• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The surgical assembly (1) comprises: - a bone anchoring screw (2) having an anchoring portion (2a) in the spine and a head in the form of a sleeve (2b), and; - an extension device (3) intended to cap the sleeve (2b) of the bone anchoring screw (2) to achieve a longitudinal extension; said extension device (3) comprises a first tubular element, called an inner tube (4), of internal diameter greater than or equal to the internal diameter of the sleeve (2b) of the bone anchoring screw (2), and extending longitudinally by two branches (4a) diametrically opposed, forming a clamp capable of pinching the outer surface of the sleeve (2b) to lock thereon; - The extension device (3) comprises a second tubular element, said outer tube (8), slidably mounted along said inner tube (4), the outer tube (8) extending longitudinally by two branches (8a) whose ends are facing the free ends of the two branches (4a) of the inner tube (4), and each comprise retaining means (9) adapted to cooperate with complementary retaining means (9a) arranged on the sleeve (2b) for preventing said legs (8a) and the legs (4a) from moving apart from one another so as to allow the locking of the extension device (3) to remain on the bushing (2b) of the screw bone anchorage (2).
    公开号:FR3018678A1
    申请号:FR1452299
    申请日:2014-03-20
    公开日:2015-09-25
    发明作者:Roux Stephane Le；Philippe Pierre Laurito；Julien Bazille
    申请人:Spineway；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD The present invention relates to the technical sector of surgical instruments. The invention finds an advantageous application for the treatment of chronic instabilities, fractures or deformities of the spine, particularly for a minimally invasive posterior approach. However, the invention can be transposed in all applications in which a bone anchoring screw is implanted by a surgeon. STATE OF THE ART In the field of spinal osteosynthesis, it is well known to use spinal implants using at least two bone anchoring screws, in particular pedicular screws, intended to be screwed into the vertebra, and a connecting system (plate 20 or rod) uniting the two pedicle screws together to effect distraction or compression, and to redefine the curvature of the spine. The head of a bone anchoring screw is generally in the form of a socket adapted to receive transversely said connecting rod and longitudinally a locking member for locking the connecting rod in the head of the screw. In the context of implantation by a minimally invasive approach, the implantation and manipulation of these pedicle screws are difficult for the surgeon because the access is relatively narrow. It is customary to use extension devices of a pedicle screw to assist the surgeon, on the one hand, in the implantation and manipulation of the pedicle screws, and, on the other hand, to the placing the connecting rods of said pedicle screws. The extension device and the pedicle screw may be adapted to each other so as to form a surgical assembly for the treatment of instabilities, fractures or deformities of a spine.
    [0002] A known extension device is in the form of a tubular element whose one end is adapted to be temporarily fixed to the head of the pedicle screw. The tubular element is such that it allows free access to the screw head, and allows the insertion of a locking member of a connecting rod, and a tool for locking said locking member . The end of the tubular element may have for this purpose a form of clamp adapted to grip the outer wall of the pedicle screw head. The clamps may comprise on their internal surfaces facing the screw head, arrangements adapted to cooperate with complementary arrangements provided on the screw head to temporarily lock the cooperation between said screw head and the extension device. However, such arrangements are often not sufficient to optimally maintain the screw head in engagement at the end of the extension device. SUMMARY OF THE INVENTION One of the aims of the invention is therefore to remedy at least the aforementioned drawbacks by proposing a surgical assembly, comprising a bone anchoring screw and an extension device which make it possible to preserve the access to the socket of the bone anchor screw during the surgical procedure, while providing optimum temporary retention of said extension device on said screw head. Another object of the invention is to provide an extension device which makes it possible to facilitate the positioning of the bone anchoring screw connecting rods, as well as the setting up of the locking members of said link rods in the socket of the bone anchoring screw. For this purpose, it has therefore been developed a surgical assembly such as for example for the treatment of instabilities, fractures or deformations of the spine, said assembly comprising: - a bone anchoring screw having a portion anchoring in the spine, and a head in the form of a socket, and; - An extension device for capping the socket of the bone anchoring screw to achieve a longitudinal extension.
