• 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 present invention relates to a centro-medullary nail (100) of a long bone comprising a proximal portion (1), a central portion (2), a distal portion (3), at least one fixation orifice (4) adapted to cooperate with a fastener, while the fixing hole (4) comprises a tapping at least two threads.
    公开号:FR3027211A1
    申请号:FR1550832
    申请日:2015-02-03
    公开日:2016-04-22
    发明作者:Jean-Pierre Perret
    申请人:J P P Man；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a centromedullary nail, capable of being introduced into a medullary canal of an ace, intended either to reduce a fracture of the head or the body of a long bone of a bone. patient, either to bone lengthening. In the case of fracture reduction, an intramedullary nail or rod acts as an internal guardian sharing with the bone the management of bio-mechanical stresses favoring bone consolidation. Center-medullary nails are generally used for the reduction of fractures of the tibia, femur or humerus. These nails are particularly advantageous especially for reducing fractures of the head of a bone to collect and consolidate multiple fractured fragments. Center-medullary nails are also used in bone lengthening of upper and lower limbs. These extension nails comprise a sliding portion, adjustable mechanically. A medullary nail is usually made of titanium alloy or stainless steel. A titanium alloy implant has the particularity of being able to combine mechanical stability with elastic properties. In addition, the advantage of a stainless steel implant lies in particular in increased resistance to significant mechanical stresses. Screws, usually self-drilling, hold the nail to fractured or elongated bone parts. These screws pass right through the centromedullary nail through fixing holes. These fixing holes are tapped by a single thread, such as in the document EP 0 855 882 for the reduction of a fracture of the femur and the documents FR 2 881 340, EP 1 398 000, and US 5,472,444 for the reduction of a fracture of a humerus. Since a centromedullary nail is of small diameter, the screw pitch of the tapping is necessarily narrow. Therefore, a number of revolution turns are required to cross the nail, which exerts significant pressure on the bones and surrounding tissues. Single thread tapping requires some screw rotation operations to engage the screw. It is thus not easy to be able to engage, without prior rotation, a screw in a single-threaded nut, to the maximum, by performing a revolution revolution. The present invention thus proposes a centromedullary nail that makes it possible to overcome the aforementioned drawbacks. . Thus, the centromedullary nail of a long bone according to the invention comprises a proximal portion, a central portion, a distal portion, at least one attachment hole adapted to cooperate with a fastener, while the orifice fastening comprises a tapping with at least two threads. It should be added that the fixing orifice preferably comprises a tapping with three threads. According to a complementary characteristic, the fixing orifice comprises a tapping with a constant axial pitch and a triangular profile. According to another characteristic, the proximal portion comprises at least two fastening apertures angularly offset one from the other relative to an angle of between 200 and 50 °, preferably between 30 ° and 40 °. Note that the tapping is preferably performed on a portion of the diameter of the centromedullary nail, more preferably centered along a longitudinal axis. Note that the fixing orifice comprises a helical pitch of between 1 and 3 millimeters (s). According to a complementary feature, the fixing orifice and / or the fixing member comprises a locking means of the fixing member.
