |
| WO2000059389A1 (en) * | 1999-04-02 | 2000-10-12 | Osteotech, Inc. | Surgical bone screw |
| US6187008B1 (en) * | 1999-07-07 | 2001-02-13 | Bristol-Myers Squibb | Device for temporarily fixing bones |
| EP1110510A1 (en) * | 1999-12-23 | 2001-06-27 | Karl Storz GmbH & Co. KG | Screw driven non-centrally |
| FR2855391A1 (en) | 2003-05-30 | 2004-12-03 | Xavier Renard | AUTO COMPRESSIVE SCREW TO JOIN TWO PORTIONS OF BONE |
| US20140107712A1 (en) | 2012-10-12 | 2014-04-17 | Smith & Nephew, Inc. | Fusion implant |
| US20140194937A1 (en) * | 2013-01-04 | 2014-07-10 | The General Hospital Corporation Dba Massachusetts General Hospital | Fastener |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3282985A1 (en) | 2018-02-21 |
| FR3034647A1 (en) | 2016-10-14 |
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