    [0003] According to the invention, the extension device comprises a first tubular element, called an internal tube, of internal diameter greater than or equal to the internal diameter of the socket of the bone anchoring screw to be capped. This inner tube extends longitudinally by two diametrically opposite branches. Said branches comprise an elasticity allowing them to be spaced apart or brought closer to each other. The free ends of the two branches form a clamp capable of pinching the outer surface of the sleeve to lock on it. Still according to the invention, the extension device comprises a second tubular element, said outer tube, mounted around the inner tube, and inner diameter fitted to the outer diameter of said inner tube so as to slide along said inner tube, between a so-called non-locking position and a so-called locking position of the bone anchoring screw. The outer tube extends longitudinally by two diametrically opposite branches and superimposed on the branches of the inner tube. The free ends of the two branches of the outer tube are facing the free ends of the two branches of the inner tube, and each comprise retaining means adapted to cooperate, when the device caps the socket of the bone anchoring screw, and when said outer tube is slid into its locking position, with complementary retaining means arranged on the sleeve to prevent said branches of the outer tube from moving away from each other, thereby preventing the branches of the inner tube from moving apart; of each other so as to allow the locking of the extension device to remain on the socket of the bone anchoring screw. In this way, the extension device can cap the socket of a bone anchoring screw so as to achieve a longitudinal extension to facilitate the handling and implantation of the bone anchoring screw. The inner diameter of the inner tube is greater than or equal to the inner diameter of the sleeve, so that the extension device allows to keep access to the socket of the bone anchoring screw through the inside of said inner tube. The locking of the extension device on the socket is optimal. The inner and outer tubes are extended by diametrically opposite branches so as to release a space between said branches to allow the establishment of a transverse connecting rod can be slid to the socket of the bone anchoring screw for its implementation.
    [0004] According to a particular embodiment, the complementary retaining means are contact surfaces formed at the ends of the branches of the outer tube and on the sleeve. Said contact surfaces are intended to bear against one another when the device caps a bone anchoring screw, and when the outer tube is slid into its locking position to prevent the branches of the outer tube from moving apart. one of the other. Advantageously, complementary fastening means capable of locking the longitudinal displacement of said branches of the inner tube relative to the outer surface of the sleeve are arranged, on the one hand, at the free ends of the branches of the inner tube, and on their internal surface intended to be in contact with the outer surface of the sleeve, and, secondly, on said outer surface of the sleeve. In this way, the locking of the extension device on the socket is all the more effective. Indeed, the complementary fastening means are able to lock the longitudinal displacement of the branches of the inner tube, so that it then becomes necessary to move said branches away from each other to unlock the device Gold, in the position of locking, the outer tube prevents said branches of the inner tube from deviating from each other. The locking is optimal According to a particular embodiment, the complementary fastening means are of the lug type and complementary housing adapted to cooperate with each other. The invention also relates separately and separately to an extension device, and a bone anchoring screw, comprising the aforementioned features and forming part of a surgical assembly as mentioned above. Advantageously, in the extension device according to the invention, at least one of the branches of the inner tube has at its free end a transverse shoulder adapted to make a stop against the socket of a bone anchoring screw when said device comes to cap said sleeve. According to another characteristic, the extension device comprises a locking member adapted to hold the outer tube in the locking position of the bone anchoring screw. Advantageously, the inner tube and the outer tube further comprise complementary guide means adapted to prevent the rotation of the outer tube relative to the inner tube.