    [0002] Other features and advantages of the invention will become apparent from the description which follows with reference to the accompanying drawings which are given by way of non-limiting examples. Figures 1 to 7 are views of a centro-medullary humeral nail 5 according to one embodiment of the invention. Figure 1 is a side view. FIG. 2 is a sectional view along the axis (AA) of FIG. 1. FIG. 3 is a magnification of the sectional view along the axis (CC) of FIG. 2. FIG. 4 is a view simplified version of Figure 2 with a fastener. FIG. 5 is a sectional view along (CC) of FIG. 4. FIG. 6 is a magnification of the detail view (D) of FIG. 5. FIG. 7 is a perspective view of the entrance of FIG. a fixing orifice. Thus, the central-medullary nail (100) according to the invention comprises in known manner a proximal portion (1), a central portion (2) and a distal portion (3). Note that the central-medullary nail (100) of the invention comprises fixing holes (4) comprising a tapping with at least two threads, preferably three threads, adapted to receive fastening members (5), such as screws, preferably self-drilling. It is understood that a threaded tapping corresponds to multiple threads parallel to each other. The fixing orifice (4) according to the invention thus comprises at least two threads, preferably three threads, staggered at the entrance of said orifice of at least 180 °, preferably 120 °, allowing the entry of a fixing member at least every half-turn, preferably every third of turns. This configuration of the fixing orifice (4) thus makes it possible to limit the manipulation by rotation of the fixing member (5) at the inlet of said fixing orifice (4). This configuration also makes it possible to obtain a greater advance for a turn of the screw in comparison with that of a single-threaded nut. In fact, with multi-threaded tapping, for the same longitudinal distance traveled, compared to a single-threaded tapping, the rotational movement is halved for double-threaded tapping and three-fold for triple-threaded tapping. . Thus, when inserting a screw into a single-threaded nut, the operator rotates a maximum of 3600, while with a nut with two or three threads, the surgeon performs a rotation of at most 1800 or maximum 120 ° respectively. In order to optimize the surgeon's gesture during the insertion and screwing operations, it is preferred to use a triple-threaded thread. The present invention thus makes it possible to limit the insertion manipulations of the fixation member (5) in the fixation orifice (4), and thus to limit the pressure exerted on the medullary nail (100) during the placement of the latter, and therefore, to limit the pressure on the bones and surrounding tissues. It is understood that the tapping thread forms a continuous helical protrusion and of uniform section on a cylindrical or conical, preferably cylindrical, surface. It is further understood that a helical pitch (Ph) is the distance between two consecutive vertices of the same thread. It is also understood that in the context of the invention of a tapping with several threads, the pitch (Pa) axial, corresponding to the distance between two consecutive vertices, is equal to the helical pitch (Ph) divided by the number of threads . It is also understood that for a nut to be assembled to a screw, the two elements must have the same characteristics, such as thread profile, nominal diameter (Dn), pitch (Ph) and direction of the helix. The fastener (5) therefore has a thread pitch equal to the helical pitch (Ph) of the thread of the fastening orifice (4) as illustrated in FIGS. 4 and 5. The helical pitch (Ph) d a net is between 1 and 3 millimeters (s).
    [0003] The helical pitch (Ph) of a thread is advantageously a function of the corresponding diameter of the fixing orifice (4). The pitch (Pa) is advantageously constant over the entire length of the tapping of the fixing orifice (4). The tapping advantageously has a triangular profile with an angle, advantageously equal to 60 °, but it could be otherwise, the thread is advantageously rounded or square. The fixing holes (4), according to one characteristic, are at least located in the proximal part (1) of the centromedullary nail (100), in particular for a reduction of a fracture of the head of a long bone of a 20 member. According to the preceding feature, the centromedullary nail (100) comprises at least two fixing apertures (4) in the proximal portion (1), preferably a number of fixing orifices (4) between 2 and 6. The orifices of fixation (4), according to another feature, are at least located in the central portion (2) and / or in the distal portion (3) of the centromedullary nail (100) for including a reduction of a fracture of the body of a long bone of a limb. The fixing orifices (4) are advantageously localized at the proximal (1), central (2) and distal (3) portions of the centromedullary nail (100), in particular for reducing a fracture, or for elongation of a long bone of a limb. According to an embodiment illustrated in particular in FIG. 2, the fixing orifices (4) are angularly offset, one with respect to the others, at an angle of between 200 and 500, preferably between 30 ° and 40 °, more preferably °. The angles between the fixing holes (4) are advantageously equal, but it could be otherwise. According to embodiments, the threads of the fixing orifices 10 (4) are made over the entire diameter, substantially all the diameter or over part of the diameter of the centromedullary nail (100), preferably over a portion of the diameter, centered along a longitudinal axis (AA). According to a characteristic of the invention, the fixing orifice (4) and / or the fixing member (5) comprises a means for locking the fastening member (4), for example by blocking means such as those described in documents EP1398000 and FR2881340, or commonly used locking means such as anti-disc washers and self-locking nuts. The upper end of the proximal portion (1) is adapted to be adapted, by means of attachment (13), to a nail guide tool for assisting the insertion of said centromedullary nail (100). ) in a medullary canal of a long bone of a limb. This said tool is thus intended to fit the upper end of the proximal portion (1) of the centromedullary nail (100) by means of a fixation means (B), closed after insertion by a screw ( 6). The distal portion (3) is adapted to be introduced into the medullary canal. The distal portion (3) is of either semi-cylindrical shape or profiled, preferably of profiled shape.