    [0005] Furthermore, the branches of the inner tube each comprise on their inner surface a boss or shoulder. Said bosses are diametrically opposed, and facing each other so that when a suitable tool is inserted inside the inner tube, it abuts against said bosses to force the branches of the inner tube to deviate from each other. Preferably, the extension device according to the invention also includes the aforementioned tool in the form of a rod adapted to be introduced into the inner tube of said device to abut against the bosses or shoulders and force the branches of the tube. internal to deviate from each other. BRIEF DESCRIPTION OF THE DRAWINGS Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limiting, with reference to the appended figures in which: FIG. 1 is a representation schematic perspective view of a surgical assembly 20 for the treatment of instabilities, fractures or deformations of a spinal column according to the invention, before the extension device covers the bone anchoring screw, in particular the screw pedicle; FIG. 2 is a diagrammatic representation in perspective of a tool for assisting the installation of an extension device according to the invention; FIG. 3 is a diagrammatic representation of the face, illustrating in detail the end of the extension device before it covers the socket of a pedicle screw, with the presence of the tool for assisting the implementation of square ; FIG. 4 is a schematic representation similar to that of FIG. 3, illustrating in longitudinal and front section the placement of the extension device on the socket of a pedicle screw; FIG. 5 is a diagrammatic front view, illustrating the extension device placed on the socket of a pedicle screw, before locking the branches of the inner tube to the outer surface of said socket; FIG. 6 is a diagrammatic front view similar to that of FIG. 5, the positioning aid tool being removed and the branches being locked on the outer surface of the sleeve; - Figure 7 is a schematic representation similar to that of Figure 6, the surgical assembly being shown in longitudinal section and front; FIG. 8 is a diagrammatic representation in perspective, illustrating the surgical assembly according to the invention, the extension device covering the socket of a pedicle screw; - Figure 9 is a schematic perspective view similar to that of Figure 8, illustrating in detail the cooperation between the extension device and the pedicle screw; FIG. 10 is a diagrammatic perspective view similar to that of FIG. 8, the outer tube of the extension device being slid into its locking position of the pedicle screw; Figure 11 is a diagrammatic perspective view similar to that of Figure 10, illustrating in detail the cooperation between the outer tube in its locking position and the pedicle screw; - Figure 12 is a schematic representation similar to that of Figure 11, illustrating the entire front view; FIG. 13 is a diagrammatic perspective view similar to that of FIG. 10, illustrating the locking of the locking position of the outer tube of the extension device; Figure 14 is a schematic representation illustrating in perspective the end of the extension device about to receive a locking member in the form of an open ring; - Figure 15 is a schematic representation similar to that of Figure 14, the ring 35 is snapped to the end of the extension device; - Figure 16 is a schematic representation illustrating the device according to the invention comprising a longitudinal opening formed along said device DETAILED DESCRIPTION OF THE INVENTION The invention relates to a surgical assembly (1). By way of example, a surgical assembly (1) is described below for the treatment of instabilities, fractures or deformations of the spine. However, it is obvious that said surgical assembly can be transposed in all applications in which a bone anchoring screw is implanted by a surgeon. In the detailed application below, the bone anchoring screw is a pedicle screw.
    [0006] With reference to FIG. 1, the assembly (1) comprises, separately, a pedicle screw (2) and an extension device (3) for the pedicle screw (2), adapted to temporarily cooperate with each other on the time of a surgical operation of treatment of instabilities, fractures or deformations of the spine.
    [0007] The pedicle screw (2) comprises an anchoring portion (2a) in the spine, and a head in the form of a socket (2b). The sleeve (2b) is adapted to receive transversely a connecting rod, and a locking member of the connecting rod (not shown), forming part of a spinal implant well known to those skilled in the art. The socket (2b) of the pedicle screw (2) is adapted to receive the extension device (3) according to the invention.
    [0008] The extension device (3) comprises a first tubular element, said inner tube (4). In order to release access to the sleeve (2b) from the inside of said inner tube (4), the inner tube (4) comprises an internal diameter greater than or equal to the inner diameter of the sleeve (2b) to be capped. The inner tube (4) then allows the insertion of a tool (not shown) to manipulate the head of the pedicle screw (2), a tool (5) to assist in the introduction or removal of the extension device (3) on the sleeve (2b), or a locking member (not shown) for cooperating with the screw head to lock a connecting rod of two pedicle screws (2).
    [0009] Referring to Figures 3 and 4, the inner tube (4) extends longitudinally by two branches (4a) diametrically opposed. The branches (4a) comprise an elasticity allowing them to be spaced apart or close to each other, and the free ends of the two branches (4a) form a clamp intended to pinch the outer surface of the sleeve (2b) for lock on it. The elasticity of the branches (4a) allows, in part, to maintain the locking of the extension device (3) on the sleeve (2b). Advantageously, the free ends of the legs (4a) of the inner tube (4) each comprise a lug (6) arranged on their inner surface intended to be in contact with the outer surface of the sleeve (2b). Correspondingly, the outer surface of the socket (2b) of the pedicle screw (2) according to the invention comprises two recesses (6a) diametrically opposed and adapted to receive in engagement the lugs (6) of the free ends of the branches (4a) of the inner tube (4).