    [0004] It should be noted that the centromedullary nail (100) is advantageously of the short type, adapted for a reduction of a fracture of the head of a long bone of a limb. It should be noted that the centromedullary nail (100) is advantageously of the long type, suitable for reducing a fracture of the body of a long bone of a limb or bone lengthening. The central portion (2) is according to some particular embodiments, curved according to a gyration diameter or curved at an angle with the proximal portion as illustrated by US 5,472,444. 10
    权利要求:
    Claims (7)
    [0001]
    REVENDICATIONS1. Center-medullary nail (100) of a long bone comprising: a proximal portion (1), - a central portion (2), - a distal portion (3), at least one fixation orifice (4) adapted to cooperate with a fixing member (5), characterized in that the fixing orifice (4) comprises a tapping with at least two threads.
    [0002]
    2. centromedullary nail (100) according to claim 1, characterized in that the fixing orifice (4) comprises a thread with three threads.
    [0003]
    3. centromedullary nail (100) according to claim 1 or 2, characterized in that the fixing hole (4) comprises a tapping with a constant axial pitch (Pa) and a triangular profile.
    [0004]
    4. Center-medullary nail (100) according to any one of the preceding claims, characterized in that the proximal portion (1) comprises at least two fixing holes (4) angularly offset one relative to the other at an angle between 20 ° and 50 °, preferably between 30 ° and 40 °.
    [0005]
    5. centromedullary nail (100) according to any one of the preceding claims, characterized in that the tapping is performed on a portion of the diameter of the centromedullary nail, preferably centered along a longitudinal axis (A-A).
    [0006]
    6. centromedullary nail (100) according to any one of the preceding claims, characterized in that the fixing orifice (4) comprises a helical pitch (Ph) between 1 and 3 millimeters (s).
    [0007]
    7. centromedullary nail (100) according to any one of the preceding claims, characterized in that the fixing hole (4) and / or the fixing member (5) comprises a locking means of said fastener (5).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP0599752B1|1997-04-23|Osteosynthesis device for trochanteric or intertrochanteric fractures
    JP4918091B2|2012-04-18|Osteosynthesis device
    EP0392927A2|1990-10-17|Vertebral implant for osteosynthesis device
    EP0699420A2|1996-03-06|Osteosynthetic pin device
    EP3206607B1|2018-05-16|Intramedullary nail
    CA2330705A1|1999-11-04|Backbone osteosynthesis system for anterior fixing
    EP0283373A1|1988-09-21|Vertebral screw for an osteosynthesis device, especially for the lumbar and dorsal spine
    FR2941859A1|2010-08-13|OSTEOSYNTHESIS SCREW.
    FR2745709A1|1997-09-12|Screw threaded retainer for bone fractures
    FR2760628A1|1998-09-18|SCREW WITH THREADED HEAD FOR OSTEOSYNTHESIS OF BONE FRAGMENTS
    WO2012131246A1|2012-10-04|Plate for osteosynthesis
    FR3000664A3|2014-07-11|Screw for treatment of small bone in e.g. hand, has machining screed flush-mounted at sector of proximal turn of thread, and proximal and distal threaded portions arranged on coil for forming step edge in unscrewing direction of screw
    FR2735010A1|1996-12-13|RING OF OSTEOSYNTHESIS USABLE IN COMBINATION WITH A SPINDLE OR A SCREW, AND ANCILLARY FOR ITS COMPRESSION.