    [0010] Referring to Figure 7 when the lugs (6) cooperate with the complementary housing (6a) of the sleeve (2b), they are adapted to lock the longitudinal displacement of said legs (4a) of the inner tube (4) relative on the outer surface of the sleeve (2b). In other words, when the legs (4a) of the inner tube (4) are locked on the sleeve (2b), it then becomes necessary to move the branches (4a) away from each other to remove the lugs (6) housings (6a) and to unlock the extension device (3). The branches (4a) of the inner tube (4) therefore cap the sleeve (2b) (see Figures 8 and 9), and they have, at their free ends, a transverse shoulder (7) adapted to make a stop against the socket (2b) of a pedicle screw (2) when said extension device (3) caps the said socket (2b). The cooperation between the sleeve (2b) and the extension device (3) is then mastered. The extension device (3) then comprises a second tubular element, said outer tube (8), mounted around the inner tube (4). The inner diameter of the outer tube (8) is adjusted to the outer diameter of said inner tube (4) so as to slide along said inner tube (4), between a so-called non-locking position, and a so-called locking position of a pedicle screw (2) (see Figures 10, 11, 12).
    [0011] The outer tube (8) extends longitudinally by two branches (8a) diametrically opposite and superimposed on the legs (4a) of the inner tube (4). The branches (4a) of the inner tube (4), as well as the branches (8a) of the outer tube (8), are diametrically opposed and spaced from each other so as to allow the insertion of a rod of cross connection (not shown) between the legs (4a, 8a) of each tube (4, 8). This connecting rod can then be slid in a known manner to the socket (2b) of the pedicle screw (2) when the extension device (3) covers said sleeve (2b). The branches (8a) of the outer tube (8) also comprise an elasticity allowing them to be spaced apart or brought closer to each other so as not to interfere with the separation of the limbs (4a) of the inner tube (4) when the outer tube (8) is in its non-locking position. The elasticity of the branches (8a) of the outer tube (8) is however not essential. Indeed, with reference to Figure 7, a game (18) remains between the inner tube (4) and the outer tube (8). This clearance (18) allows the branches (4a) of the inner tube (4) to move away from each other. A shoulder (19) formed on the outer surface of the inner tube (4) allows the clearance (18) to be removed after locking, ie after the outer tube (8) has slid around the inner tube (4). ) towards the pedicle screw (2). Before locking, the outer tube (8) is located above said shoulder (19), and after locking, it is located at said shoulder (19). The free ends of the two branches (8a) of the outer tube (8), like those of the inner tube (4), are intended to be opposite the pedicle screw (2) when the extension device (3) covers the socket (2b) of a pedicle screw (2). Said free ends of the legs (8a) of the outer tube (8) each comprise contact surfaces (9) able to bear, when said outer tube (8) is slid in its locking position, with contact surfaces ( 9a) arranged on the sleeve (2b) of the pedicle screw (2) forming part of the surgical assembly (1), and capped by said extension device (3). The contact surfaces (9) of each of the branches (8a) of the outer tube (8) are inclined with respect to the transverse plane of the outer tube (8), and are turned towards the outside of each branch (8a), facing the spacing direction of each branch (8a). The contact surfaces (9) of one of the branches (8a) are diametrically opposed, symmetrical, and facing the contact surfaces (9) of the other branch (8a). The contact surfaces (9a) of the sleeve (2b) correspond to the contact surfaces (9) of the legs (8a) of the outer tube (8), and are inclined relative to the transverse plane of said sleeve (2b). Said contact surfaces (9a) of the sleeve (2b) are diametrically opposed, and are turned towards the inside of the sleeve (2b). By contact surfaces (9, 9a) is meant in particular inclined faces. The cooperation between said contact surfaces (9, 9a) is such that it goes against the spacing of the legs (8a) of the outer tube (8). The branches (8a) of the outer tube (8) are superimposed on the legs (4a) of the inner tube (4), and the inner diameter of the outer tube (8) is adjusted to the outer diameter of the inner tube (4), so that if the legs (8a) of the outer tube (8) can not deviate from each other, they also prevent the legs (4a) of the inner tube (4) from moving away from each other. the other. Thus, when the legs (4a) of the inner tube (4) are locked on the outer surface of the socket (2b) of the pedicle screw (2), and the outer tube (8) is slid in the locking position, the branches (8a) of the outer tube (8) prevent the legs (4a) of the inner tube (4) from moving away from one another and thus from unlocking. The extension device (3) is then optimally maintained in its locking position.
    [0012] To maintain the outer tube (8) in its locking position, and thus to maintain the locking of the extension device (3) on the socket (2b) of the pedicle screw (2), the extension device (3) comprises a locking member.
    [0013] This locking member may be in the form of a clamping nut (11) adapted to cooperate with a threaded external portion (10) of the end of the inner tube (4), opposite the branches (4a). With reference to FIG. 13, this threaded external portion (10) receives the tightening nut (11) which can be screwed until it abuts against the outer tube (8) and prevents it from sliding in its non-locking position. locking. The clamping nut (11) holds the outer tube (8) in the locking position. This locking member may be, for example, with reference to FIGS. 14, 15 and 16, in the form of an open ring (15) insertable transversely to the end of the inner tube (4), opposite the branches ( 4a). The ring (15) is inserted between on the one hand, a shoulder (17) formed at the end of the inner tube (4) and, on the other hand, the end of the outer tube (8). The ring (15) can be inserted only when the outer tube (8) is in the locking position. The open ring (15) comprises an elasticity allowing it to snap around the inner tube (4). Its elasticity allows it to stay in place once snapped. The open ring (15) advantageously and internally has right sides (15a) cooperating with complementary straight sides (16) formed on the outer surface of the inner tube (4) so as to lock said open ring (15) in rotation once. snapped.
    [0014] Once inserted, the ring (15) prevents the outer tube (8) from returning to the non-locking position. The opening of the ring (15) coincides with the space available between the two branches (4a, 8a) of the outer (8) and inner (4) tubes, and thus makes it possible to provide a longitudinal opening (18) all the along the extension device (3). This longitudinal opening (18) facilitates the insertion of a connecting rod.
    [0015] The inner tube (4) and the outer tube (8) also comprise complementary guide means adapted to prevent the rotation of said outer tube (8) with respect to said inner tube (4). These means may be of any suitable type, such as for example in the form of a longitudinal rib (not shown) formed on the outer surface of the inner tube (4) and a corresponding light (not shown), receiving the rib and formed in the thickness of the outer tube (8). With reference to FIG. 11, the guiding may for example be carried out at the ends of the branches (8a) of the outer tube (8), which branches (8a) can be divided into two fingers (12) arranged on both sides. other of the branch (4a) of the inner tube (4), the two fingers (12) being guided relative to this branch (4a) of the inner tube (4). According to a particular embodiment, it is the two fingers (12) of each branch (8a) of the outer tube (8) which comprise the contact surfaces (9) able to lock the spacing of said branches (8a). The branches (4a) of the inner tube (4) comprise an elasticity allowing them to move away from or towards each other. To cap a sleeve (2b), it is necessary to spread the branches (4a) of the inner tube (4). The spacing may be achieved automatically by the cooperation of the sleeve (2b) and the branches (4a), in particular by means of inclined slope (13) for example (see Figure 4). However, when the branches (4a) of the inner tube (4) comprise lugs (6), or more particularly when it is necessary to separate the branches (4a) of the inner tube (4) 15 one of the other to unlock the extension device (3) of the socket (2b), it may be necessary to use a specific tool (5). To do this, the legs (4a) of the inner tube (4) each comprise on their inner surface a boss or a shoulder (14). Said bosses (14) are diametrically opposed and facing each other so that when a suitable tool (5) is inserted inside the inner tube (4), it abuts against said bosses (14) for forcing the limbs (4a) of the inner tube (4) to move away from each other (see Figures 5 and 6). With reference to FIG. 2, the specific tool (5) for assisting the insertion of the extension device (3) can be of any suitable type, and can be in the form of a rod ( 5a) adapted to be introduced into the inner tube (4) of said extension device (3) in order to abut against the bosses or shoulders (14) and to force the branches (4a) of the inner tube (4) to move apart. one of the other.
    [0016] Thus, with reference to FIGS. 5 and 6, the tool (5) for assisting the insertion of the extension device (3) can also be used to separate the branches (4a) from the inner tube (4). ) to facilitate the introduction of the extension device (3) on the sleeve (2b), or during the unlocking of said extension device (3).