    WO2009112705A1|2009-09-17|Osteosynthesis device with rapid fixing means
    WO2009125085A2|2009-10-15|Transcortical anchoring device
    WO2017085376A1|2017-05-26|Dual-thread bone screw
    EP1560534B1|2007-07-11|Device for two-part ephyseal osteosynthesis, in particular for a nail or a plate
    FR2971413A1|2012-08-17|Cannulated self-tapping screw for osteosynthesis of e.g. hand bone, has threaded distal portion including thread whose proximal edge is inclined toward proximal side of screw and whose outer edge forms sharp edge with distal edge of thread
    FR2802796A1|2001-06-29|Bolt for connecting vertebra to longitudinal member, e.g. spine
    FR3000662A3|2014-07-11|Self-drilling and self-tapping bone screw for treatment of e.g. cortical bone, has notch extending from distal edge of screw, along base of cutting face of each tooth, where notch is arranged parallel to axis of screw
    FR2971138A1|2012-08-10|Self-compressive surgical implant bone screw for reduction of non-displaced fractures of bone segments during osteosynthesis, has fixtures succeeding one another at minimum frequency, and distal end provided with autoperforator arrangement
    FR2922749A1|2009-05-01|THREADED HEAD SCREW FOR OSTHEOSYNTHESIS
    EP1795138B1|2010-03-10|Intramedullary nail for osteosynthesis
    EP1361827B1|2007-08-08|Fixing screw
    WO2014191663A1|2014-12-04|Osteosynthesis device comprising a cervico-cephalic screw
    同族专利:
    公开号 | 公开日
    FR3027210A1|2016-04-22|
    EP3206607A1|2017-08-23|
    EP3206607B1|2018-05-16|
    WO2016059347A1|2016-04-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20070123878A1|2005-10-21|2007-05-31|Shaver Joseph A|Orthopedic rod with locking aperture|
    DE102009030177A1|2009-06-24|2010-12-30|Aesculap Ag|Implant for determining circular intramedullary nail in bone, has bone screw with thread shaft carries bone thread, tip, end and casing|
    US5472444A|1994-05-13|1995-12-05|Acumed, Inc.|Humeral nail for fixation of proximal humeral fractures|
    US6080159A|1996-07-16|2000-06-27|Sulzer Orthopedics Ltd.|Ascending centromedullary thigh bone pin with mechanical clamping of its two ends|
    DE60213800T2|2002-09-03|2007-08-16|Pennig, Dietmar, Dr.med. Priv. Doz.|Nail and screw for surgical fixation system|
    FR2881340B1|2005-02-01|2008-01-11|Tornier Sas|HUMERAL NUTS|CN106175899A|2016-06-29|2016-12-07|江苏艾迪尔医疗科技股份有限公司|Fibula intramedullary pin|
    US11083503B2|2016-09-22|2021-08-10|Globus Medical, Inc.|Systems and methods for intramedullary nail implantation|
    US10492803B2|2016-09-22|2019-12-03|Globus Medical, Inc.|Systems and methods for intramedullary nail implantation|
    法律状态:
    2016-02-25| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-22| PLSC| Search report ready|Effective date: 20160422 |
    2017-02-24| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-15| TP| Transmission of property|Owner name: 3 S ORTHO, FR Effective date: 20171114 |
    2018-01-16| PLFP| Fee payment|Year of fee payment: 4 |
    2019-02-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-07-10| RX| Complete rejection|Effective date: 20200529 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1459882A|FR3027210A1|2014-10-15|2014-10-15|CENTRO-MEDULLAIRE NAIL|EP15805562.4A| EP3206607B1|2014-10-15|2015-10-15|Intramedullary nail|
    PCT/FR2015/052775| WO2016059347A1|2014-10-15|2015-10-15|Intramedullary rod|
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