    [0017] As is apparent from the foregoing, the invention provides a surgical assembly (1) for the treatment of instabilities, fractures or deformities of a spinal column comprising an extension device (3) and a pedicle screw ( 2) which makes it possible to maintain access to the socket (2b) of the pedicle screw (2) during the surgical operation, while ensuring an optimal temporary retention of said extension device (3) on said screw head (2 ). The extension device (3) also makes it easier to place a pedicle screw connecting rod (2) and to position the locking members of the connecting rod in the socket (2). 2b) of the pedicle screw (2), which connecting rod and locking member of the rod being well known to those skilled in the art. The extension device (3) also facilitates the placement of all the instruments necessary for the surgical operation that allow the placement of the implants and make the corrections to the spine.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. A surgical assembly (1) comprising: - a bone anchoring screw (2) having an anchoring portion (2a) in the spine and a head in the form of a socket (2b), and; - an extension device (3) intended to cap the sleeve (2b) of the bone anchoring screw (2) to achieve a longitudinal extension; characterized in that: - said extension device (3) comprises a first tubular element, said inner tube (4), of internal diameter greater than or equal to the internal diameter of the sleeve (2b) of the bone anchoring screw ( 2), and extending longitudinally by two diametrically opposite branches (4a), said branches (4a) comprising an elasticity allowing them to be spaced apart or brought closer to each other, and the free ends of the two branches (4a) form a clamp adapted to clamp the outer surface of the sleeve (2b) to lock thereon; - The extension device (3) comprises a second tubular element, said outer tube (8), mounted around the inner tube (4), and inner diameter fitted to the outer diameter of said inner tube (4) so as to slide along said inner tube (4), between a so-called non-locking position and a so-called locking position of the bone anchoring screw (2), the outer tube (8) extending longitudinally by two diametrically opposed branches (8a). and superposed on the branches (4a) of the inner tube (4), the free ends of the two branches (8a) of the outer tube (8) are opposite the free ends of the two branches (4a) of the inner tube (4), and comprise each of the retaining means (9) adapted to cooperate, when the extension device (3) covers the sleeve (2b) of the bone anchoring screw (2) and when said outer tube (8) is slid into its position locking device, with complementary retaining means (9a) arranged on the sleeve (2b) for preventing said legs (8a) of the outer tube (8) from moving apart, thereby preventing the legs (4a) of the inner tube (4) from moving apart from each other the other so as to maintain the locking of the extension device (3) on the sleeve (2b) of the bone anchoring screw (2).
    [0002]
    2. Surgical assembly (1) according to claim 1, characterized in that the complementary retaining means are contact surfaces (9) formed at the ends of the legs (8a) of the outer tube (8) and on the sleeve (2b). , said contact surfaces (9) being intended to bear against each other when the outer tube (8) is slid into its locking position to prevent the legs (8a) of the outer tube (8) from moving apart one from the other.
    [0003]
    3. Surgical assembly (1) according to claim 1, characterized in that complementary fixing means (6, 6a) adapted to lock the longitudinal displacement of said branches (4a) of the inner tube (4) relative to the outer surface of the bushing (2b) are arranged, on the one hand, at the free ends of the legs (4a) of the inner tube (4), and on their inner surface intended to be in contact with the outer surface of the sleeve (2b), and on the other hand, on said outer surface of the sleeve (2b).
    [0004]
    4. Extension device (3) forming part of a surgical assembly (1) according to claim 1, said extension device (3) being adapted to cap a sleeve (2b) of an anchor screw bone (2) comprising retaining means (9a), characterized in that said extension device (3) comprises: - a first tubular element, said inner tube (4), of internal diameter substantially equal to the internal diameter of the sleeve (2b) to be capped, and extending longitudinally by two branches (4a) diametrically opposed, said branches (4a) comprising an elasticity allowing them to be spaced apart or moved closer to each other, and the free ends of the two branches (4a) form a clip for gripping the outer surface of the sleeve (2b) to lock thereon; a second tubular element, referred to as an outer tube (8), mounted around the inner tube (4), and of internal diameter fitted to the external diameter of said inner tube (4) so as to slide along said inner tube (4), between a so-called non-locking position and a so-called locking position of a bone anchoring screw (2), the outer tube (8) extending longitudinally by two branches (8a) diametrically opposite and superimposed on the branches (4a) of the internal tube (4), the free ends of the two branches (8a) are opposite the free ends of the two branches (4a) of the inner tube (4), and each comprise retaining means (9) adapted to cooperate, when said outer tube (8) is slid in its locking position, with said complementary retaining means (9a) that includes the sleeve (2b) to prevent said legs (8a) of the outer tube (8) from moving apart one of the other, thus preventing the branches (4a) of the int tube erne (4) to move away from each other so as to allow the locking of the extension device (3) to be held on a socket (2b) of a bone anchoring screw (2).
    [0005]
    5. Expansion device (3) according to claim 4, characterized in that at least one of the legs (4a) of the inner tube (4) has at its free end a transverse shoulder (7) adapted to achieve a abutting against a socket (2b) of a bone anchoring screw (2) when said extension device (3) caps the said sleeve (2b).
    [0006]
    6. Extension device (3) according to claim 4, characterized in that it comprises a locking member adapted to maintain the outer tube (8) in the locking position of the bone anchoring screw (2).
    [0007]
    7. Extension device (3) according to claim 4, characterized in that the inner tube (4) and the outer tube (8) comprise complementary guide means (12, 4a) adapted to prevent the rotation of the outer tube (8) relative to the inner tube (4).
    [0008]
    8. Expansion device (3) according to claim 4, characterized in that the legs (4a) of the inner tube (4) each comprise on their inner surface a boss or shoulder (14), said bosses (14) being diametrically opposed and facing each other so that when a suitable tool (5) is inserted inside the inner tube (4), it abuts against said bosses (14) to force the branches (4a) of the inner tube (4) to deviate from each other.
    [0009]
    9. Expansion device (3) according to claim 8, characterized in that it comprises a tool (5) in the form of a rod (5a) adapted to be introduced into the inner tube (4) of said device. extension (3) to abut against the bosses or shoulders (14) and force the branches (4a) of the inner tube (4) to deviate from one another.
    [0010]
    Bone anchoring screw (2) forming part of a surgical assembly (1) according to claim 1, said bone anchoring screw (2) comprising an anchoring portion (2a) and a socket (2b) adapted to receive an extension device (3) comprising at least one outer tube (8) adapted to adopt a locking position and comprising two branches (8a) which comprise at one of their ends retaining means (9) characterized in that the bushing (2b) comprises complementary retaining means (9a) adapted to cooperate with the retaining means (9) of the legs (8a) of the outer tube (8) of the extension device (3), so that when the extension device (3) is received on the sleeve (2b), and the outer tube (8) is in the locking position, said retaining means (9, 9a) prevent said legs (8a) outer tube (8) to move away from each other.
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    同族专利:
    公开号 | 公开日
    WO2015140440A1|2015-09-24|
    US20170164980A1|2017-06-15|
    FR3018678B1|2016-03-11|
    US10265105B2|2019-04-23|
    EP3119298A1|2017-01-25|
    EP3119298B1|2018-02-07|
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    法律状态:
    2015-03-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-29| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-27| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-29| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-29| ST| Notification of lapse|Effective date: 20191106 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1452299A|FR3018678B1|2014-03-20|2014-03-20|SURGICAL ASSEMBLY, BONE ANCHORING SCREW AND DEVICE FOR EXTENSION OF SUCH SCREWS FORMING PART OF SAID SURGICAL ASSEMBLY|FR1452299A| FR3018678B1|2014-03-20|2014-03-20|SURGICAL ASSEMBLY, BONE ANCHORING SCREW AND DEVICE FOR EXTENSION OF SUCH SCREWS FORMING PART OF SAID SURGICAL ASSEMBLY|
    EP15714571.5A| EP3119298B1|2014-03-20|2015-03-04|Surgical assembly, and bone anchor screw and device for extending one such screw that belong to said surgical assembly|
    US15/127,595| US10265105B2|2014-03-20|2015-03-04|Surgical assembly, and bone anchor screw and device for extending one such screw that belong to said surgical assembly|
    PCT/FR2015/050535| WO2015140440A1|2014-03-20|2015-03-04|Surgical assembly, and bone anchor screw and device for extending one such screw that belong to said surgical assembly|
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